Maryland
Area code 443
Area code 443 covers Baltimore, Annapolis, Towson, Columbia, Catonsvl and more in Maryland, in the Eastern time zone. It has been in service since 1997. It shares its area with 410, 667 (an overlay).
WhereMaryland
Time zoneEastern
Exchanges785
Flagged numbers23233 complaints
Most reported 443 numbers
(443) 714-6928CautionPolitical(443) 714-6779CautionPolitical(443) 714-6926CautionPolitical(443) 714-6925CautionPolitical(443) 714-6923CautionPolitical(443) 714-6775CautionPolitical(443) 328-0869CautionMedicare / Medicaid(443) 714-6921CautionPolitical(443) 328-0872Caution(443) 302-8507CautionPolitical(443) 328-0871CautionMedicare / Medicaid(443) 536-6537CautionMortgage loans(443) 818-9598CautionPolitical(443) 725-9925CautionMortgage loans(443) 285-0200Caution(443) 725-9938Caution(443) 338-1263CautionHome improvement(443) 230-4650Caution(443) 582-9921Caution(443) 637-9571Caution(443) 842-4917Caution(443) 992-6099Caution(443) 960-7707Caution
Carriers in 443
Line types
Counted over the exchanges, from the carrier each was assigned to.
Cities in area code 443
BaltimoreAnnapolisTowsonColumbiaCatonsvlSalisburyBel AirWestminster
Every 443 exchange
The first six digits of a number. Each one with 3 or more flagged numbers has its own page: who it was assigned to and the numbers in it.
| Exchange | City | Carrier | Type | Flagged |
|---|---|---|---|---|
| 443-200 | Woodlawn | Verizon Business | VoIP | 0 |
| 443-201 | Westminster | AT&T Mobility | Wireless | 0 |
| 443-202 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-203 | Westminster | Verizon | Landline | 0 |
| 443-204 | AT&T Mobility | Wireless | 0 | |
| 443-205 | Cambridge | Verizon Wireless | Wireless | 0 |
| 443-206 | Perryville | Verizon Wireless | Wireless | 0 |
| 443-207 | Elkton | T-Mobile | Wireless | 0 |
| 443-208 | Baltimore | T-Mobile | Wireless | 0 |
| 443-209 | Havre de Grace | Windstream (PAETEC) | VoIP | 0 |
| 443-210 | Salisbury | T-Mobile | Wireless | 0 |
| 443-212 | Windstream (PAETEC) | VoIP | 0 | |
| 443-213 | Verizon | Landline | 0 | |
| 443-214 | Annapolis | AT&T Mobility | Wireless | 0 |
| 443-215 | Chestertown | Core Communications | Landline | 0 |
| 443-216 | Dundalk | Windstream (PAETEC) | VoIP | 0 |
| 443-217 | Annapolis | Core Communications | Landline | 0 |
| 443-218 | Lumen (Level 3) | VoIP | 0 | |
| 443-219 | Parkville | Lumen (Level 3) | VoIP | 0 |
| 443-220 | Baltimore | Verizon | Landline | 0 |
| 443-221 | Annapolis | Lumen (Level 3) | VoIP | 0 |
| 443-222 | Onvoy (Sinch) | VoIP | 0 | |
| 443-223 | Annapolis | Verizon Wireless | Wireless | 0 |
| 443-224 | Baltimore | Verizon Business | VoIP | 0 |
| 443-225 | Cambridge | T-Mobile (Metro) | Wireless | 0 |
| 443-226 | Baltimore | T-Mobile | Wireless | 0 |
| 443-227 | Port Deposit | Windstream (PAETEC) | VoIP | 0 |
| 443-228 | Chevy Chase | Windstream (PAETEC) | VoIP | 0 |
| 443-229 | Severna Pk | Windstream (PAETEC) | VoIP | 0 |
| 443-230 | Odenton | Windstream (PAETEC) | VoIP | 1 |
| 443-231 | Essex | AT&T | VoIP | 0 |
| 443-232 | Willards | Core Communications | Landline | 0 |
| 443-233 | Vienna | Windstream (PAETEC) | VoIP | 0 |
| 443-234 | Snow Hill | Windstream (PAETEC) | VoIP | 0 |
| 443-235 | Salisbury | Verizon Wireless | Wireless | 0 |
| 443-236 | Cardiff | Core Communications | Landline | 0 |
| 443-237 | North Beach | Core Communications | Landline | 0 |
| 443-238 | Parkton | Windstream (PAETEC) | VoIP | 0 |
| 443-239 | Easton | AT&T Mobility | Wireless | 0 |
| 443-240 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-241 | Westminster | Onvoy (Sinch) | VoIP | 0 |
| 443-242 | Windstream (PAETEC) | VoIP | 0 | |
| 443-243 | Fallston | Verizon Wireless | Wireless | 0 |
| 443-244 | Westminster | Lumen (Level 3) | VoIP | 0 |
| 443-245 | Elkton | Windstream (PAETEC) | VoIP | 0 |
| 443-246 | Elkton | Core Communications | Landline | 0 |
| 443-247 | Union Bridge | Windstream (PAETEC) | VoIP | 0 |
| 443-248 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-249 | Stevensvl | Verizon | Landline | 0 |
| 443-250 | Baltimore | T-Mobile | Wireless | 0 |
| 443-251 | Catonsvl | Onvoy (Sinch) | VoIP | 0 |
| 443-252 | Perryville | Verizon Wireless | Wireless | 0 |
| 443-253 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-254 | Annapolis | T-Mobile | Wireless | 0 |
| 443-255 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-256 | North East | Windstream (PAETEC) | VoIP | 0 |
| 443-257 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-258 | Easton | AT&T Mobility | Wireless | 0 |
| 443-259 | Columbia | Verizon | Landline | 0 |
| 443-260 | Salisbury | Verizon | Landline | 0 |
| 443-261 | Severna Pk | Verizon Business | VoIP | 0 |
| 443-262 | Centreville | Verizon | Landline | 0 |
| 443-263 | Baltimore | Verizon | Landline | 0 |
| 443-264 | Core Communications | Landline | 0 | |
| 443-265 | Fork | Windstream (PAETEC) | VoIP | 0 |
| 443-266 | Glenwood | Bandwidth | VoIP | 0 |
| 443-267 | AT&T | VoIP | 0 | |
| 443-268 | Baltimore | Core Communications | Landline | 0 |
| 443-269 | Towson | Core Communications | Landline | 0 |
| 443-270 | Windstream (PAETEC) | VoIP | 0 | |
| 443-271 | Baltimore | T-Mobile | Wireless | 0 |
| 443-272 | AT&T | VoIP | 0 | |
| 443-273 | AT&T | VoIP | 0 | |
| 443-274 | Severn | Verizon | Landline | 0 |
| 443-275 | Towson | Comcast (Xfinity) | VoIP | 0 |
| 443-276 | Columbia | Verizon Business | VoIP | 0 |
| 443-277 | Sykesville | T-Mobile (Metro) | Wireless | 0 |
| 443-278 | Baltimore | Global Telecom Brokers | Landline | 0 |
| 443-279 | Towson | Verizon Business | VoIP | 0 |
| 443-280 | Sykesville | AT&T Mobility | Wireless | 0 |
| 443-281 | Cockeysvl | Verizon Business | VoIP | 0 |
| 443-282 | Chestertown | T-Mobile (Metro) | Wireless | 0 |
| 443-283 | Columbia | Windstream (PAETEC) | VoIP | 0 |
| 443-284 | Core Communications | Landline | 0 | |
| 443-285 | Columbia | Verizon | Landline | 1 |
| 443-286 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-287 | Baltimore | Verizon | Landline | 0 |
| 443-288 | Verizon Business | VoIP | 0 | |
| 443-289 | Westminster | Verizon Business | VoIP | 0 |
| 443-290 | Parkville | Lumen (Level 3) | VoIP | 0 |
| 443-291 | Hampstead | Lumen (Level 3) | VoIP | 0 |
| 443-292 | Crofton | Lumen (Level 3) | VoIP | 0 |
| 443-293 | Westminster | Verizon Wireless | Wireless | 0 |
| 443-294 | Westminster | Bandwidth | VoIP | 0 |
| 443-295 | Lumen (Level 3) | VoIP | 0 | |
| 443-296 | Lumen (Level 3) | VoIP | 0 | |
| 443-297 | Arbutus | AT&T | VoIP | 0 |
| 443-298 | Easton | AT&T Mobility | Wireless | 0 |
| 443-299 | Fallston | Verizon Wireless | Wireless | 0 |
| 443-300 | Sykesville | Lumen (Level 3) | VoIP | 0 |
| 443-301 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-302 | Crofton | Lumen (Level 3) | VoIP | 1 |
| 443-303 | Aberdeen | Lumen (Level 3) | VoIP | 0 |
| 443-304 | Arbutus | Bandwidth | VoIP | 0 |
| 443-305 | Lumen (Level 3) | VoIP | 0 | |
| 443-306 | Severna Pk | T-Mobile (Metro) | Wireless | 0 |
| 443-307 | Bel Air | Lumen (Level 3) | VoIP | 0 |
| 443-308 | Severn | Verizon Business | VoIP | 0 |
| 443-309 | Elkton | T-Mobile (Metro) | Wireless | 0 |
| 443-310 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-312 | Lumen (Level 3) | VoIP | 0 | |
| 443-313 | Fork | Lumen (Level 3) | VoIP | 0 |
| 443-314 | Baltimore | T-Mobile | Wireless | 0 |
| 443-315 | Catonsvl | AT&T Mobility | Wireless | 0 |
| 443-316 | Woodlawn | Lumen (Level 3) | VoIP | 0 |
| 443-317 | Chevy Chase | Bandwidth | VoIP | 0 |
| 443-318 | Cockeysvl | Windstream (PAETEC) | VoIP | 0 |
| 443-319 | Columbia | Windstream (PAETEC) | VoIP | 0 |
| 443-320 | Baltimore | Lumen (Level 3) | VoIP | 0 |
| 443-321 | Annapolis | Windstream (PAETEC) | VoIP | 0 |
| 443-322 | Towson | Windstream (PAETEC) | VoIP | 0 |
| 443-323 | Sharptown | Windstream (PAETEC) | VoIP | 0 |
| 443-324 | Baltimore | T-Mobile | Wireless | 0 |
| 443-325 | Windstream (PAETEC) | VoIP | 0 | |
| 443-326 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-327 | Aberdeen | Windstream (PAETEC) | VoIP | 0 |
| 443-328 | Sykesville | Windstream (PAETEC) | VoIP | 3 |
| 443-329 | Lumen (Level 3) | VoIP | 0 | |
| 443-330 | Cockeysvl | Windstream (PAETEC) | VoIP | 0 |
| 443-331 | Taneytown | Windstream (PAETEC) | VoIP | 0 |
| 443-332 | Crofton | Windstream (PAETEC) | VoIP | 0 |
| 443-333 | Annapolis | AT&T Mobility | Wireless | 0 |
| 443-334 | Verizon Business | VoIP | 0 | |
| 443-335 | T-Mobile (Metro) | Wireless | 0 | |
| 443-336 | Annapolis | T-Mobile | Wireless | 0 |
| 443-337 | Core Communications | Landline | 0 | |
| 443-338 | Windstream (PAETEC) | VoIP | 1 | |
| 443-339 | Sherwd For | Windstream (PAETEC) | VoIP | 0 |
| 443-340 | Westminster | Verizon Wireless | Wireless | 0 |
| 443-341 | Catonsvl | Lumen (Level 3) | VoIP | 0 |
| 443-342 | Solomons | Windstream (PAETEC) | VoIP | 0 |
| 443-343 | Millersvl | AT&T | VoIP | 0 |
| 443-344 | Severna Pk | Core Communications | Landline | 0 |
| 443-345 | Aberdeen | Lumen (Level 3) | VoIP | 0 |
| 443-346 | Severna Pk | Core Communications | Landline | 0 |
| 443-347 | Cardiff | Windstream (PAETEC) | VoIP | 0 |
| 443-348 | Woodlawn | AT&T | VoIP | 0 |
| 443-349 | Silver Run | Core Communications | Landline | 0 |
| 443-350 | Elkton | Verizon Wireless | Wireless | 0 |
| 443-351 | Odenton | Windstream (PAETEC) | VoIP | 0 |
| 443-352 | Lumen (Level 3) | VoIP | 0 | |
| 443-353 | Cockeysvl | Verizon | Landline | 0 |
| 443-354 | Lumen (Level 3) | VoIP | 0 | |
| 443-355 | Lumen (Level 3) | VoIP | 0 | |
| 443-356 | Bel Air | Lumen (Level 3) | VoIP | 0 |
| 443-357 | Verizon | Landline | 0 | |
| 443-358 | Salisbury | YMax (magicJack) | VoIP | 0 |
| 443-359 | Delmar | Verizon Wireless | Wireless | 0 |
| 443-360 | Aberdeen | AT&T | VoIP | 0 |
| 443-361 | Sykesville | Core Communications | Landline | 0 |
| 443-362 | Easton | T-Mobile | Wireless | 0 |
| 443-363 | Severn | Core Communications | Landline | 0 |
| 443-364 | AT&T | VoIP | 0 | |
| 443-365 | Salisbury | T-Mobile | Wireless | 0 |
| 443-366 | Salisbury | T-Mobile (Metro) | Wireless | 0 |
| 443-367 | Columbia | Verizon | Landline | 0 |
| 443-368 | Westminster | Core Communications | Landline | 0 |
| 443-369 | Bel Air | Core Communications | Landline | 0 |
| 443-370 | Annapolis | AT&T Mobility | Wireless | 0 |
| 443-371 | Bel Air | Lumen (Level 3) | VoIP | 0 |
| 443-372 | Edgewood | Windstream (PAETEC) | VoIP | 0 |
| 443-373 | Ocean City | T-Mobile (Metro) | Wireless | 0 |
| 443-374 | Aberdeen | Windstream (PAETEC) | VoIP | 0 |
| 443-375 | Hampstead | T-Mobile (Metro) | Wireless | 0 |
| 443-376 | Dundalk | AT&T | VoIP | 0 |
| 443-377 | Towson | Verizon Wireless | Wireless | 0 |
| 443-378 | Baltimore | T-Mobile | Wireless | 0 |
| 443-379 | Comcast (Xfinity) | VoIP | 0 | |
| 443-380 | Woodlawn | Lumen (Level 3) | VoIP | 0 |
| 443-381 | AT&T Mobility | Wireless | 0 | |
| 443-382 | Cambridge | Core Communications | Landline | 0 |
| 443-383 | Silver Run | Windstream (PAETEC) | VoIP | 0 |
| 443-384 | Parkville | Windstream (PAETEC) | VoIP | 0 |
| 443-385 | Easton | Core Communications | Landline | 0 |
| 443-386 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-387 | Pocomoke City | Core Communications | Landline | 0 |
| 443-388 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-389 | Salisbury | Core Communications | Landline | 0 |
| 443-390 | Churchvl | Bandwidth | VoIP | 0 |
| 443-391 | Cockeysvl | Lumen (Level 3) | VoIP | 0 |
| 443-392 | Baltimore | AT&T | VoIP | 0 |
| 443-393 | Columbia | Lumen (Level 3) | VoIP | 0 |
| 443-394 | Verizon | Landline | 0 | |
| 443-395 | Aberdeen | Verizon | Landline | 0 |
| 443-396 | Odenton | Lumen (Level 3) | VoIP | 0 |
| 443-397 | Salisbury | Verizon Wireless | Wireless | 0 |
| 443-398 | Sykesville | T-Mobile (Metro) | Wireless | 0 |
| 443-399 | Dundalk | Onvoy (Sinch) | VoIP | 0 |
| 443-400 | Verizon Business | VoIP | 0 | |
| 443-401 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-402 | Edgewood | AT&T | VoIP | 0 |
| 443-403 | Aberdeen | Lumen (Level 3) | VoIP | 0 |
| 443-404 | Solomons | T-Mobile (Metro) | Wireless | 0 |
| 443-405 | Comcast (Xfinity) | VoIP | 0 | |
| 443-406 | Elkton | AT&T | VoIP | 0 |
| 443-407 | Dundalk | Verizon Business | VoIP | 0 |
| 443-408 | Verizon Business | VoIP | 0 | |
| 443-409 | Edgewood | Windstream (PAETEC) | VoIP | 0 |
| 443-410 | Lumen (CenturyLink) | Landline | 0 | |
| 443-412 | Churchvl | AT&T | VoIP | 0 |
| 443-413 | Baltimore | T-Mobile | Wireless | 0 |
| 443-414 | Baltimore | T-Mobile | Wireless | 0 |
| 443-415 | Baltimore | T-Mobile | Wireless | 0 |
| 443-416 | Baltimore | T-Mobile | Wireless | 0 |
| 443-417 | Fallston | AT&T | VoIP | 0 |
| 443-418 | Baltimore | T-Mobile | Wireless | 0 |
| 443-419 | Glenwood | Windstream (PAETEC) | VoIP | 0 |
| 443-420 | Bandwidth | VoIP | 0 | |
| 443-421 | Fork | AT&T Mobility | Wireless | 0 |
| 443-422 | AT&T Mobility | Wireless | 0 | |
| 443-423 | Baltimore | Lumen (Level 3) | VoIP | 0 |
| 443-424 | Cardiff | AT&T | VoIP | 0 |
| 443-425 | Parkville | AT&T | VoIP | 0 |
| 443-426 | Windstream (PAETEC) | VoIP | 0 | |
| 443-427 | Princess Anne | Core Communications | Landline | 0 |
| 443-428 | Cockeysvl | Core Communications | Landline | 0 |
| 443-429 | Woodlawn | Windstream (PAETEC) | VoIP | 0 |
| 443-430 | Columbia | Verizon Business | VoIP | 0 |
| 443-431 | Core Communications | Landline | 0 | |
| 443-432 | Windstream (PAETEC) | VoIP | 0 | |
| 443-433 | Annapolis | Verizon Business | VoIP | 0 |
| 443-434 | Federalsburg | Telnyx | VoIP | 0 |
| 443-435 | Baltimore | T-Mobile | Wireless | 0 |
| 443-436 | Woodlawn | Verizon | Landline | 0 |
| 443-437 | Pocomoke City | AT&T | VoIP | 0 |
| 443-438 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-439 | Trappe | Verizon Wireless | Wireless | 0 |
| 443-440 | Annapolis | Verizon Business | VoIP | 0 |
| 443-441 | Glenwood | AT&T | VoIP | 0 |
| 443-442 | Parkville | Windstream (PAETEC) | VoIP | 0 |
| 443-443 | Arbutus | Commio | VoIP | 0 |
| 443-444 | Baltimore | Verizon | Landline | 0 |
| 443-445 | Elkridge | Verizon | Landline | 0 |
| 443-446 | Queenstown | Verizon Business | VoIP | 0 |
| 443-447 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-448 | Denton | Comcast (Xfinity) | VoIP | 0 |
| 443-449 | Baltimore | Windstream (PAETEC) | VoIP | 0 |
| 443-450 | Lumen (Level 3) | VoIP | 0 | |
| 443-451 | Baltimore | Windstream (PAETEC) | VoIP | 0 |
| 443-452 | Baltimore | Windstream (PAETEC) | VoIP | 0 |
| 443-453 | Baltimore | Onvoy (Sinch) | VoIP | 0 |
| 443-454 | Annapolis | T-Mobile | Wireless | 0 |
| 443-455 | Baltimore | Verizon | Landline | 0 |
| 443-456 | Edgewood | Comcast (Xfinity) | VoIP | 0 |
| 443-457 | AT&T | VoIP | 0 | |
| 443-458 | Annapolis | Verizon Business | VoIP | 0 |
| 443-459 | Elkridge | Windstream (PAETEC) | VoIP | 0 |
| 443-460 | Essex | Verizon Business | VoIP | 0 |
| 443-461 | Parkville | Windstream (PAETEC) | VoIP | 0 |
| 443-462 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-463 | Baltimore | T-Mobile | Wireless | 0 |
| 443-464 | Churchvl | Windstream (PAETEC) | VoIP | 0 |
| 443-465 | Towson | Verizon Wireless | Wireless | 0 |
| 443-466 | Elkton | T-Mobile (Metro) | Wireless | 0 |
| 443-467 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-468 | Baltimore | T-Mobile | Wireless | 0 |
| 443-469 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-470 | Towson | Windstream (PAETEC) | VoIP | 0 |
| 443-471 | Windstream (PAETEC) | VoIP | 0 | |
| 443-472 | Columbia | Lumen (Level 3) | VoIP | 0 |
| 443-473 | Baltimore | T-Mobile | Wireless | 0 |
| 443-474 | Catonsvl | AT&T Mobility | Wireless | 0 |
| 443-475 | Baltimore | Verizon Business | VoIP | 0 |
| 443-476 | Annapolis | Verizon | Landline | 0 |
| 443-477 | Cambridge | Verizon Wireless | Wireless | 0 |
| 443-478 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-479 | Verizon | Landline | 0 | |
| 443-480 | Chestertown | Verizon Wireless | Wireless | 0 |
| 443-481 | Annapolis | Windstream (PAETEC) | VoIP | 0 |
| 443-482 | Annapolis | Verizon | Landline | 0 |
| 443-483 | Cardiff | Lumen (Level 3) | VoIP | 0 |
| 443-484 | Edgewood | Lumen (Level 3) | VoIP | 0 |
| 443-485 | Elkton | Lumen (Level 3) | VoIP | 0 |
| 443-486 | Lumen (Level 3) | VoIP | 0 | |
| 443-487 | Westminster | Lumen (Level 3) | VoIP | 0 |
| 443-488 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-489 | Chevy Chase | AT&T | VoIP | 0 |
| 443-490 | Edgewood | Bandwidth | VoIP | 0 |
| 443-491 | Parkton | Onvoy (Sinch) | VoIP | 0 |
| 443-492 | Elkridge | Lumen (Level 3) | VoIP | 0 |
| 443-493 | Delmar | Verizon Wireless | Wireless | 0 |
| 443-494 | Millersvl | Bandwidth | VoIP | 0 |
| 443-495 | Parkville | Bandwidth | VoIP | 0 |
| 443-496 | Easton | T-Mobile (Metro) | Wireless | 0 |
| 443-497 | Salisbury | T-Mobile (Metro) | Wireless | 0 |
| 443-498 | Catonsvl | Verizon Business | VoIP | 0 |
| 443-499 | Bandwidth | VoIP | 0 | |
| 443-500 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-501 | Lumen (Level 3) | VoIP | 0 | |
| 443-502 | Havre de Grace | AT&T | VoIP | 0 |
| 443-503 | Dundalk | Verizon Business | VoIP | 0 |
| 443-504 | Fallston | Windstream (PAETEC) | VoIP | 0 |
| 443-505 | Essex | Lumen (Level 3) | VoIP | 0 |
| 443-506 | Baltimore | T-Mobile | Wireless | 0 |
| 443-507 | Hampstead | AT&T | VoIP | 0 |
| 443-508 | Hampstead | Windstream (PAETEC) | VoIP | 0 |
| 443-509 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-510 | Annapolis | Verizon Wireless | Wireless | 0 |
| 443-512 | Edgewood | Verizon | Landline | 0 |
| 443-513 | Berlin | AT&T Mobility | Wireless | 0 |
| 443-514 | Catonsvl | Windstream (PAETEC) | VoIP | 0 |
| 443-515 | Cambridge | Verizon Wireless | Wireless | 0 |
| 443-516 | Sykesville | Onvoy (Sinch) | VoIP | 0 |
| 443-517 | Lumen (Level 3) | VoIP | 0 | |
| 443-518 | Columbia | Verizon | Landline | 0 |
| 443-519 | Towson | Lumen (Level 3) | VoIP | 0 |
| 443-520 | Catonsvl | AT&T Mobility | Wireless | 0 |
| 443-521 | Cambridge | Verizon Wireless | Wireless | 0 |
| 443-522 | Windstream (PAETEC) | VoIP | 0 | |
| 443-523 | Salisbury | Verizon | Landline | 0 |
| 443-524 | Baltimore | Verizon Business | VoIP | 0 |
| 443-525 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-526 | Havre de Grace | Windstream (PAETEC) | VoIP | 0 |
| 443-527 | Baltimore | T-Mobile | Wireless | 0 |
| 443-528 | Bel Air | T-Mobile | Wireless | 0 |
| 443-529 | Baltimore | T-Mobile | Wireless | 0 |
| 443-530 | Dundalk | Windstream (PAETEC) | VoIP | 0 |
| 443-531 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-532 | T-Mobile (Metro) | Wireless | 0 | |
| 443-533 | AT&T | VoIP | 0 | |
| 443-534 | Annapolis | Verizon Wireless | Wireless | 0 |
| 443-535 | Columbia | Verizon | Landline | 0 |
| 443-536 | Westminster | T-Mobile (Metro) | Wireless | 1 |
| 443-537 | Columbia | Verizon Wireless | Wireless | 0 |
| 443-538 | Columbia | T-Mobile | Wireless | 0 |
| 443-539 | Columbia | Windstream (PAETEC) | VoIP | 0 |
| 443-540 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-541 | Cockeysvl | Windstream (PAETEC) | VoIP | 0 |
| 443-542 | Columbia | Comcast (Xfinity) | VoIP | 0 |
| 443-543 | Arbutus | Verizon | Landline | 0 |
| 443-544 | Windstream (PAETEC) | VoIP | 0 | |
| 443-545 | Columbia | Lumen (Level 3) | VoIP | 0 |
| 443-546 | Columbia | Verizon | Landline | 0 |
| 443-547 | Westminster | Verizon Wireless | Wireless | 0 |
| 443-548 | Verizon Business | VoIP | 0 | |
| 443-549 | Dundalk | Windstream (PAETEC) | VoIP | 0 |
| 443-550 | North Beach | Lumen (Level 3) | VoIP | 0 |
| 443-551 | Woodlawn | Lumen (Level 3) | VoIP | 0 |
| 443-552 | Baltimore | Verizon | Landline | 0 |
| 443-553 | Elkton | Verizon Wireless | Wireless | 0 |
| 443-554 | Chevy Chase | T-Mobile | Wireless | 0 |
| 443-556 | Cockeysvl | Verizon | Landline | 0 |
| 443-557 | Verizon Business | VoIP | 0 | |
| 443-558 | Aberdeen | Verizon Business | VoIP | 0 |
| 443-559 | Essex | Comcast (Xfinity) | VoIP | 0 |
| 443-560 | Baltimore | T-Mobile | Wireless | 0 |
| 443-561 | Elkridge | Windstream (PAETEC) | VoIP | 0 |
| 443-562 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-563 | Baltimore | T-Mobile | Wireless | 0 |
| 443-564 | Towson | Lumen (Level 3) | VoIP | 0 |
| 443-565 | Windstream (PAETEC) | VoIP | 0 | |
| 443-566 | Chesapeake City | Verizon Wireless | Wireless | 0 |
| 443-567 | Bel Air | Lumen (Level 3) | VoIP | 0 |
| 443-568 | Arbutus | Verizon Business | VoIP | 0 |
| 443-569 | Annapolis | Lumen (Level 3) | VoIP | 0 |
| 443-570 | Baltimore | T-Mobile | Wireless | 0 |
| 443-571 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-572 | Verizon | Landline | 0 | |
| 443-573 | Baltimore | Windstream (PAETEC) | VoIP | 0 |
| 443-574 | Windstream (PAETEC) | VoIP | 0 | |
| 443-575 | Arbutus | Windstream (PAETEC) | VoIP | 0 |
| 443-576 | Verizon Business | VoIP | 0 | |
| 443-577 | Windstream (PAETEC) | VoIP | 0 | |
| 443-578 | Cockeysvl | Xo Maryland | Landline | 0 |
| 443-579 | Essex | Windstream (PAETEC) | VoIP | 0 |
| 443-580 | Baltimore | T-Mobile | Wireless | 0 |
| 443-581 | Chevy Chase | Onvoy (Sinch) | VoIP | 0 |
| 443-582 | Churchvl | Windstream (PAETEC) | VoIP | 1 |
| 443-583 | Columbia | Windstream (PAETEC) | VoIP | 0 |
| 443-584 | Crofton | Windstream (PAETEC) | VoIP | 0 |
| 443-585 | Windstream (PAETEC) | VoIP | 0 | |
| 443-586 | Dundalk | Core Communications | Landline | 0 |
| 443-587 | Edgewood | Windstream (PAETEC) | VoIP | 0 |
| 443-588 | Parkville | Verizon Business | VoIP | 0 |
| 443-589 | Cockeysvl | Windstream (PAETEC) | VoIP | 0 |
| 443-590 | Lumen (Level 3) | VoIP | 0 | |
| 443-591 | Verizon Wireless | Wireless | 0 | |
| 443-592 | Elkridge | Core Communications | Landline | 0 |
| 443-593 | Elkton | Windstream (PAETEC) | VoIP | 0 |
| 443-594 | Lumen (Level 3) | VoIP | 0 | |
| 443-595 | Bandwidth | VoIP | 0 | |
| 443-596 | Essex | Core Communications | Landline | 0 |
| 443-597 | Severna Pk | T-Mobile (Metro) | Wireless | 0 |
| 443-598 | Sherwd For | Bandwidth | VoIP | 0 |
| 443-599 | Severn | T-Mobile (Metro) | Wireless | 0 |
| 443-600 | Essex | T-Mobile | Wireless | 0 |
| 443-601 | Fallston | Windstream (PAETEC) | VoIP | 0 |
| 443-602 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-603 | Annapolis | Windstream (PAETEC) | VoIP | 0 |
| 443-604 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-605 | Westminster | Windstream (PAETEC) | VoIP | 0 |
| 443-606 | Fork | Windstream (PAETEC) | VoIP | 0 |
| 443-607 | Westminster | Windstream (PAETEC) | VoIP | 0 |
| 443-608 | Towson | AT&T Mobility | Wireless | 0 |
| 443-609 | Sykesville | Windstream (PAETEC) | VoIP | 0 |
| 443-610 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-612 | Catonsvl | Verizon | Landline | 0 |
| 443-613 | Towson | AT&T Mobility | Wireless | 0 |
| 443-614 | Salisbury | Verizon Wireless | Wireless | 0 |
| 443-615 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-616 | Bel Air | Windstream (PAETEC) | VoIP | 0 |
| 443-617 | Fallston | Verizon Wireless | Wireless | 0 |
| 443-618 | Verizon Wireless | Wireless | 0 | |
| 443-619 | Bel Air | Verizon Wireless | Wireless | 0 |
| 443-620 | AT&T | VoIP | 0 | |
| 443-621 | Baltimore | T-Mobile | Wireless | 0 |
| 443-622 | Baltimore | T-Mobile | Wireless | 0 |
| 443-623 | T-Mobile | Wireless | 0 | |
| 443-624 | Verizon Wireless | Wireless | 0 | |
| 443-625 | Fork | Lumen (Level 3) | VoIP | 0 |
| 443-626 | Chevy Chase | Windstream (PAETEC) | VoIP | 0 |
| 443-627 | Baltimore | Lumen (Level 3) | VoIP | 0 |
| 443-628 | Core Communications | Landline | 0 | |
| 443-629 | Baltimore | T-Mobile | Wireless | 0 |
| 443-630 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-631 | Catonsvl | AT&T Mobility | Wireless | 0 |
| 443-632 | Towson | Windstream (PAETEC) | VoIP | 0 |
| 443-633 | Baltimore | T-Mobile | Wireless | 0 |
| 443-634 | Verizon | Landline | 0 | |
| 443-635 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-636 | Catonsvl | T-Mobile | Wireless | 0 |
| 443-637 | Verizon Business | VoIP | 1 | |
| 443-638 | Global Naps South | Landline | 0 | |
| 443-639 | Hampstead | Windstream (PAETEC) | VoIP | 0 |
| 443-640 | Bel Air | Windstream (PAETEC) | VoIP | 0 |
| 443-641 | Lumen (Level 3) | VoIP | 0 | |
| 443-642 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-643 | Bel Air | Verizon | Landline | 0 |
| 443-644 | Windstream (PAETEC) | VoIP | 0 | |
| 443-645 | Millersvl | Windstream (PAETEC) | VoIP | 0 |
| 443-646 | North Beach | Windstream (PAETEC) | VoIP | 0 |
| 443-647 | New Windsor | Windstream (PAETEC) | VoIP | 0 |
| 443-648 | Essex | AT&T | VoIP | 0 |
| 443-649 | Windstream (PAETEC) | VoIP | 0 | |
| 443-650 | Verizon Business | VoIP | 0 | |
| 443-651 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-652 | Towson | T-Mobile | Wireless | 0 |
| 443-653 | Parkville | T-Mobile | Wireless | 0 |
| 443-654 | Verizon | Landline | 0 | |
| 443-655 | Bel Air | AT&T Mobility | Wireless | 0 |
| 443-656 | Columbia | Windstream (PAETEC) | VoIP | 0 |
| 443-657 | Lumen (Level 3) | VoIP | 0 | |
| 443-658 | Woodlawn | Onvoy (Sinch) | VoIP | 0 |
| 443-659 | Westminster | Onvoy (Sinch) | VoIP | 0 |
| 443-660 | Comcast (Xfinity) | VoIP | 0 | |
| 443-661 | Windstream (PAETEC) | VoIP | 0 | |
| 443-662 | Windstream (PAETEC) | VoIP | 0 | |
| 443-663 | Woodlawn | Verizon | Landline | 0 |
| 443-664 | Ocean City | Windstream (PAETEC) | VoIP | 0 |
| 443-665 | Nanticoke | Core Communications | Landline | 0 |
| 443-666 | Chestertown | Lumen (Level 3) | VoIP | 0 |
| 443-667 | Delmar | Verizon Wireless | Wireless | 0 |
| 443-668 | Catonsvl | AT&T Mobility | Wireless | 0 |
| 443-669 | Delmar | Windstream (PAETEC) | VoIP | 0 |
| 443-670 | Catonsvl | Windstream (PAETEC) | VoIP | 0 |
| 443-671 | New Windsor | AT&T | VoIP | 0 |
| 443-672 | Parkton | AT&T | VoIP | 0 |
| 443-673 | Windstream (PAETEC) | VoIP | 0 | |
| 443-674 | North East | AT&T | VoIP | 0 |
| 443-675 | Windstream (PAETEC) | VoIP | 0 | |
| 443-676 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-677 | Baltimore | T-Mobile | Wireless | 0 |
| 443-678 | Parkville | Verizon | Landline | 0 |
| 443-679 | Severn | AT&T | VoIP | 0 |
| 443-680 | Baltimore | T-Mobile | Wireless | 0 |
| 443-681 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-682 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-683 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-684 | Verizon Wireless | Wireless | 0 | |
| 443-685 | Severn | Windstream (PAETEC) | VoIP | 0 |
| 443-686 | Fallston | Verizon Wireless | Wireless | 0 |
| 443-687 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-688 | Severn | Windstream (PAETEC) | VoIP | 0 |
| 443-689 | Cockeysvl | Windstream (PAETEC) | VoIP | 0 |
| 443-690 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-691 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-692 | Baltimore | Verizon Business | VoIP | 0 |
| 443-693 | Perryville | AT&T | VoIP | 0 |
| 443-694 | Severna Pk | T-Mobile (Metro) | Wireless | 0 |
| 443-695 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-696 | Dundalk | Windstream (PAETEC) | VoIP | 0 |
| 443-697 | Catonsvl | Global Naps South | Landline | 0 |
| 443-698 | Odenton | AT&T | VoIP | 0 |
| 443-699 | Annapolis | Verizon Wireless | Wireless | 0 |
| 443-701 | Arbutus | Verizon Business | VoIP | 0 |
| 443-702 | Windstream (PAETEC) | VoIP | 0 | |
| 443-703 | Baltimore | Verizon Business | VoIP | 0 |
| 443-704 | Odenton | Windstream (PAETEC) | VoIP | 0 |
| 443-705 | Cockeysvl | Verizon Wireless | Wireless | 0 |
| 443-706 | Crisfield | Windstream (PAETEC) | VoIP | 0 |
| 443-707 | Aberdeen | T-Mobile | Wireless | 0 |
| 443-708 | Baltimore | Lumen (Level 3) | VoIP | 0 |
| 443-709 | Arbutus | Windstream (PAETEC) | VoIP | 0 |
| 443-710 | Catonsvl | Verizon Business | VoIP | 0 |
| 443-712 | Windstream (PAETEC) | VoIP | 0 | |
| 443-713 | Peerless Network | VoIP | 0 | |
| 443-714 | Annapolis | AT&T Mobility | Wireless | 7 |
| 443-715 | North East | Windstream (PAETEC) | VoIP | 0 |
| 443-716 | Annapolis | Windstream (PAETEC) | VoIP | 0 |
| 443-717 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-718 | Columbia | Windstream (PAETEC) | VoIP | 0 |
| 443-719 | Windstream (PAETEC) | VoIP | 0 | |
| 443-720 | Aberdeen | Verizon Business | VoIP | 0 |
| 443-721 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-722 | Baltimore | T-Mobile | Wireless | 0 |
| 443-723 | Baltimore | T-Mobile | Wireless | 0 |
| 443-724 | Easton | Windstream (PAETEC) | VoIP | 0 |
| 443-725 | Parkville | Windstream (PAETEC) | VoIP | 2 |
| 443-726 | Baltimore | T-Mobile | Wireless | 0 |
| 443-727 | Bishopvl | Windstream (PAETEC) | VoIP | 0 |
| 443-728 | Berlin | Windstream (PAETEC) | VoIP | 0 |
| 443-729 | Woodlawn | Windstream (PAETEC) | VoIP | 0 |
| 443-730 | Essex | Windstream (PAETEC) | VoIP | 0 |
| 443-731 | Port Deposit | AT&T | VoIP | 0 |
| 443-732 | Silver Run | AT&T | VoIP | 0 |
| 443-733 | AT&T | VoIP | 0 | |
| 443-734 | Severn | Verizon | Landline | 0 |
| 443-735 | Salisbury | AT&T Mobility | Wireless | 0 |
| 443-736 | Salisbury | AT&T Mobility | Wireless | 0 |
| 443-737 | Windstream (PAETEC) | VoIP | 0 | |
| 443-738 | Windstream (PAETEC) | VoIP | 0 | |
| 443-739 | Baltimore | T-Mobile | Wireless | 0 |
| 443-740 | Baltimore | Lumen (Level 3) | VoIP | 0 |
| 443-741 | Columbia | Verizon Business | VoIP | 0 |
| 443-742 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-743 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-744 | T-Mobile (Metro) | Wireless | 0 | |
| 443-745 | Columbia | Verizon Wireless | Wireless | 0 |
| 443-746 | Easton | Lumen (Level 3) | VoIP | 0 |
| 443-747 | Port Deposit | Core Communications | Landline | 0 |
| 443-748 | Millersvl | Windstream (PAETEC) | VoIP | 0 |
| 443-749 | Windstream (PAETEC) | VoIP | 0 | |
| 443-750 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-751 | Woodlawn | Windstream (PAETEC) | VoIP | 0 |
| 443-752 | Bel Air | Verizon Wireless | Wireless | 0 |
| 443-753 | Verizon Business | VoIP | 0 | |
| 443-754 | Salisbury | Verizon Wireless | Wireless | 0 |
| 443-755 | Verizon | Landline | 0 | |
| 443-756 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-757 | Elkridge | Windstream (PAETEC) | VoIP | 0 |
| 443-758 | Annapolis | Verizon Wireless | Wireless | 0 |
| 443-759 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-760 | Aberdeen | AT&T | Landline | 0 |
| 443-761 | Towson | T-Mobile | Wireless | 0 |
| 443-762 | Baltimore | T-Mobile | Wireless | 0 |
| 443-763 | T-Mobile | Wireless | 0 | |
| 443-764 | T-Mobile | Wireless | 0 | |
| 443-765 | Catonsvl | AT&T Mobility | Wireless | 0 |
| 443-766 | Columbia | Windstream (PAETEC) | VoIP | 0 |
| 443-767 | Windstream (PAETEC) | VoIP | 0 | |
| 443-768 | Baltimore | T-Mobile | Wireless | 0 |
| 443-769 | Baltimore | T-Mobile | Wireless | 0 |
| 443-770 | Verizon | Landline | 0 | |
| 443-771 | Verizon Wireless | Wireless | 0 | |
| 443-772 | Essex | Windstream (PAETEC) | VoIP | 0 |
| 443-773 | Verizon Business | VoIP | 0 | |
| 443-774 | Columbia | AT&T Mobility | Wireless | 0 |
| 443-775 | Annapolis | Verizon Wireless | Wireless | 0 |
| 443-776 | Elkridge | Bandwidth | VoIP | 0 |
| 443-777 | Essex | Verizon | Landline | 0 |
| 443-778 | Verizon | Landline | 0 | |
| 443-779 | Aberdeen | Verizon Business | VoIP | 0 |
| 443-780 | Woodlawn | Windstream (PAETEC) | VoIP | 0 |
| 443-781 | Onvoy (Sinch) | VoIP | 0 | |
| 443-782 | Annapolis | Verizon Business | VoIP | 0 |
| 443-783 | Salisbury | Verizon Wireless | Wireless | 0 |
| 443-784 | AT&T | VoIP | 0 | |
| 443-785 | Arbutus | Onvoy (Sinch) | VoIP | 0 |
| 443-786 | Easton | Verizon Wireless | Wireless | 0 |
| 443-787 | Bel Air | Windstream (PAETEC) | VoIP | 0 |
| 443-788 | Aberdeen | T-Mobile | Wireless | 0 |
| 443-789 | Westminster | AT&T Mobility | Wireless | 0 |
| 443-790 | T-Mobile | Wireless | 0 | |
| 443-791 | Towson | AT&T Mobility | Wireless | 0 |
| 443-792 | Verizon | Landline | 0 | |
| 443-793 | Parkville | Verizon Business | VoIP | 0 |
| 443-794 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-795 | Severn | Verizon Business | VoIP | 0 |
| 443-796 | Verizon Business | VoIP | 0 | |
| 443-797 | Towson | Verizon Business | VoIP | 0 |
| 443-798 | Towson | Lumen (Level 3) | VoIP | 0 |
| 443-799 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-800 | Baltimore | T-Mobile | Wireless | 0 |
| 443-801 | Baltimore | T-Mobile | Wireless | 0 |
| 443-802 | Baltimore | T-Mobile | Wireless | 0 |
| 443-803 | Baltimore | T-Mobile | Wireless | 0 |
| 443-804 | Baltimore | T-Mobile | Wireless | 0 |
| 443-805 | T-Mobile | Wireless | 0 | |
| 443-806 | Baltimore | T-Mobile | Wireless | 0 |
| 443-807 | Fallston | T-Mobile (Metro) | Wireless | 0 |
| 443-808 | Annapolis | Bandwidth | VoIP | 0 |
| 443-809 | Towson | Lumen (Level 3) | VoIP | 0 |
| 443-810 | Baltimore | T-Mobile | Wireless | 0 |
| 443-812 | Columbia | Verizon Wireless | Wireless | 0 |
| 443-813 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-814 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-815 | Essex | Verizon Business | VoIP | 0 |
| 443-816 | Severna Pk | Verizon Business | VoIP | 0 |
| 443-817 | Verizon Business | VoIP | 0 | |
| 443-818 | Lumen (Level 3) | VoIP | 1 | |
| 443-819 | Bel Air | T-Mobile | Wireless | 0 |
| 443-820 | Elkridge | Windstream (PAETEC) | VoIP | 0 |
| 443-821 | Westminster | T-Mobile (Metro) | Wireless | 0 |
| 443-822 | Annapolis | T-Mobile | Wireless | 0 |
| 443-823 | Towson | Verizon Wireless | Wireless | 0 |
| 443-824 | Towson | T-Mobile | Wireless | 0 |
| 443-825 | Baltimore | T-Mobile | Wireless | 0 |
| 443-826 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-827 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-828 | Windstream (PAETEC) | VoIP | 0 | |
| 443-829 | Baltimore | T-Mobile | Wireless | 0 |
| 443-830 | Catonsvl | Windstream (PAETEC) | VoIP | 0 |
| 443-831 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-832 | Columbia | Lumen (Level 3) | VoIP | 0 |
| 443-833 | Arbutus | Windstream (PAETEC) | VoIP | 0 |
| 443-834 | Towson | Verizon Wireless | Wireless | 0 |
| 443-835 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-836 | Baltimore | Verizon Business | VoIP | 0 |
| 443-837 | Annapolis | Windstream (PAETEC) | VoIP | 0 |
| 443-838 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-839 | Baltimore | T-Mobile | Wireless | 0 |
| 443-840 | Catonsvl | AT&T Mobility | Wireless | 0 |
| 443-841 | Towson | Verizon | Landline | 0 |
| 443-842 | Baltimore | Verizon Wireless | Wireless | 1 |
| 443-843 | Havre de Grace | Verizon | Landline | 0 |
| 443-844 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-845 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-846 | Towson | AT&T Mobility | Wireless | 0 |
| 443-847 | Towson | Verizon Wireless | Wireless | 0 |
| 443-848 | T-Mobile | Wireless | 0 | |
| 443-849 | Towson | Verizon | Landline | 0 |
| 443-850 | Baltimore | T-Mobile | Wireless | 0 |
| 443-851 | Catonsvl | T-Mobile | Wireless | 0 |
| 443-852 | Annapolis | AT&T Mobility | Wireless | 0 |
| 443-853 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-854 | Baltimore | T-Mobile | Wireless | 0 |
| 443-855 | Aberdeen | Windstream (PAETEC) | VoIP | 0 |
| 443-856 | Ocean City | Core Communications | Landline | 0 |
| 443-857 | Baltimore | T-Mobile | Wireless | 0 |
| 443-858 | Baltimore | T-Mobile | Wireless | 0 |
| 443-859 | Salisbury | T-Mobile | Wireless | 0 |
| 443-860 | Catonsvl | AT&T Mobility | Wireless | 0 |
| 443-861 | Aberdeen | Verizon | Landline | 0 |
| 443-862 | Towson | Verizon Wireless | Wireless | 0 |
| 443-863 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-864 | Columbia | T-Mobile (Metro) | Wireless | 0 |
| 443-865 | Baltimore | T-Mobile | Wireless | 0 |
| 443-866 | Bel Air | T-Mobile | Wireless | 0 |
| 443-867 | Windstream (PAETEC) | VoIP | 0 | |
| 443-868 | Essex | Verizon | Landline | 0 |
| 443-869 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-870 | Lumen (Level 3) | VoIP | 0 | |
| 443-871 | Annapolis | T-Mobile | Wireless | 0 |
| 443-872 | Baltimore | Windstream (PAETEC) | VoIP | 0 |
| 443-873 | Baltimore | Onvoy (Sinch) | VoIP | 0 |
| 443-874 | Baltimore | Windstream (PAETEC) | VoIP | 0 |
| 443-875 | Annapolis | AT&T Mobility | Wireless | 0 |
| 443-876 | Bel Air | T-Mobile | Wireless | 0 |
| 443-877 | North East | Lumen (Level 3) | VoIP | 0 |
| 443-878 | Columbia | Verizon Wireless | Wireless | 0 |
| 443-879 | Dundalk | Verizon | Landline | 0 |
| 443-880 | Salisbury | AT&T | VoIP | 0 |
| 443-881 | T-Mobile (Metro) | Wireless | 0 | |
| 443-882 | Baltimore | T-Mobile | Wireless | 0 |
| 443-883 | AT&T | VoIP | 0 | |
| 443-884 | Baltimore | Windstream (PAETEC) | VoIP | 0 |
| 443-885 | Baltimore | Verizon | Landline | 0 |
| 443-886 | Cockeysvl | AT&T | VoIP | 0 |
| 443-887 | Catonsvl | Windstream (PAETEC) | VoIP | 0 |
| 443-888 | Princess Anne | Windstream (PAETEC) | VoIP | 0 |
| 443-889 | T-Mobile | Wireless | 0 | |
| 443-890 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-891 | Verizon Business | VoIP | 0 | |
| 443-892 | New Windsor | Bandwidth | VoIP | 0 |
| 443-893 | Woodlawn | Verizon Business | VoIP | 0 |
| 443-894 | Baltimore | T-Mobile | Wireless | 0 |
| 443-895 | Towson | Verizon Wireless | Wireless | 0 |
| 443-896 | Columbia | AT&T | VoIP | 0 |
| 443-897 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-898 | Lumen (Level 3) | VoIP | 0 | |
| 443-899 | Lumen (Level 3) | VoIP | 0 | |
| 443-900 | Towson | Verizon Wireless | Wireless | 0 |
| 443-901 | Towson | Windstream (PAETEC) | VoIP | 0 |
| 443-902 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-903 | Bel Air | Verizon Wireless | Wireless | 0 |
| 443-904 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-905 | Annapolis | AT&T Mobility | Wireless | 0 |
| 443-906 | Severna Pk | Peerless Network | VoIP | 0 |
| 443-907 | Elkton | Verizon Wireless | Wireless | 0 |
| 443-908 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-909 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-910 | Bel Air | AT&T Mobility | Wireless | 0 |
| 443-912 | Towson | Core Communications | Landline | 0 |
| 443-913 | Baltimore | T-Mobile | Wireless | 0 |
| 443-914 | AT&T | VoIP | 0 | |
| 443-915 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-916 | Baltimore | T-Mobile | Wireless | 0 |
| 443-917 | Columbia | Onvoy (Sinch) | VoIP | 0 |
| 443-918 | Taneytown | AT&T | VoIP | 0 |
| 443-919 | Baltimore | Windstream (PAETEC) | VoIP | 0 |
| 443-920 | Sykesville | AT&T | VoIP | 0 |
| 443-921 | Towson | Windstream (PAETEC) | VoIP | 0 |
| 443-922 | Edgewood | Windstream (PAETEC) | VoIP | 0 |
| 443-923 | Baltimore | Windstream (PAETEC) | VoIP | 0 |
| 443-924 | Annapolis | Verizon Wireless | Wireless | 0 |
| 443-925 | Baltimore | T-Mobile | Wireless | 0 |
| 443-926 | Annapolis | Lumen (Level 3) | VoIP | 0 |
| 443-927 | Baltimore | Lumen (Level 3) | VoIP | 0 |
| 443-928 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-929 | T-Mobile | Wireless | 0 | |
| 443-930 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-931 | Baltimore | Verizon Business | VoIP | 0 |
| 443-932 | Baltimore | T-Mobile | Wireless | 0 |
| 443-933 | Cockeysvl | AT&T | VoIP | 0 |
| 443-934 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-935 | Towson | AT&T Mobility | Wireless | 0 |
| 443-936 | Elkridge | AT&T Mobility | Wireless | 0 |
| 443-937 | Union Bridge | AT&T | VoIP | 0 |
| 443-938 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-939 | Baltimore | T-Mobile | Wireless | 0 |
| 443-940 | Windstream (PAETEC) | VoIP | 0 | |
| 443-941 | Elkton | AT&T Mobility | Wireless | 0 |
| 443-942 | Severna Pk | AT&T | VoIP | 0 |
| 443-943 | AT&T | VoIP | 0 | |
| 443-944 | Salisbury | Comcast (Xfinity) | VoIP | 0 |
| 443-945 | Elkton | AT&T Mobility | Wireless | 0 |
| 443-946 | Parkville | Core Communications | Landline | 0 |
| 443-947 | Perryville | Windstream (PAETEC) | VoIP | 0 |
| 443-948 | Baltimore | T-Mobile | Wireless | 0 |
| 443-949 | Annapolis | Comcast (Xfinity) | VoIP | 0 |
| 443-951 | Annapolis | Lumen (Level 3) | VoIP | 0 |
| 443-952 | Westminster | Verizon Wireless | Wireless | 0 |
| 443-953 | Salisbury | Verizon Wireless | Wireless | 0 |
| 443-954 | Baltimore | Windstream (PAETEC) | VoIP | 0 |
| 443-955 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-956 | Baltimore | AT&T Mobility | Wireless | 0 |
| 443-957 | Baltimore | AT&T | Landline | 0 |
| 443-960 | Verizon Wireless | Wireless | 1 | |
| 443-961 | Baltimore | Intrado Communications | Landline | 0 |
| 443-962 | Verizon Wireless | Wireless | 0 | |
| 443-963 | Baltimore | Bandwidth | VoIP | 0 |
| 443-964 | North Beach | Lumen (Level 3) | VoIP | 0 |
| 443-965 | Baltimore | T-Mobile | Wireless | 0 |
| 443-966 | Fallston | Verizon Wireless | Wireless | 0 |
| 443-967 | North East | Verizon | Landline | 0 |
| 443-968 | AT&T Mobility | Wireless | 0 | |
| 443-969 | Essex | Windstream (PAETEC) | VoIP | 0 |
| 443-970 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-971 | Taneytown | Bandwidth | VoIP | 0 |
| 443-972 | Cambridge | Windstream (PAETEC) | VoIP | 0 |
| 443-973 | Verizon Business | VoIP | 0 | |
| 443-974 | Westminster | AT&T | VoIP | 0 |
| 443-975 | AT&T Mobility | Wireless | 0 | |
| 443-977 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-978 | Salisbury | Verizon Wireless | Wireless | 0 |
| 443-979 | Columbia | Verizon Wireless | Wireless | 0 |
| 443-980 | Catonsvl | AT&T Mobility | Wireless | 0 |
| 443-981 | Fallston | Verizon Wireless | Wireless | 0 |
| 443-982 | Baltimore | YMax (magicJack) | VoIP | 0 |
| 443-983 | Baltimore | T-Mobile | Wireless | 0 |
| 443-984 | Baltimore | Verizon | Landline | 0 |
| 443-985 | T-Mobile | Wireless | 0 | |
| 443-986 | Baltimore | Verizon Wireless | Wireless | 0 |
| 443-987 | Bel Air | Verizon Wireless | Wireless | 0 |
| 443-988 | Centreville | Lumen (Level 3) | VoIP | 0 |
| 443-989 | Windstream (PAETEC) | VoIP | 0 | |
| 443-990 | Baltimore | Bandwidth | VoIP | 0 |
| 443-991 | Towson | Verizon Wireless | Wireless | 0 |
| 443-992 | Baltimore | Lumen (Level 3) | VoIP | 1 |
| 443-993 | Elkton | T-Mobile (Metro) | Wireless | 0 |
| 443-994 | Annapolis | AT&T Mobility | Wireless | 0 |
| 443-995 | Annapolis | AT&T Mobility | Wireless | 0 |
| 443-996 | Catonsvl | AT&T Mobility | Wireless | 0 |
| 443-997 | Baltimore | Verizon | Landline | 0 |
| 443-998 | Parkville | Verizon | Landline | 0 |
Area code 443 questions
Where is area code 443?
Area code 443 is in Maryland. Its biggest rate centers are Baltimore, Annapolis, Towson, Columbia, Catonsvl.
What time zone is area code 443?
Area code 443 is in the Eastern time zone.
Is a call from area code 443 a scam?
An area code alone can't tell you. Scammers use and spoof numbers in every area code. 23 443 numbers have been flagged on ShadyCall. Look up the full number to see its reports and FTC/FCC complaints.
What carriers use area code 443?
Of its 785 exchanges, the most were assigned to Windstream (PAETEC), Verizon Wireless, T-Mobile. Numbers can be ported to any carrier, so the exchange shows the original carrier only.
What area codes overlay 443?
443 shares its area with 410, 667. In an overlay, new numbers get the newer codes and you dial all ten digits.