Phone numbers in Rochester, New Hampshire
Rochester has 16 phone prefixes in area code 603.
Biggest holders: Consolidated Comm Of No. New England-nh, Comcast, Windstream (PAETEC). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 25%
- Local phone company 25%
- Internet / business phone carrier 44%
- Phone company 6%
Every prefix in Rochester
Search the first six digits of a number in this list. If it's here, the number started in Rochester with the carrier shown. If it isn't, check the New Hampshire page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 603-330 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-332 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-335 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-337 | Consolidated Comm Of No. New England-nh | Local phone company | – |
| 603-403 | Comcast | Internet / business phone carrier | 2018 |
| 603-441 | Comcast | Internet / business phone carrier | 2021 |
| 603-507 | AT&T Mobility | Mobile carrier | 2015 |
| 603-509 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 603-602 | Teleport Communications America | Internet / business phone carrier | 2020 |
| 603-822 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 603-833 | Bell Atlantic Mobile | Mobile carrier | 2004 |
| 603-919 | Bell Atlantic Mobile | Mobile carrier | 2023 |
| 603-923 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 603-948 | Idt America | Internet / business phone carrier | 2008 |
| 603-973 | MetroPCS (T-Mobile) | Mobile carrier | 2002 |
| 603-994 | Freedom Ring Communications | 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.