Phone numbers in Southampton, New York
Southampton has 15 phone prefixes in area codes 631, 934.
Biggest holders: Verizon (local phone), AT&T Mobility, Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 20%
- Local phone company 27%
- Internet / business phone carrier 53%
Every prefix in Southampton
Search the first six digits of a number in this list. If it's here, the number started in Southampton with the carrier shown. If it isn't, check the New York page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 631-204 | Verizon (local phone) | Local phone company | – |
| 631-259 | Verizon (local phone) | Local phone company | – |
| 631-268 | Peerless Network Of New York | Internet / business phone carrier | 2013 |
| 631-283 | Verizon (local phone) | Local phone company | – |
| 631-287 | Verizon (local phone) | Local phone company | – |
| 631-353 | Bandwidth | Internet / business phone carrier | 2010 |
| 631-377 | AT&T Mobility | Mobile carrier | 2006 |
| 631-488 | Csc Voice | Internet / business phone carrier | 2007 |
| 631-614 | Onvoy | Internet / business phone carrier | – |
| 631-702 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 631-800 | Onvoy | Internet / business phone carrier | – |
| 631-903 | AT&T Mobility | Mobile carrier | 2002 |
| 934-222 | Evolve Cellular | Mobile carrier | 2016 |
| 934-699 | Fractel | Internet / business phone carrier | 2021 |
| 934-732 | Fractel | Internet / business phone carrier | 2020 |
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.