Phone numbers in Westford, Massachusetts
Westford has 19 phone prefixes in area codes 351, 508, 978.
Biggest holders: Verizon (local phone), MetroPCS (T-Mobile), Windstream (PAETEC). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 32%
- Local phone company 26%
- Internet / business phone carrier 26%
- Phone company 16%
Every prefix in Westford
Search the first six digits of a number in this list. If it's here, the number started in Westford with the carrier shown. If it isn't, check the Massachusetts page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 351-226 | FIVE9 | Phone company | – |
| 351-243 | AT&T (local phone) | Local phone company | 2023 |
| 508-517 | AT&T Mobility | Mobile carrier | – |
| 978-303 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 978-320 | MetroPCS (T-Mobile) | Mobile carrier | 2011 |
| 978-392 | Verizon (local phone) | Local phone company | – |
| 978-399 | Verizon (local phone) | Local phone company | 2001 |
| 978-413 | MetroPCS (T-Mobile) | Mobile carrier | 2002 |
| 978-467 | Rcn Telecom Services | Phone company | – |
| 978-490 | MetroPCS (T-Mobile) | Mobile carrier | 2001 |
| 978-496 | Comcast | Internet / business phone carrier | 2004 |
| 978-577 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 978-589 | Verizon (local phone) | Local phone company | – |
| 978-692 | Verizon (local phone) | Local phone company | – |
| 978-727 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 978-799 | Verizon Wireless | Mobile carrier | – |
| 978-846 | Verizon Wireless | Mobile carrier | 2002 |
| 978-850 | Leap Telecom | Phone company | – |
| 978-923 | Onvoy | Internet / business phone 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.