Phone numbers in Southwick, Massachusetts
Southwick has 6 phone prefixes in area code 413.
Biggest holders: Windstream (PAETEC), Tc Systems, Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 17%
- Internet / business phone carrier 67%
- Phone company 17%
Every prefix in Southwick
Search the first six digits of a number in this list. If it's here, the number started in Southwick with the carrier shown. If it isn't, check the Massachusetts page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 413-305 | Tc Systems | Phone company | 2019 |
| 413-456 | Onvoy | Internet / business phone carrier | 2021 |
| 413-569 | Verizon (local phone) | Local phone company | – |
| 413-831 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 413-832 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 413-998 | 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.