Exchange · Maryland
(301) 558-xxxx
Every number from 301-558-0000 to 301-558-9999. NANPA records the exchange as assigned to T-Mobile for Maryland in 2025. Robocall and scam operations often use many numbers from one exchange, so if one number here is a shady call, its neighbors deserve a second look.
Reported numbers starting 301-558
| Number | Verdict | What it is | Reports | Complaints |
|---|---|---|---|---|
| (301) 558-1743 | Shady call | Scam or spam text | 0 | 8 |
About the 301-558 exchange
301-558 is an exchange (the first six digits of a phone number) in area code 301, which covers Maryland. NANPA, which runs the North American Numbering Plan, assigned it to T-Mobile for the Maryland rate center in 2025. Numbers from this carrier are usually wireless (cell phone) lines.
People keep their number when they move or switch carrier, so this is where the number was first assigned, not where the caller is today. Local time for 301-558 numbers is usually Eastern time. Scammers can also fake (spoof) any number, so a call that shows a 301-558 number may not come from T-Mobile at all.