Phone numbers in Williamstown, Massachusetts
Williamstown has 7 phone prefixes in area code 413.
Biggest holders: Windstream (PAETEC), Verizon (local phone), Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 14%
- Local phone company 29%
- Internet / business phone carrier 57%
Every prefix in Williamstown
Search the first six digits of a number in this list. If it's here, the number started in Williamstown with the carrier shown. If it isn't, check the Massachusetts page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 413-217 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 413-458 | Verizon (local phone) | Local phone company | – |
| 413-597 | Verizon (local phone) | Local phone company | – |
| 413-607 | Verizon Wireless | Mobile carrier | 2026 |
| 413-741 | Onvoy | Internet / business phone carrier | 2021 |
| 413-803 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 413-884 | Windstream (PAETEC) | 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.