Phone numbers in Durham, New Hampshire
Durham has 7 phone prefixes in area code 603.
Biggest holders: Windstream (PAETEC), Comcast, Freedom Ring Communications. 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 Durham
Search the first six digits of a number in this list. If it's here, the number started in Durham with the carrier shown. If it isn't, check the New Hampshire page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 603-295 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 603-389 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 603-397 | Comcast | Internet / business phone carrier | – |
| 603-590 | Freedom Ring Communications | Phone company | – |
| 603-815 | Teleport Communications America | Internet / business phone carrier | 2007 |
| 603-862 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 603-868 | Consolidated Comm Of No. New England-nh | Local phone company | – |
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.