Phone numbers in Chatham, Massachusetts
Chatham has 7 phone prefixes in area codes 508, 774.
Biggest holders: AT&T Mobility, Comcast, Windstream (PAETEC). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 29%
- Local phone company 14%
- Internet / business phone carrier 57%
Every prefix in Chatham
Search the first six digits of a number in this list. If it's here, the number started in Chatham with the carrier shown. If it isn't, check the Massachusetts page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 508-241 | AT&T Mobility | Mobile carrier | – |
| 508-348 | Comcast | Internet / business phone carrier | – |
| 508-469 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 508-593 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 508-945 | Verizon (local phone) | Local phone company | – |
| 774-734 | Onvoy | Internet / business phone carrier | 2021 |
| 774-840 | AT&T Mobility | Mobile carrier | 2002 |
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.