Phone numbers in Ipswich, Massachusetts
Ipswich has 11 phone prefixes in area codes 351, 978.
Biggest holders: MetroPCS (T-Mobile), Verizon (local phone), Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 36%
- Local phone company 18%
- Internet / business phone carrier 36%
- Phone company 9%
Every prefix in Ipswich
Search the first six digits of a number in this list. If it's here, the number started in Ipswich with the carrier shown. If it isn't, check the Massachusetts page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 351-350 | MetroPCS (T-Mobile) | Mobile carrier | 2021 |
| 351-444 | Onvoy | Internet / business phone carrier | – |
| 351-900 | Fractel | Internet / business phone carrier | 2020 |
| 978-238 | T-Mobile (including Sprint) | Mobile carrier | – |
| 978-312 | Comcast | Internet / business phone carrier | – |
| 978-356 | Verizon (local phone) | Local phone company | – |
| 978-380 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 978-412 | Verizon (local phone) | Local phone company | – |
| 978-471 | MetroPCS (T-Mobile) | Mobile carrier | 2002 |
| 978-500 | Verizon Wireless | Mobile carrier | 2002 |
| 978-713 | Norfolk County Internet | 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.