Phone numbers in Grafton, Massachusetts
Grafton has 9 phone prefixes in area codes 508, 774.
Biggest holders: Verizon Wireless, Verizon (local phone), Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 33%
- Local phone company 22%
- Internet / business phone carrier 44%
Every prefix in Grafton
Search the first six digits of a number in this list. If it's here, the number started in Grafton with the carrier shown. If it isn't, check the Massachusetts page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 508-320 | Verizon Wireless | Mobile carrier | – |
| 508-839 | Verizon (local phone) | Local phone company | – |
| 508-887 | Verizon (local phone) | Local phone company | – |
| 774-293 | Verizon Wireless | Mobile carrier | 2004 |
| 774-514 | Onvoy | Internet / business phone carrier | 2021 |
| 774-545 | Verizon Wireless | Mobile carrier | 2007 |
| 774-551 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 774-566 | Commio | Internet / business phone carrier | 2023 |
| 774-666 | Onvoy | Internet / business phone carrier | – |
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.