Phone numbers in Nashua, New Hampshire
Nashua has 58 phone prefixes in area code 603.
Biggest holders: Consolidated Comm Of No. New England-nh, Bell Atlantic Mobile, T-Mobile (including Sprint). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 36%
- Local phone company 43%
- Internet / business phone carrier 19%
- Phone company 2%
Every prefix in Nashua
Search the first six digits of a number in this list. If it's here, the number started in Nashua with the carrier shown. If it isn't, check the New Hampshire page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 603-204 | UScellular | Mobile carrier | – |
| 603-221 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-233 | T-Mobile (including Sprint) | Mobile carrier | – |
| 603-281 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-288 | Vonage America | Internet / business phone carrier | 2017 |
| 603-305 | Bell Atlantic Mobile | Mobile carrier | 2001 |
| 603-318 | Bell Atlantic Mobile | Mobile carrier | – |
| 603-320 | AT&T Mobility | Mobile carrier | – |
| 603-321 | Bell Atlantic Mobile | Mobile carrier | – |
| 603-324 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 603-402 | Bell Atlantic Mobile | Mobile carrier | 2012 |
| 603-417 | T-Mobile (including Sprint) | Mobile carrier | 2015 |
| 603-438 | T-Mobile (including Sprint) | Mobile carrier | – |
| 603-459 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 603-484 | Bell Atlantic Mobile | Mobile carrier | 2016 |
| 603-514 | Bell Atlantic Mobile | Mobile carrier | 2021 |
| 603-521 | AT&T (local phone) | Local phone company | – |
| 603-546 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 603-557 | T-Mobile (including Sprint) | Mobile carrier | – |
| 603-561 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-566 | Bell Atlantic Mobile | Mobile carrier | – |
| 603-577 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-578 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-579 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-589 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 603-594 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-595 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-596 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-598 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-599 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-689 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 603-699 | Nuso | Internet / business phone carrier | – |
| 603-713 | Onvoy | Internet / business phone carrier | 2022 |
| 603-718 | Bell Atlantic Mobile | Mobile carrier | 2009 |
| 603-759 | Bell Atlantic Mobile | Mobile carrier | – |
| 603-765 | T-Mobile (including Sprint) | Mobile carrier | – |
| 603-791 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-809 | Bell Atlantic Mobile | Mobile carrier | 2007 |
| 603-810 | Telnyx | Internet / business phone carrier | 2021 |
| 603-816 | Freedom Ring Communications | Phone company | – |
| 603-821 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 603-864 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-879 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-880 | Telnyx | Internet / business phone carrier | – |
| 603-881 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-882 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-883 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-884 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-885 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-886 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-888 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-889 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-891 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-897 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-921 | Bell Atlantic Mobile | Mobile carrier | 2009 |
| 603-930 | AT&T Mobility | Mobile carrier | – |
| 603-943 | T-Mobile (including Sprint) | Mobile carrier | – |
| 603-966 | T-Mobile (including Sprint) | 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.