Phone numbers in Seabrook, New Hampshire
Seabrook has 4 phone prefixes in area code 603.
Biggest holders: Freedom Ring Communications, Consolidated Comm Of No. New England-nh, Teleport Communications America. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 25%
- Internet / business phone carrier 50%
- Phone company 25%
Every prefix in Seabrook
Search the first six digits of a number in this list. If it's here, the number started in Seabrook with the carrier shown. If it isn't, check the New Hampshire page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 603-468 | Freedom Ring Communications | Phone company | – |
| 603-474 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-760 | Teleport Communications America | Internet / business phone carrier | 2002 |
| 603-814 | Comcast | Internet / business phone carrier | 2010 |
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.