Phone numbers in Somersworth, New Hampshire
Somersworth has 3 phone prefixes in area code 603.
Biggest holders: Teleport Communications America, Consolidated Comm Of No. New England-nh, Comcast. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 33%
- Internet / business phone carrier 67%
Every prefix in Somersworth
Search the first six digits of a number in this list. If it's here, the number started in Somersworth with the carrier shown. If it isn't, check the New Hampshire page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 603-405 | Teleport Communications America | Internet / business phone carrier | 2016 |
| 603-692 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-841 | 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.