Phone numbers in Plymouth, New Hampshire
Plymouth has 10 phone prefixes in area code 603.
Biggest holders: Windstream (PAETEC), UScellular, Hd Carrier. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 40%
- Local phone company 10%
- Internet / business phone carrier 40%
- Phone company 10%
Every prefix in Plymouth
Search the first six digits of a number in this list. If it's here, the number started in Plymouth with the carrier shown. If it isn't, check the New Hampshire page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 603-238 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 603-254 | UScellular | Mobile carrier | – |
| 603-346 | Hd Carrier | Internet / business phone carrier | – |
| 603-412 | UScellular | Mobile carrier | – |
| 603-481 | Bell Atlantic Mobile | Mobile carrier | – |
| 603-535 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 603-536 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-779 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 603-947 | Freedom Ring Communications | Phone company | – |
| 603-996 | MetroPCS (T-Mobile) | 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.