Phone numbers in Ellensburg, Washington
Ellensburg has 21 phone prefixes in area code 509.
Biggest holders: Consolidated Communications Of Washington, T-Mobile (including Sprint), AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 57%
- Local phone company 38%
- Internet / business phone carrier 5%
Every prefix in Ellensburg
Search the first six digits of a number in this list. If it's here, the number started in Ellensburg with the carrier shown. If it isn't, check the Washington page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 509-201 | Charter / Spectrum | Internet / business phone carrier | – |
| 509-273 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 509-306 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 509-312 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 509-607 | Verizon Wireless | Mobile carrier | – |
| 509-617 | T-Mobile (including Sprint) | Mobile carrier | 2024 |
| 509-705 | AT&T Mobility | Mobile carrier | 2024 |
| 509-708 | T-Mobile (including Sprint) | Mobile carrier | 2025 |
| 509-718 | T-Mobile (including Sprint) | Mobile carrier | 2026 |
| 509-856 | Consolidated Communications Of Washington | Local phone company | – |
| 509-857 | Consolidated Communications Of Washington | Local phone company | – |
| 509-859 | UScellular | Mobile carrier | – |
| 509-899 | AT&T Mobility | Mobile carrier | – |
| 509-925 | Consolidated Communications Of Washington | Local phone company | – |
| 509-929 | UScellular | Mobile carrier | – |
| 509-933 | Consolidated Communications Of Washington | Local phone company | – |
| 509-962 | Consolidated Communications Of Washington | Local phone company | – |
| 509-963 | Consolidated Communications Of Washington | Local phone company | – |
| 509-964 | Consolidated Communications Of Washington | Local phone company | – |
| 509-968 | Consolidated Communications Of Washington | Local phone company | – |
| 509-986 | T-Mobile (including Sprint) | Mobile 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.