Phone numbers in Lancaster, New Hampshire
Lancaster has 5 phone prefixes in area code 603.
Biggest holders: MCImetro (Verizon Business), UScellular, Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 20%
- Local phone company 20%
- Internet / business phone carrier 40%
- Phone company 20%
Every prefix in Lancaster
Search the first six digits of a number in this list. If it's here, the number started in Lancaster with the carrier shown. If it isn't, check the New Hampshire page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 603-503 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 603-631 | UScellular | Mobile carrier | 2002 |
| 603-684 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 603-754 | Freedom Ring Communications | Phone company | – |
| 603-788 | 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.