Area code 509: where it is and who calls from it
Area code 509 is in Washington.
Washington (all of eastern Washington, including Spokane, Ellensburg, Pullman, the Tri-Cities area, Walla Walla, Wenatchee, and Yakima)
| Where | Washington |
|---|---|
| Time zone | Pacific Time ยท local time |
| In service since | 1957 |
| Overlay | No |
| Prefixes assigned | 763 of 792 possible (96%) |
Where 509 numbers started
Every prefix is assigned to a rate center, the local calling area it was set up in. These are the biggest in 509, with how many prefixes each has.
Plus 58 smaller rate centers.
Who holds 509 numbers
- Mobile carrier 32%
- Local phone company 39%
- Internet / business phone carrier 25%
- Phone company 4%
| Carrier | Type | Prefixes | Share |
|---|---|---|---|
| CenturyLink / Lumen | Local phone company | 205 | 27% |
| AT&T Mobility | Mobile carrier | 77 | 10% |
| Ziply Fiber | Local phone company | 73 | 10% |
| Onvoy | Internet / business phone carrier | 69 | 9% |
| T-Mobile (including Sprint) | Mobile carrier | 63 | 8% |
| Verizon Wireless | Mobile carrier | 60 | 8% |
| Level 3 (Lumen) | Internet / business phone carrier | 38 | 5% |
| MCImetro (Verizon Business) | Internet / business phone carrier | 26 | 3% |
| UScellular | Mobile carrier | 19 | 2% |
| MetroPCS (T-Mobile) | Mobile carrier | 11 | 1% |
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.
States served: Washington.
Other area codes in Washington
Got a call from 509?
An area code tells you where a number was first assigned, not where the caller is. People keep their numbers when they move, and scammers can fake any number. If you weren't expecting the call, let it go to voicemail.
If the call shows a 509 number that matches the first six digits of your own, that's often neighbor spoofing. Use the box above to check the full number.
Area code facts from the NANPA area code database (updated 10/06/2026); prefixes and carriers from NANPA's central office code records (updated 2026-10-10). Place description adapted from Wikipedia, CC BY-SA 4.0.