Phone numbers in Stamford, New York
Stamford has 3 phone prefixes in area code 607.
Biggest holders: Tc Systems, Verizon (local phone), Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 33%
- Internet / business phone carrier 33%
- Phone company 33%
Every prefix in Stamford
Search the first six digits of a number in this list. If it's here, the number started in Stamford with the carrier shown. If it isn't, check the New York page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 607-214 | Tc Systems | Phone company | – |
| 607-652 | Verizon (local phone) | Local phone company | – |
| 607-670 | Onvoy | Internet / business phone carrier | 2021 |
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.