Phone numbers in Catskill, New York
Catskill has 11 phone prefixes in area codes 518, 838.
Biggest holders: AT&T Mobility, Level 3 (Lumen), Tc Systems. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 18%
- Local phone company 9%
- Internet / business phone carrier 55%
- Phone company 18%
Every prefix in Catskill
Search the first six digits of a number in this list. If it's here, the number started in Catskill with the carrier shown. If it isn't, check the New York page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 518-291 | AT&T Mobility | Mobile carrier | 2004 |
| 518-303 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 518-625 | Tc Systems | Phone company | – |
| 518-719 | Firstlight Fiber | Internet / business phone carrier | – |
| 518-819 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 518-943 | Verizon (local phone) | Local phone company | – |
| 518-947 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 838-215 | Right Call | Phone company | 2019 |
| 838-279 | AT&T Mobility | Mobile carrier | 2024 |
| 838-836 | Onvoy | Internet / business phone carrier | 2021 |
| 838-944 | Fractel | 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.