Connecticut

Area code 203

Area code 203 covers New Haven, Stamford, Bridgeport, Norwalk, Danbury and more in Connecticut, in the Eastern time zone. It has been in service since 1947. It shares its area with 475 (an overlay).

WhereConnecticut

Time zoneEastern

Exchanges784

Flagged numbers1551 complaints

Most reported 203 numbers

(203) 568-1652CautionRobocall / recorded message7 complaints (203) 403-4098CautionRobocall / recorded message4 complaintsCredit card debt (203) 793-0451CautionTelemarketer / sales4 complaintsSolar panels (203) 916-0898Shady callScam or spam text3 complaintsHealth insurance (203) 635-8776Shady callDebt relief / loans3 complaintsBusiness loans (203) 717-9110CautionRobocall / recorded message3 complaintsPolitical (203) 880-9197CautionRobocall / recorded message3 complaints (203) 587-4348CautionScam or spam text3 complaints (203) 303-7281CautionRobocall / recorded message3 complaints (203) 902-4051CautionRobocall / recorded message3 complaints (203) 493-7979CautionTelemarketer / sales3 complaints (203) 902-2758CautionRobocall / recorded message3 complaints (203) 769-9465CautionTelemarketer / sales3 complaintsSolar panels (203) 831-6318CautionTelemarketer / sales3 complaintsSolar panels (203) 210-8229CautionRobocall / recorded message3 complaintsPolitical

Carriers in 203

Frontier338 51%
Verizon Wireless61 9%
AT&T Mobility52 8%
T-Mobile47 7%
AT&T45 7%
Verizon Business41 6%
Lumen (Level 3)41 6%
Windstream (PAETEC)40 6%

Line types

Landline409 52%
Wireless (cell phone)185 24%
VoIP / internet phone180 23%
Pager10 1%

Counted over the exchanges, from the carrier each was assigned to.

Cities in area code 203

New HavenStamfordBridgeportNorwalkDanburyWaterburyGreenwichMeriden

Every 203 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
203-200	New Haven	Bandwidth	VoIP	0
203-201	New Haven	Spok (paging)	Pager	0
203-202	Darien	Cablevision Lightpath	Landline	0
203-203	Greenwich	Onvoy (Sinch)	VoIP	0
203-204	Guilford	AT&T	VoIP	0
203-205	Danbury	Frontier	Landline	0
203-206	Waterbury	AT&T Mobility	Wireless	0
203-207	Danbury	Frontier	Landline	0
203-208	Branford	Comcast (Xfinity)	VoIP	0
203-209	Bridgeport	Verizon Wireless	Wireless	0
203-210	Wilton	Cablevision Lightpath	Landline	1
203-212	Bridgeport	AT&T Mobility	Wireless	0
203-213	Meriden	AT&T Mobility	Wireless	0
203-214	New Haven	AT&T Mobility	Wireless	0
203-215	New Haven	AT&T Mobility	Wireless	0
203-216	Westport	AT&T Mobility	Wireless	0
203-217	Waterbury	AT&T Mobility	Wireless	0
203-218	Bridgeport	AT&T Mobility	Wireless	0
203-219	Stamford	AT&T Mobility	Wireless	0
203-220	Trumbull	Cablevision Lightpath	Landline	0
203-221	Westport	Frontier	Landline	0
203-222	Westport	Frontier	Landline	0
203-223	Stamford	T-Mobile	Wireless	0
203-224	Bridgeport	Frontier	Landline	0
203-225		Frontier	Landline	0
203-226	Westport	Frontier	Landline	0
203-227	Westport	Frontier	Landline	0
203-228	Waterbury	Verizon Wireless	Wireless	0
203-229	Norwalk	Frontier	Landline	0
203-230	New Haven	Frontier	Landline	0
203-231		Verizon Wireless	Wireless	0
203-232	Waterbury	Verizon Wireless	Wireless	0
203-233	Waterbury	Verizon Wireless	Wireless	0
203-234	New Haven	Frontier	Landline	0
203-235	Meriden	Frontier	Landline	0
203-236	Waterbury	Frontier	Landline	0
203-237	Meriden	Frontier	Landline	0
203-238	Meriden	Frontier	Landline	0
203-239	New Haven	Frontier	Landline	0
203-240	Danbury	Verizon Wireless	Wireless	0
203-241	Danbury	Verizon Wireless	Wireless	0
203-242		Cablevision Lightpath	Landline	0
203-243	Bridgeport	T-Mobile	Wireless	0
203-244	Ridgefield	Csc Voice	Landline	0
203-245	Madison	Frontier	Landline	0
203-246	Norwalk	Verizon Wireless	Wireless	0
203-247	Norwalk	Verizon Wireless	Wireless	0
203-248	New Haven	Frontier	Landline	0
203-249	Stamford	Verizon Wireless	Wireless	0
203-250	Cheshire	Frontier	Landline	0
203-251	Stamford	Frontier	Landline	0
203-252	Stamford	Cablevision Lightpath	Landline	0
203-253	Stamford	Verizon Wireless	Wireless	0
203-254	Fairfield	Frontier	Landline	0
203-255	Fairfield	Frontier	Landline	0
203-256	Fairfield	Frontier	Landline	0
203-257	Bridgeport	Verizon Wireless	Wireless	0
203-258	Bridgeport	Verizon Wireless	Wireless	0
203-259	Fairfield	Frontier	Landline	0
203-260	Bridgeport	AT&T Mobility	Wireless	0
203-261	Trumbull	Frontier	Landline	0
203-262	Woodbury	Frontier	Landline	0
203-263	Woodbury	Frontier	Landline	0
203-264	Woodbury	Frontier	Landline	0
203-265	Wallingford	Frontier	Landline	0
203-266	Woodbury	Frontier	Landline	0
203-267	Woodbury	Frontier	Landline	0
203-268	Trumbull	Frontier	Landline	0
203-269	Wallingford	Frontier	Landline	0
203-270	Newtown	Frontier	Landline	0
203-271	Cheshire	Frontier	Landline	0
203-272	Cheshire	Frontier	Landline	0
203-273	Stamford	Verizon Wireless	Wireless	0
203-274	Stamford	AT&T Mobility	Wireless	0
203-275	Bridgeport	Frontier	Landline	0
203-276	Stamford	Cablevision Lightpath	Landline	0
203-277		Verizon Business	VoIP	0
203-278		T-Mobile	Wireless	0
203-279	Bridgeport	Spok (paging)	Pager	0
203-280	Darien	Verizon Business	VoIP	0
203-281	New Haven	Frontier	Landline	0
203-282	Stamford	Spok (paging)	Pager	0
203-283	Milford	Cablevision Lightpath	Landline	0
203-284	Wallingford	Frontier	Landline	0
203-285	New Haven	AT&T	VoIP	0
203-286	Norwalk	Windstream (PAETEC)	VoIP	0
203-287	New Haven	Frontier	Landline	0
203-288	New Haven	Frontier	Landline	0
203-289	Danbury	Spok (paging)	Pager	0
203-290	Bridgeport	T-Mobile	Wireless	0
203-291	Westport	Frontier	Landline	0
203-292	Fairfield	Cablevision Lightpath	Landline	0
203-293	Westport	Verizon Business	VoIP	0
203-294	Wallingford	Frontier	Landline	0
203-295	Norwalk	Verizon Business	VoIP	0
203-296	Bridgeport	Verizon Business	VoIP	0
203-297	Danbury	Verizon Business	VoIP	0
203-298	New Haven	Cablevision Lightpath	Landline	0
203-299	Norwalk	Frontier	Landline	0
203-300	Danbury	T-Mobile	Wireless	0
203-301	Milford	Frontier	Landline	0
203-302	Greenwich	Tc Systems	Landline	0
203-303	Wallingford	AT&T	VoIP	1
203-304	Newtown	AT&T	VoIP	0
203-305		AT&T Mobility	Wireless	0
203-306	Milford	Windstream (PAETEC)	VoIP	0
203-307	Fairfield	Verizon Business	VoIP	0
203-308		Verizon Wireless	Wireless	0
203-309	Darien	T-Mobile (Metro)	Wireless	0
203-310	New Canaan	Verizon Business	VoIP	0
203-312	Danbury	Frontier	Landline	0
203-313	Danbury	Verizon Wireless	Wireless	0
203-314	New Haven	Verizon Wireless	Wireless	0
203-315	Branford	Frontier	Landline	0
203-316	Stamford	Frontier	Landline	0
203-317	Meriden	Frontier	Landline	0
203-318	Madison	Frontier	Landline	0
203-319	Fairfield	Frontier	Landline	0
203-320	Darien	Verizon Business	VoIP	0
203-321	Stamford	Frontier	Landline	0
203-322	Stamford	Frontier	Landline	0
203-323	Stamford	Frontier	Landline	0
203-324	Stamford	Frontier	Landline	0
203-325	Stamford	Frontier	Landline	0
203-326	Stamford	Frontier	Landline	0
203-327	Stamford	Frontier	Landline	0
203-328	Stamford	Frontier	Landline	0
203-329	Stamford	Frontier	Landline	0
203-330	Bridgeport	Frontier	Landline	0
203-331	Bridgeport	Frontier	Landline	0
203-332	Bridgeport	Frontier	Landline	0
203-333	Bridgeport	Frontier	Landline	0
203-334	Bridgeport	Frontier	Landline	0
203-335	Bridgeport	Frontier	Landline	0
203-336	Bridgeport	Frontier	Landline	0
203-337	Bridgeport	Frontier	Landline	0
203-338	Bridgeport	Frontier	Landline	0
203-339	Bridgeport	Frontier	Landline	0
203-340	Greenwich	Cablevision Lightpath	Landline	0
203-341	Westport	Frontier	Landline	0
203-342	Bridgeport	Spok (paging)	Pager	0
203-343		AT&T Mobility	Wireless	0
203-344		Cablevision Lightpath	Landline	0
203-345	Bridgeport	Cablevision Lightpath	Landline	0
203-346	Waterbury	Frontier	Landline	0
203-347	Byram	Lumen (Level 3)	VoIP	0
203-348	Stamford	Frontier	Landline	0
203-349	Westport	AT&T	VoIP	0
203-350	Madison	AT&T	VoIP	0
203-351	Stamford	Frontier	Landline	0
203-352	Stamford	Frontier	Landline	0
203-353	Stamford	Frontier	Landline	0
203-354	Norwalk	Cablevision Lightpath	Landline	0
203-355	Stamford	Cablevision Lightpath	Landline	0
203-356	Stamford	Frontier	Landline	0
203-357	Stamford	Frontier	Landline	0
203-358	Stamford	Frontier	Landline	0
203-359	Stamford	Frontier	Landline	0
203-360	Bridgeport	T-Mobile (Metro)	Wireless	0
203-361	New Haven	Lumen (Level 3)	VoIP	0
203-362	Bridgeport	Frontier	Landline	0
203-363	Stamford	Frontier	Landline	0
203-364	Newtown	Frontier	Landline	0
203-365	Bridgeport	Frontier	Landline	0
203-366	Bridgeport	Frontier	Landline	0
203-367	Bridgeport	Frontier	Landline	0
203-368	Bridgeport	Frontier	Landline	0
203-369		Verizon Business	VoIP	0
203-370	New Haven	American Messaging Services	Landline	0
203-371	Bridgeport	Frontier	Landline	0
203-372	Bridgeport	Frontier	Landline	0
203-373	Bridgeport	Frontier	Landline	0
203-374	Bridgeport	Frontier	Landline	0
203-375	Bridgeport	Frontier	Landline	0
203-376	New Haven	Verizon Wireless	Wireless	0
203-377	Bridgeport	Frontier	Landline	0
203-378	Bridgeport	Frontier	Landline	0
203-379	Meriden	Frontier	Landline	0
203-380	Bridgeport	Frontier	Landline	0
203-381	Bridgeport	Frontier	Landline	0
203-382	Bridgeport	Frontier	Landline	0
203-383	Bridgeport	Frontier	Landline	0
203-384	Bridgeport	Frontier	Landline	0
203-385	Bridgeport	Frontier	Landline	0
203-386	Bridgeport	Frontier	Landline	0
203-387	New Haven	Frontier	Landline	0
203-388	Stamford	Verizon Business	VoIP	0
203-389	New Haven	Frontier	Landline	0
203-390	New Haven	AT&T	VoIP	0
203-391	Stamford	Verizon Business	VoIP	0
203-392	New Haven	Frontier	Landline	0
203-393	New Haven	Frontier	Landline	0
203-394	Bridgeport	Frontier	Landline	0
203-395	Bridgeport	T-Mobile (Metro)	Wireless	0
203-396	Bridgeport	Frontier	Landline	0
203-397	New Haven	Frontier	Landline	0
203-398	Norwalk	Spok (paging)	Pager	0
203-399	Stamford	Verizon Business	VoIP	0
203-400	Trumbull	AT&T Mobility	Wireless	0
203-401	New Haven	Frontier	Landline	0
203-402		Frontier	Landline	0
203-403	Ridgefield	AT&T	VoIP	1
203-404	New Haven	Lumen (Level 3)	VoIP	0
203-405	Woodbury	Windstream (PAETEC)	VoIP	0
203-406	Stamford	Frontier	Landline	0
203-407	New Haven	Frontier	Landline	0
203-408	Redding	Bandwidth	VoIP	0
203-409		AT&T	VoIP	0
203-410	New Haven	T-Mobile	Wireless	0
203-412	New Haven	American Messaging Services	Landline	0
203-413	Greenwich	Windstream (PAETEC)	VoIP	0
203-414	Bridgeport	AT&T Mobility	Wireless	0
203-415	New Haven	AT&T Mobility	Wireless	0
203-416	Bridgeport	Frontier	Landline	0
203-417	Danbury	AT&T Mobility	Wireless	0
203-418	Fairfield	AT&T	VoIP	0
203-419	Waterbury	Frontier	Landline	0
203-420	Meriden	Frontier	Landline	0
203-421	Madison	Frontier	Landline	0
203-422	Greenwich	Verizon	Landline	0
203-423	Wilton	AT&T	VoIP	0
203-424	Darien	T-Mobile (Metro)	Wireless	0
203-425	Stamford	Frontier	Landline	0
203-426	Newtown	Frontier	Landline	0
203-427	Meriden	Verizon Business	VoIP	0
203-428	Stamford	Verizon Business	VoIP	0
203-429	Westport	Verizon Business	VoIP	0
203-430	New Haven	AT&T Mobility	Wireless	0
203-431	Ridgefield	Frontier	Landline	0
203-432	New Haven	Bandwidth	VoIP	0
203-433	Branford	Comcast (Xfinity)	VoIP	0
203-434	Norwalk	T-Mobile	Wireless	0
203-435	New Haven	T-Mobile	Wireless	0
203-436	New Haven	Frontier	Landline	0
203-437	Waterbury	Verizon Business	VoIP	0
203-438	Ridgefield	Frontier	Landline	0
203-439	Cheshire	Comcast (Xfinity)	VoIP	0
203-440	Meriden	Comcast (Xfinity)	VoIP	0
203-441	Wolcott	AT&T	VoIP	0
203-442	New Canaan	AT&T	VoIP	0
203-443	Meriden	Verizon Business	VoIP	0
203-444	New Haven	AT&T Mobility	Wireless	0
203-445	Trumbull	Frontier	Landline	0
203-446		AT&T	VoIP	0
203-447		AT&T	VoIP	0
203-448	Danbury	Verizon Business	VoIP	0
203-449	Bridgeport	T-Mobile (Metro)	Wireless	0
203-450	Bridgeport	Verizon Wireless	Wireless	0
203-451	Westport	AT&T Mobility	Wireless	0
203-452	Trumbull	Frontier	Landline	0
203-453	Guilford	Frontier	Landline	0
203-454	Westport	Frontier	Landline	0
203-455	Bridgeport	Verizon Business	VoIP	0
203-456	Danbury	Verizon Wireless	Wireless	0
203-457	Guilford	Frontier	Landline	0
203-458	Guilford	Frontier	Landline	0
203-459	Trumbull	Frontier	Landline	0
203-460	Danbury	T-Mobile (Metro)	Wireless	0
203-461	Stamford	Frontier	Landline	0
203-462	Stamford	Frontier	Landline	0
203-463	Seymour	AT&T	VoIP	0
203-464	New Haven	Verizon Wireless	Wireless	0
203-465	Waterbury	Frontier	Landline	0
203-466	New Haven	Frontier	Landline	0
203-467	New Haven	Frontier	Landline	0
203-468	New Haven	Frontier	Landline	0
203-469	New Haven	Frontier	Landline	0
203-470	Danbury	Verizon Wireless	Wireless	0
203-471		Frontier	Landline	0
203-472		Frontier	Landline	0
203-473		Frontier	Landline	0
203-474		Frontier	Landline	0
203-476		Frontier	Landline	0
203-477	New Haven	Spok (paging)	Pager	0
203-478		Frontier	Landline	0
203-479	New Haven	Frontier	Landline	0
203-480	Fairfield	Verizon Business	VoIP	0
203-481	Branford	Frontier	Landline	0
203-482	Danbury	AT&T Mobility	Wireless	0
203-483	Branford	Frontier	Landline	0
203-484	Branford	Frontier	Landline	0
203-485	Greenwich	Cablevision Lightpath	Landline	0
203-486	Woodbury	Frontier	Landline	0
203-487	Stamford	Lumen (Level 3)	VoIP	0
203-488	Branford	Frontier	Landline	0
203-489	Greenwich	Cablevision Lightpath	Landline	0
203-490	Naugatuck	AT&T	VoIP	0
203-491	Newtown	Bandwidth	VoIP	0
203-492	New Haven	Frontier	Landline	0
203-493		Lumen (Level 3)	VoIP	1
203-494	New Haven	Verizon Wireless	Wireless	0
203-495	New Haven	Frontier	Landline	0
203-496	Greenwich	T-Mobile (Metro)	Wireless	0
203-497	New Haven	Frontier	Landline	0
203-498	New Haven	Frontier	Landline	0
203-499	New Haven	Frontier	Landline	0
203-500	New Haven	AT&T Mobility	Wireless	0
203-501	Danbury	Verizon Wireless	Wireless	0
203-502	Bridgeport	Frontier	Landline	0
203-503	New Haven	Frontier	Landline	0
203-504	Stamford	Windstream (PAETEC)	VoIP	0
203-505	Norwalk	Verizon Wireless	Wireless	0
203-506	New Haven	AT&T Mobility	Wireless	0
203-507	New Haven	T-Mobile	Wireless	0
203-508	New Haven	Windstream (PAETEC)	VoIP	0
203-509	Waterbury	T-Mobile (Metro)	Wireless	0
203-510	Waterbury	T-Mobile (Metro)	Wireless	0
203-512	Danbury	T-Mobile	Wireless	0
203-513		AT&T	Landline	0
203-514	Meriden	AT&T	VoIP	0
203-515	Norwalk	T-Mobile	Wireless	0
203-516		Lumen (Level 3)	VoIP	0
203-517	Stamford	Lumen (Level 3)	VoIP	0
203-518	Waterbury	AT&T Mobility	Wireless	0
203-519	Waterbury	T-Mobile (Metro)	Wireless	0
203-520	Bridgeport	Verizon Wireless	Wireless	0
203-521	Bridgeport	Verizon Wireless	Wireless	0
203-522	Bridgeport	AT&T Mobility	Wireless	0
203-523	Norwalk	AT&T	VoIP	0
203-524	Stamford	AT&T Mobility	Wireless	0
203-525	Waterbury	AT&T Mobility	Wireless	0
203-526	Bridgeport	T-Mobile (Metro)	Wireless	0
203-527	Waterbury	Frontier	Landline	0
203-528	Waterbury	Lumen (Level 3)	VoIP	0
203-529	Wilton	AT&T	Landline	0
203-530	New Haven	Verizon Wireless	Wireless	0
203-531	Byram	Verizon	Landline	0
203-532	Byram	Verizon	Landline	0
203-533	Guilford	Lumen (Level 3)	VoIP	0
203-534	Bridgeport	Frontier	Landline	0
203-535	New Haven	Comcast (Xfinity)	VoIP	0
203-536	Stamford	Verizon Wireless	Wireless	0
203-537	Meriden	T-Mobile (Metro)	Wireless	0
203-538		Windstream (PAETEC)	VoIP	0
203-539	Stamford	Frontier	Landline	0
203-540	Bridgeport	AT&T Mobility	Wireless	0
203-541	Stamford	Frontier	Landline	0
203-542	Greenwich	AT&T	Landline	0
203-543	Bridgeport	T-Mobile	Wireless	0
203-544		Frontier	Landline	0
203-545	Bridgeport	T-Mobile (Metro)	Wireless	0
203-546	Danbury	AT&T	VoIP	0
203-547	Stamford	Onvoy (Sinch)	VoIP	0
203-548	Stamford	Lumen (Level 3)	VoIP	0
203-549	Bridgeport	Windstream (PAETEC)	VoIP	0
203-550	Stamford	T-Mobile	Wireless	0
203-551	Bridgeport	AT&T	VoIP	0
203-552	Byram	Verizon	Landline	0
203-553	New Haven	Frontier	Landline	0
203-554	Stamford	AT&T Mobility	Wireless	0
203-556	Bridgeport	AT&T Mobility	Wireless	0
203-557	Westport	Cablevision Lightpath	Landline	0
203-558	Waterbury	AT&T Mobility	Wireless	0
203-559	Darien	AT&T	VoIP	0
203-560	Waterbury	AT&T Mobility	Wireless	0
203-561	Stamford	Verizon Wireless	Wireless	0
203-562	New Haven	Frontier	Landline	0
203-563	Wilton	Frontier	Landline	0
203-564	Stamford	AT&T	Landline	0
203-565	Waterbury	T-Mobile (Metro)	Wireless	0
203-566	Stamford	Verizon Business	VoIP	0
203-567		Windstream (PAETEC)	VoIP	0
203-568	Waterbury	Windstream (PAETEC)	VoIP	1
203-569	Stamford	Cablevision Lightpath	Landline	0
203-570	Stamford	T-Mobile	Wireless	0
203-571	Westport	AT&T	Landline	0
203-572	Bridgeport	T-Mobile	Wireless	0
203-573	Waterbury	Frontier	Landline	0
203-574	Waterbury	Frontier	Landline	0
203-575	Waterbury	Frontier	Landline	0
203-576	Bridgeport	Frontier	Landline	0
203-577	Waterbury	Frontier	Landline	0
203-578	Waterbury	Frontier	Landline	0
203-579	Bridgeport	Frontier	Landline	0
203-580	Byram	Peerless Network	VoIP	0
203-581	Bridgeport	Frontier	Landline	0
203-582	New Haven	Frontier	Landline	0
203-583	Bridgeport	Lumen (Level 3)	VoIP	0
203-584	New Haven	Verizon Wireless	Wireless	0
203-585	Stamford	Frontier	Landline	0
203-586	Woodbury	AT&T	VoIP	0
203-587		Csc Voice	Landline	1
203-588	Stamford	Cablevision Lightpath	Landline	0
203-589	New Haven	T-Mobile	Wireless	0
203-590	Trumbull	Lumen (Level 3)	VoIP	0
203-591	Waterbury	Frontier	Landline	0
203-592	Waterbury	AT&T Mobility	Wireless	0
203-593	Norwalk	Spok (paging)	Pager	0
203-594	New Canaan	Cablevision Lightpath	Landline	0
203-595	Stamford	Frontier	Landline	0
203-596	Waterbury	Frontier	Landline	0
203-597	Waterbury	Frontier	Landline	0
203-598	Waterbury	Frontier	Landline	0
203-599	Meriden	Lumen (Level 3)	VoIP	0
203-600	Meriden	T-Mobile (Metro)	Wireless	0
203-601	Trumbull	AT&T	VoIP	0
203-602	Stamford	Frontier	Landline	0
203-603	New Haven	Frontier	Landline	0
203-604	Norwalk	Lumen (Level 3)	VoIP	0
203-605	New Haven	Verizon Wireless	Wireless	0
203-606	New Haven	T-Mobile	Wireless	0
203-607	Stamford	Verizon Business	VoIP	0
203-608	Meriden	Windstream (PAETEC)	VoIP	0
203-609	Stamford	Frontier	Landline	0
203-610	Bridgeport	Windstream (PAETEC)	VoIP	0
203-612	Bridgeport	Lumen (Level 3)	VoIP	0
203-613	Norwalk	T-Mobile (Metro)	Wireless	0
203-614	Stamford	Frontier	Landline	0
203-615	Bridgeport	Frontier	Landline	0
203-616	Danbury	Lumen (Level 3)	VoIP	0
203-617	Danbury	T-Mobile	Wireless	0
203-618	Greenwich	Verizon	Landline	0
203-619	New Haven	Frontier	Landline	0
203-620	Darien	Verizon Business	VoIP	0
203-621	Darien	Windstream (PAETEC)	VoIP	0
203-622	Greenwich	Verizon	Landline	0
203-623	New Haven	Verizon Wireless	Wireless	0
203-624	New Haven	Frontier	Landline	0
203-625	Greenwich	Verizon	Landline	0
203-626	Wallingford	AT&T	Landline	0
203-627	New Haven	T-Mobile	Wireless	0
203-628	Danbury	Cablevision Lightpath	Landline	0
203-629	Greenwich	Verizon	Landline	0
203-630	Meriden	Frontier	Landline	0
203-631	Meriden	AT&T Mobility	Wireless	0
203-632	Naugatuck	Windstream (PAETEC)	VoIP	0
203-633	Wolcott	Lumen (Level 3)	VoIP	0
203-634	Meriden	Frontier	Landline	0
203-635	Westport	Lumen (Level 3)	VoIP	1
203-636	Darien	Verizon Business	VoIP	0
203-637		Frontier	Landline	0
203-638	Trumbull	Windstream (PAETEC)	VoIP	0
203-639	Meriden	Frontier	Landline	0
203-640	New Haven	AT&T Mobility	Wireless	0
203-641	New Haven	Verizon Wireless	Wireless	0
203-642	Norwalk	Verizon Business	VoIP	0
203-643	Branford	Windstream (PAETEC)	VoIP	0
203-644	Norwalk	Verizon Wireless	Wireless	0
203-645	New Haven	AT&T Mobility	Wireless	0
203-646	Branford	Onvoy (Sinch)	VoIP	0
203-647	Milford	Windstream (PAETEC)	VoIP	0
203-648	Danbury	Lumen (Level 3)	VoIP	0
203-649	Cheshire	Windstream (PAETEC)	VoIP	0
203-650	Bridgeport	T-Mobile (Metro)	Wireless	0
203-651	Cheshire	Windstream (PAETEC)	VoIP	0
203-652	New Canaan	Windstream (PAETEC)	VoIP	0
203-653	Stamford	Windstream (PAETEC)	VoIP	0
203-654	New Haven	Frontier	Landline	0
203-655	Darien	Frontier	Landline	0
203-656	Darien	Frontier	Landline	0
203-657	New Haven	American Messaging Services	Landline	0
203-658	Stamford	AT&T	VoIP	0
203-659	Fairfield	Windstream (PAETEC)	VoIP	0
203-660	Byram	Onvoy (Sinch)	VoIP	0
203-661	Greenwich	Verizon	Landline	0
203-662	Darien	Frontier	Landline	0
203-663	Norwalk	Windstream (PAETEC)	VoIP	0
203-664	Redding	Csc Voice	Landline	0
203-665	Wilton	Windstream (PAETEC)	VoIP	0
203-666	Bridgeport	Lumen (Level 3)	VoIP	0
203-667	Stamford	T-Mobile	Wireless	0
203-668	New Haven	T-Mobile	Wireless	0
203-669	Darien	Lumen (Level 3)	VoIP	0
203-670	Fairfield	T-Mobile	Wireless	0
203-671	New Haven	Verizon Wireless	Wireless	0
203-672	New Haven	Windstream (PAETEC)	VoIP	0
203-673	Bridgeport	AT&T	Landline	0
203-674	Stamford	Frontier	Landline	0
203-675	New Haven	T-Mobile	Wireless	0
203-676	New Haven	T-Mobile	Wireless	0
203-677	Wallingford	Frontier	Landline	0
203-678	Wallingford	Windstream (PAETEC)	VoIP	0
203-679	Wallingford	Frontier	Landline	0
203-680	New Haven	Frontier	Landline	0
203-681	Byram	Verizon	Landline	0
203-682	Westport	Windstream (PAETEC)	VoIP	0
203-683	Bridgeport	Windstream (PAETEC)	VoIP	0
203-684	New Haven	T-Mobile (Metro)	Wireless	0
203-685	Bridgeport	T-Mobile	Wireless	0
203-686	Meriden	Frontier	Landline	0
203-687	New Haven	Lumen (Level 3)	VoIP	0
203-688	New Haven	Frontier	Landline	0
203-689	Guilford	AT&T	Landline	0
203-690	Bridgeport	T-Mobile	Wireless	0
203-691	New Haven	Frontier	Landline	0
203-692	Fairfield	Lumen (Level 3)	VoIP	0
203-693	Milford	Cablevision Lightpath	Landline	0
203-694	Meriden	Frontier	Landline	0
203-695	Waterbury	Frontier	Landline	0
203-696	Bridgeport	Frontier	Landline	0
203-697	Wallingford	Frontier	Landline	0
203-698		Frontier	Landline	0
203-699	Cheshire	Frontier	Landline	0
203-701	Milford	AT&T	Landline	0
203-702	Danbury	Windstream (PAETEC)	VoIP	0
203-703	Stamford	Frontier	Landline	0
203-704	Wolcott	Lumen (Level 3)	VoIP	0
203-705	Stamford	Verizon Business	VoIP	0
203-706	Waterbury	Windstream (PAETEC)	VoIP	0
203-707	Waterbury	Verizon Wireless	Wireless	0
203-708	Stamford	Frontier	Landline	0
203-709	Waterbury	Frontier	Landline	0
203-710	New Haven	AT&T Mobility	Wireless	0
203-712		Lumen (Level 3)	VoIP	0
203-713	Milford	Onvoy (Sinch)	VoIP	0
203-714	Naugatuck	Onvoy (Sinch)	VoIP	0
203-715	Meriden	T-Mobile	Wireless	0
203-716	New Canaan	Lumen (Level 3)	VoIP	0
203-717	Greenwich	Csc Voice	Landline	1
203-718	Cheshire	Lumen (Level 3)	VoIP	0
203-719	Stamford	Verizon Business	VoIP	0
203-720	Naugatuck	Frontier	Landline	0
203-721	Waterbury	Verizon Wireless	Wireless	0
203-722	Norwalk	AT&T Mobility	Wireless	0
203-723	Naugatuck	Frontier	Landline	0
203-724	Stamford	Windstream (PAETEC)	VoIP	0
203-725	Waterbury	Comcast (Xfinity)	VoIP	0
203-726	Bridgeport	Verizon Wireless	Wireless	0
203-727	Bridgeport	T-Mobile	Wireless	0
203-728	Stamford	Frontier	Landline	0
203-729	Naugatuck	Frontier	Landline	0
203-730	Danbury	Frontier	Landline	0
203-731	Danbury	Frontier	Landline	0
203-732		Frontier	Landline	0
203-733	Danbury	Verizon Wireless	Wireless	0
203-734		Frontier	Landline	0
203-735		Frontier	Landline	0
203-736		Frontier	Landline	0
203-737	New Haven	Frontier	Landline	0
203-738	Guilford	Windstream (PAETEC)	VoIP	0
203-739	Danbury	Frontier	Landline	0
203-740	Danbury	Frontier	Landline	0
203-741	Wallingford	Frontier	Landline	0
203-742	Greenwich	Verizon Business	VoIP	0
203-743	Danbury	Frontier	Landline	0
203-744	Danbury	Frontier	Landline	0
203-745	New Haven	Frontier	Landline	0
203-746	Danbury	Frontier	Landline	0
203-747	New Haven	AT&T	VoIP	0
203-748	Danbury	Frontier	Landline	0
203-749	Danbury	Frontier	Landline	0
203-750	Norwalk	Frontier	Landline	0
203-751		Frontier	Landline	0
203-752	New Haven	Frontier	Landline	0
203-753	Waterbury	Frontier	Landline	0
203-754	Waterbury	Frontier	Landline	0
203-755	Waterbury	Frontier	Landline	0
203-756	Waterbury	Frontier	Landline	0
203-757	Waterbury	Frontier	Landline	0
203-758	Waterbury	Frontier	Landline	0
203-759	Waterbury	Frontier	Landline	0
203-760	Bridgeport	Peerless Network	VoIP	0
203-761	Wilton	Frontier	Landline	0
203-762	Wilton	Frontier	Landline	0
203-763	Fairfield	Lumen (Level 3)	VoIP	0
203-764	New Haven	Frontier	Landline	0
203-765	New Haven	Frontier	Landline	0
203-766	New Haven	American Messaging Services	Landline	0
203-767	Bridgeport	Verizon Wireless	Wireless	0
203-768	Waterbury	T-Mobile	Wireless	0
203-769	Greenwich	Verizon	Landline	1
203-770	Danbury	AT&T Mobility	Wireless	0
203-771	New Haven	Frontier	Landline	0
203-772	New Haven	Frontier	Landline	0
203-773	New Haven	Frontier	Landline	0
203-774	Wallingford	Windstream (PAETEC)	VoIP	0
203-775	Danbury	Frontier	Landline	0
203-776	New Haven	Frontier	Landline	0
203-777	New Haven	Frontier	Landline	0
203-778	Danbury	Frontier	Landline	0
203-779	Madison	Windstream (PAETEC)	VoIP	0
203-780	New Haven	Peerless Network	VoIP	0
203-781	New Haven	Frontier	Landline	0
203-782	New Haven	Frontier	Landline	0
203-783	Milford	Frontier	Landline	0
203-784	New Haven	Frontier	Landline	0
203-785	New Haven	Frontier	Landline	0
203-786	New Haven	Frontier	Landline	0
203-787	New Haven	Frontier	Landline	0
203-788	Danbury	AT&T Mobility	Wireless	0
203-789	New Haven	Frontier	Landline	0
203-790	Danbury	Frontier	Landline	0
203-791	Danbury	Frontier	Landline	0
203-792	Danbury	Frontier	Landline	0
203-793	Wallingford	Lumen (Level 3)	VoIP	1
203-794	Danbury	Frontier	Landline	0
203-795	New Haven	Frontier	Landline	0
203-796	Danbury	Frontier	Landline	0
203-797	Danbury	Frontier	Landline	0
203-798	Danbury	Frontier	Landline	0
203-799	New Haven	Frontier	Landline	0
203-800	New Haven	T-Mobile	Wireless	0
203-801	New Canaan	Frontier	Landline	0
203-802	Waterbury	T-Mobile (Metro)	Wireless	0
203-803	Norwalk	Verizon Wireless	Wireless	0
203-804	New Haven	AT&T Mobility	Wireless	0
203-805	Waterbury	AT&T	VoIP	0
203-806	Cheshire	AT&T	VoIP	0
203-807	Norwalk	AT&T Mobility	Wireless	0
203-808	Waterbury	T-Mobile	Wireless	0
203-809	New Haven	T-Mobile	Wireless	0
203-810	Norwalk	Cablevision Lightpath	Landline	0
203-812	New Haven	Frontier	Landline	0
203-813	Byram	Tc Systems	Landline	0
203-814	Bridgeport	Verizon Wireless	Wireless	0
203-815	New Haven	Verizon Wireless	Wireless	0
203-816	Trumbull	Lumen (Level 3)	VoIP	0
203-817	Stamford	Cablevision Lightpath	Landline	0
203-818	Norwalk	Verizon Business	VoIP	0
203-819	Waterbury	AT&T Mobility	Wireless	0
203-820	Norwalk	T-Mobile (Metro)	Wireless	0
203-821	New Haven	Frontier	Landline	0
203-822	Norwalk	AT&T	Landline	0
203-823	New Haven	Comcast (Xfinity)	VoIP	0
203-824	New Haven	AT&T Mobility	Wireless	0
203-825	Danbury	Frontier	Landline	0
203-826	Danbury	Frontier	Landline	0
203-827		Verizon Business	VoIP	0
203-828	Seymour	Lumen (Level 3)	VoIP	0
203-829	Norwalk	T-Mobile	Wireless	0
203-830	Danbury	Frontier	Landline	0
203-831	Norwalk	Frontier	Landline	1
203-832	Stamford	AT&T Mobility	Wireless	0
203-833	New Haven	Verizon Wireless	Wireless	0
203-834	Wilton	Frontier	Landline	0
203-835	Norwalk	Spok (paging)	Pager	0
203-836	New Haven	Verizon Wireless	Wireless	0
203-837	Danbury	Frontier	Landline	0
203-838	Norwalk	Frontier	Landline	0
203-839	Norwalk	Spok (paging)	Pager	0
203-840	Norwalk	Frontier	Landline	0
203-841	Waterbury	Windstream (PAETEC)	VoIP	0
203-842	Norwalk	Lumen (Level 3)	VoIP	0
203-843	New Haven	AT&T Mobility	Wireless	0
203-844	Fairfield	Verizon Business	VoIP	0
203-845	Norwalk	Frontier	Landline	0
203-846	Norwalk	Frontier	Landline	0
203-847	Norwalk	Frontier	Landline	0
203-848	New Haven	Windstream (PAETEC)	VoIP	0
203-849	Norwalk	Frontier	Landline	0
203-850	New Haven	T-Mobile (Metro)	Wireless	0
203-851	Norwalk	Frontier	Landline	0
203-852	Norwalk	Frontier	Landline	0
203-853	Norwalk	Frontier	Landline	0
203-854	Norwalk	Frontier	Landline	0
203-855	Norwalk	Frontier	Landline	0
203-856	Norwalk	Verizon Wireless	Wireless	0
203-857	Norwalk	Frontier	Landline	0
203-858	Norwalk	Verizon Wireless	Wireless	0
203-859	New Haven	Verizon Business	VoIP	0
203-861	Greenwich	Verizon	Landline	0
203-862	Greenwich	Verizon	Landline	0
203-863	Greenwich	Verizon	Landline	0
203-864	Bridgeport	T-Mobile (Metro)	Wireless	0
203-865	New Haven	Frontier	Landline	0
203-866	Norwalk	Frontier	Landline	0
203-867	New Haven	Frontier	Landline	0
203-868	New Haven	AT&T	Landline	0
203-869	Greenwich	Verizon	Landline	0
203-870	Bridgeport	Cablevision Lightpath	Landline	0
203-871	Branford	AT&T	VoIP	0
203-872	Cheshire	Bandwidth	VoIP	0
203-873	Bridgeport	AT&T Mobility	Wireless	0
203-874	Milford	Frontier	Landline	0
203-875	Darien	AT&T	Landline	0
203-876	Milford	Frontier	Landline	0
203-877	Milford	Frontier	Landline	0
203-878	Milford	Frontier	Landline	0
203-879	Wolcott	Frontier	Landline	0
203-880	Trumbull	AT&T	VoIP	1
203-881	Seymour	Frontier	Landline	0
203-882	Milford	Frontier	Landline	0
203-883	Stamford	Lumen (Level 3)	VoIP	0
203-884	Guilford	Onvoy (Sinch)	VoIP	0
203-885	Danbury	Verizon Wireless	Wireless	0
203-886	Meriden	Windstream (PAETEC)	VoIP	0
203-887	New Haven	T-Mobile	Wireless	0
203-888	Seymour	Frontier	Landline	0
203-889	New Haven	Lumen (Level 3)	VoIP	0
203-890	Stamford	Frontier	Landline	0
203-891	New Haven	Frontier	Landline	0
203-892		T-Mobile	Wireless	0
203-893		Verizon Wireless	Wireless	0
203-894	Ridgefield	Frontier	Landline	0
203-895	Trumbull	AT&T Mobility	Wireless	0
203-896	Madison	Peerless Network	VoIP	0
203-897	Stamford	Verizon Business	VoIP	0
203-898	Darien	Verizon Business	VoIP	0
203-899	Norwalk	Frontier	Landline	0
203-900	Greenwich	Csc Voice	Landline	0
203-901	New Haven	T-Mobile	Wireless	0
203-902	New Haven	Onvoy (Sinch)	VoIP	2
203-903	New Haven	Lumen (Level 3)	VoIP	0
203-904	Norwalk	T-Mobile	Wireless	0
203-905	Stamford	AT&T	VoIP	0
203-906		Verizon Wireless	Wireless	0
203-907	New Haven	Windstream (PAETEC)	VoIP	0
203-908	Bridgeport	T-Mobile	Wireless	0
203-909	New Haven	Verizon Wireless	Wireless	0
203-910	Waterbury	Verizon Wireless	Wireless	0
203-912	Stamford	Verizon Wireless	Wireless	0
203-913	Bridgeport	Verizon Wireless	Wireless	0
203-914	Stamford	Csc Voice	Landline	0
203-915	New Haven	Verizon Wireless	Wireless	0
203-916	Bridgeport	Lumen (Level 3)	VoIP	1
203-917	Danbury	Verizon Wireless	Wireless	0
203-918	Stamford	AT&T Mobility	Wireless	0
203-919	Norwalk	T-Mobile	Wireless	0
203-920	New Canaan	Verizon Business	VoIP	0
203-921	Stamford	Frontier	Landline	0
203-922		Frontier	Landline	0
203-923	Bridgeport	Verizon Business	VoIP	0
203-924		Frontier	Landline	0
203-925		Frontier	Landline	0
203-926		Frontier	Landline	0
203-927	New Haven	Verizon Wireless	Wireless	0
203-928	New Haven	Frontier	Landline	0
203-929		Frontier	Landline	0
203-930	Greenwich	Lumen (Level 3)	VoIP	0
203-931	New Haven	Frontier	Landline	0
203-932	New Haven	Frontier	Landline	0
203-933	New Haven	Frontier	Landline	0
203-934	New Haven	Frontier	Landline	0
203-935	Meriden	Lumen (Level 3)	VoIP	0
203-936	New Haven	Frontier	Landline	0
203-937	New Haven	Frontier	Landline	0
203-938	Redding	Frontier	Landline	0
203-939	Norwalk	Csc Voice	Landline	0
203-940	Stamford	Frontier	Landline	0
203-941	Seymour	Bandwidth	VoIP	0
203-942	Danbury	T-Mobile	Wireless	0
203-943	Norwalk	T-Mobile	Wireless	0
203-944		Frontier	Landline	0
203-945	Norwalk	Frontier	Landline	0
203-946	New Haven	Frontier	Landline	0
203-947	Danbury	AT&T Mobility	Wireless	0
203-948	Danbury	T-Mobile	Wireless	0
203-949	Wallingford	Frontier	Landline	0
203-951	Milford	AT&T	VoIP	0
203-952	Norwalk	T-Mobile (Metro)	Wireless	0
203-953	Bridgeport	T-Mobile	Wireless	0
203-954		Windstream (PAETEC)	VoIP	0
203-955	Fairfield	Verizon Business	VoIP	0
203-956	Norwalk	Cablevision Lightpath	Landline	0
203-957	Norwalk	Csc Voice	Landline	0
203-960	Stamford	Cablevision Lightpath	Landline	0
203-961	Stamford	Frontier	Landline	0
203-962	Stamford	Frontier	Landline	0
203-963	Norwalk	Frontier	Landline	0
203-964	Stamford	Frontier	Landline	0
203-965	Stamford	Frontier	Landline	0
203-966	New Canaan	Frontier	Landline	0
203-967	Stamford	Frontier	Landline	0
203-968	Stamford	Frontier	Landline	0
203-969	Stamford	Frontier	Landline	0
203-970	Norwalk	Cablevision Lightpath	Landline	0
203-971	Greenwich	Cablevision Lightpath	Landline	0
203-972	New Canaan	Frontier	Landline	0
203-973	Stamford	Frontier	Landline	0
203-974	New Haven	AT&T	VoIP	0
203-975	Stamford	Frontier	Landline	0
203-977	Stamford	Frontier	Landline	0
203-978	Stamford	Frontier	Landline	0
203-979	Stamford	AT&T Mobility	Wireless	0
203-980	New Haven	Verizon Wireless	Wireless	0
203-981	Norwalk	T-Mobile (Metro)	Wireless	0
203-982	Waterbury	T-Mobile (Metro)	Wireless	0
203-983	Greenwich	Windstream (PAETEC)	VoIP	0
203-984	Norwalk	Verizon Wireless	Wireless	0
203-985	New Haven	Frontier	Landline	0
203-986		Verizon Business	VoIP	0
203-987	Greenwich	Lumen (Level 3)	VoIP	0
203-988	New Haven	AT&T Mobility	Wireless	0
203-989	Stamford	Lumen (Level 3)	VoIP	0
203-990		Verizon Business	VoIP	0
203-991	Norwalk	Frontier	Landline	0
203-992	Greenwich	Csc Voice	Landline	0
203-993	Bridgeport	Verizon Wireless	Wireless	0
203-994	Danbury	T-Mobile	Wireless	0
203-995	Bridgeport	Verizon Business	VoIP	0
203-996	New Haven	T-Mobile	Wireless	0
203-997		T-Mobile	Wireless	0
203-998	Stamford	Lumen (Level 3)	VoIP	0
203-999	New Haven	T-Mobile	Wireless	0

Area code 203 questions

Where is area code 203?

Area code 203 is in Connecticut. Its biggest rate centers are New Haven, Stamford, Bridgeport, Norwalk, Danbury.

What time zone is area code 203?

Area code 203 is in the Eastern time zone.

Is a call from area code 203 a scam?

An area code alone can't tell you. Scammers use and spoof numbers in every area code. 15 203 numbers have been flagged on ShadyCall. Look up the full number to see its reports and FTC/FCC complaints.

What carriers use area code 203?

Of its 784 exchanges, the most were assigned to Frontier, Verizon Wireless, AT&T Mobility. Numbers can be ported to any carrier, so the exchange shows the original carrier only.

What area codes overlay 203?

203 shares its area with 475. In an overlay, new numbers get the newer codes and you dial all ten digits.