Phone numbers in Colebrook, New Hampshire
Colebrook has 4 phone prefixes in area code 603.
Biggest holders: Consolidated Comm Of No. New England-nh, Level 3 (Lumen), Freedom Ring Communications. 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 Colebrook
Search the first six digits of a number in this list. If it's here, the number started in Colebrook with the carrier shown. If it isn't, check the New Hampshire page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 603-237 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-331 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 603-388 | Freedom Ring Communications | Phone company | – |
| 603-613 | MCImetro (Verizon Business) | 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.