Phone numbers in Concord, New Hampshire
Concord has 39 phone prefixes in area code 603.
Biggest holders: Consolidated Comm Of No. New England-nh, T-Mobile (including Sprint), Windstream (PAETEC). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 41%
- Local phone company 23%
- Internet / business phone carrier 33%
- Phone company 3%
Every prefix in Concord
Search the first six digits of a number in this list. If it's here, the number started in Concord with the carrier shown. If it isn't, check the New Hampshire page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 603-202 | T-Mobile (including Sprint) | Mobile carrier | 2023 |
| 603-219 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 603-223 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-224 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-225 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-226 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-227 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-228 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-229 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-230 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-271 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-290 | UScellular | Mobile carrier | – |
| 603-333 | Peerless Network Of New Hampshire | Internet / business phone carrier | – |
| 603-369 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 603-406 | T-Mobile (including Sprint) | Mobile carrier | 2018 |
| 603-410 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 603-415 | Freedom Ring Communications | Phone company | – |
| 603-450 | T-Mobile (including Sprint) | Mobile carrier | 2018 |
| 603-451 | AT&T Mobility | Mobile carrier | 2020 |
| 603-470 | UScellular | Mobile carrier | 2001 |
| 603-491 | Bell Atlantic Mobile | Mobile carrier | – |
| 603-496 | Bell Atlantic Mobile | Mobile carrier | – |
| 603-513 | Bell Atlantic Mobile | Mobile carrier | – |
| 603-545 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 603-568 | Bell Atlantic Mobile | Mobile carrier | 2002 |
| 603-573 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 603-584 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 603-688 | Peerless Network Of New Hampshire | Internet / business phone carrier | 2021 |
| 603-715 | Comcast | Internet / business phone carrier | – |
| 603-717 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 603-724 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 603-731 | Bell Atlantic Mobile | Mobile carrier | – |
| 603-738 | AT&T Mobility | Mobile carrier | – |
| 603-802 | Onvoy | Internet / business phone carrier | 2022 |
| 603-805 | MCImetro (Verizon Business) | Internet / business phone carrier | 2023 |
| 603-848 | UScellular | Mobile carrier | – |
| 603-856 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 603-892 | T-Mobile (including Sprint) | Mobile carrier | – |
| 603-931 | MCImetro (Verizon Business) | Internet / business phone carrier | 2015 |
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.