Phone numbers in Chestertown, Maryland
Chestertown has 10 phone prefixes in area codes 410, 443, 667.
Biggest holders: T-Mobile (including Sprint), Verizon Wireless, Verizon (local phone). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 50%
- Local phone company 20%
- Internet / business phone carrier 30%
Every prefix in Chestertown
Search the first six digits of a number in this list. If it's here, the number started in Chestertown with the carrier shown. If it isn't, check the Maryland page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 410-699 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 410-708 | Verizon Wireless | Mobile carrier | – |
| 410-778 | Verizon (local phone) | Local phone company | – |
| 410-810 | Verizon (local phone) | Local phone company | – |
| 443-215 | Core Communications | Internet / business phone carrier | – |
| 443-282 | MetroPCS (T-Mobile) | Mobile carrier | 2004 |
| 443-480 | Verizon Wireless | Mobile carrier | – |
| 443-666 | Level 3 (Lumen) | Internet / business phone carrier | 2012 |
| 667-254 | Core Communications | Internet / business phone carrier | – |
| 667-319 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.