Phone numbers in Portsmouth, Rhode Island
Portsmouth has 13 phone prefixes in area code 401.
Biggest holders: AT&T Mobility, Windstream (PAETEC), Verizon (local phone). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 31%
- Local phone company 15%
- Internet / business phone carrier 46%
- Phone company 8%
Every prefix in Portsmouth
Search the first six digits of a number in this list. If it's here, the number started in Portsmouth with the carrier shown. If it isn't, check the Rhode Island page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 401-251 | The Voice Application Network | Phone company | 2016 |
| 401-264 | Teleport Communications America | Internet / business phone carrier | – |
| 401-266 | AT&T Mobility | Mobile carrier | 2002 |
| 401-293 | Comcast | Internet / business phone carrier | – |
| 401-366 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 401-418 | MetroPCS (T-Mobile) | Mobile carrier | 2002 |
| 401-472 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 401-496 | Onvoy | Internet / business phone carrier | – |
| 401-643 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 401-682 | Verizon (local phone) | Local phone company | – |
| 401-683 | Verizon (local phone) | Local phone company | – |
| 401-835 | AT&T Mobility | Mobile carrier | – |
| 401-924 | AT&T Mobility | Mobile 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.