Phone numbers in Hamilton, Massachusetts
Hamilton has 8 phone prefixes in area codes 351, 978.
Biggest holders: Onvoy, Level 3 (Lumen), AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 12%
- Local phone company 12%
- Internet / business phone carrier 75%
Every prefix in Hamilton
Search the first six digits of a number in this list. If it's here, the number started in Hamilton with the carrier shown. If it isn't, check the Massachusetts page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 351-216 | AT&T Mobility | Mobile carrier | 2020 |
| 351-241 | Onvoy | Internet / business phone carrier | 2023 |
| 978-233 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 978-307 | Onvoy | Internet / business phone carrier | 2018 |
| 978-347 | MCImetro (Verizon Business) | Internet / business phone carrier | 2001 |
| 978-468 | Verizon (local phone) | Local phone company | – |
| 978-626 | Comcast | Internet / business phone carrier | – |
| 978-653 | Level 3 (Lumen) | 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.