Phone numbers in Fitchburg, Massachusetts
Fitchburg has 26 phone prefixes in area codes 351, 508, 978.
Biggest holders: Verizon (local phone), AT&T Mobility, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 31%
- Local phone company 27%
- Internet / business phone carrier 31%
- Phone company 12%
Every prefix in Fitchburg
Search the first six digits of a number in this list. If it's here, the number started in Fitchburg with the carrier shown. If it isn't, check the Massachusetts page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 351-242 | Onvoy | Internet / business phone carrier | 2023 |
| 508-331 | AT&T Mobility | Mobile carrier | – |
| 978-340 | Verizon (local phone) | Local phone company | – |
| 978-342 | Verizon (local phone) | Local phone company | – |
| 978-343 | Verizon (local phone) | Local phone company | – |
| 978-345 | Verizon (local phone) | Local phone company | – |
| 978-348 | Verizon (local phone) | Local phone company | – |
| 978-353 | Verizon (local phone) | Local phone company | – |
| 978-400 | Verizon Wireless | Mobile carrier | 2001 |
| 978-407 | AT&T Mobility | Mobile carrier | – |
| 978-424 | Tc Systems | Phone company | – |
| 978-502 | Verizon Wireless | Mobile carrier | – |
| 978-503 | Tc Systems | Phone company | – |
| 978-516 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 978-602 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 978-627 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 978-665 | Verizon (local phone) | Local phone company | – |
| 978-696 | Windstream (PAETEC) | Internet / business phone carrier | 2001 |
| 978-714 | Norfolk County Internet | Phone company | – |
| 978-790 | AT&T Mobility | Mobile carrier | 2001 |
| 978-829 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 978-855 | Verizon Wireless | Mobile carrier | 2002 |
| 978-868 | Verizon Wireless | Mobile carrier | 2001 |
| 978-878 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 978-906 | AT&T Mobility | Mobile carrier | 2002 |
| 978-956 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
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.