Phone numbers in Summit, New York
Summit has 3 phone prefixes in area code 518.
Biggest holders: Middleburgh Tel, Charter / Spectrum, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 33%
- Internet / business phone carrier 33%
- Phone company 33%
Every prefix in Summit
Search the first six digits of a number in this list. If it's here, the number started in Summit with the carrier shown. If it isn't, check the New York page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 518-287 | Middleburgh Tel | Phone company | – |
| 518-544 | Charter / Spectrum | Internet / business phone carrier | 2011 |
| 518-973 | AT&T Mobility | Mobile carrier | 2024 |
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.