Phone numbers in Johnstown, New York
Johnstown has 14 phone prefixes in area codes 518, 838.
Biggest holders: AT&T Mobility, Frontier, MetroPCS (T-Mobile). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 79%
- Local phone company 14%
- Phone company 7%
Every prefix in Johnstown
Search the first six digits of a number in this list. If it's here, the number started in Johnstown with the carrier shown. If it isn't, check the New York page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 518-705 | AT&T Mobility | Mobile carrier | 2005 |
| 518-706 | AT&T Mobility | Mobile carrier | 2007 |
| 518-736 | Frontier | Local phone company | – |
| 518-762 | Frontier | Local phone company | – |
| 518-848 | MetroPCS (T-Mobile) | Mobile carrier | 2001 |
| 838-260 | AT&T Mobility | Mobile carrier | 2022 |
| 838-266 | AT&T Mobility | Mobile carrier | 2023 |
| 838-274 | AT&T Mobility | Mobile carrier | 2023 |
| 838-296 | AT&T Mobility | Mobile carrier | 2025 |
| 838-308 | AT&T Mobility | Mobile carrier | 2026 |
| 838-309 | AT&T Mobility | Mobile carrier | 2026 |
| 838-310 | AT&T Mobility | Mobile carrier | 2026 |
| 838-317 | AT&T Mobility | Mobile carrier | 2026 |
| 838-339 | Peering Hub | Phone company | – |
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.