Phone numbers in Cohasset, Massachusetts
Cohasset has 7 phone prefixes in area codes 339, 781.
Biggest holders: Level 3 (Lumen), Fractel, Windstream (PAETEC). This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 14%
- Internet / business phone carrier 71%
- Phone company 14%
Every prefix in Cohasset
Search the first six digits of a number in this list. If it's here, the number started in Cohasset with the carrier shown. If it isn't, check the Massachusetts page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 339-300 | Fractel | Internet / business phone carrier | 2020 |
| 339-337 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 781-210 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 781-236 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 781-383 | Verizon (local phone) | Local phone company | – |
| 781-527 | Tc Systems | Phone company | – |
| 781-923 | Comcast | 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.