Washington area codes
Washington uses 6 area codes. The oldest is 206, in service since 1947; the newest is 564, from 2017. Across them 3,534 of 4,716 possible number blocks are allocated, 74.9% of capacity. 360, 509 and 206 are at or past 95%, which is why new numbers there come from overlays rather than the original code. Lumen holds 32.4% of the 3,534 assigned blocks across the state, ahead of T-Mobile at 12.7%; a further 6.4% sits with CLEC and VoIP holders outside the national carriers. In the 33 days to 30 October 2026, FTC complaints named a Washington caller ID 3,692 times – 1.6% of all complaints in the window, most often 360 with 970 (44th of 422 nationally). NANPA has relief planning under way for 509, so another code is coming. NANPA records 256 rate centers across the state's codes, and local calls take all ten digits.
All 6 codes
| Code | In service | Blocks used | Largest holder | Complaints | Shares area with |
|---|---|---|---|---|---|
| 206 | 1947 | 752/786 | Lumen 37.9% | 812 | 564 |
| 253 | 1997 | 508/786 | Lumen 35.8% | 489 | no overlay |
| 360 | 1995 | 786/786 | Lumen 37.3% | 970 | 564 |
| 425 | 1997 | 628/786 | Lumen 22% | 862 | no overlay |
| 509 overlay coming | 1957 | 763/786 | Lumen 31.8% | 371 | no overlay |
| 564 | 2017 | 97/786 | T-Mobile 23.7% | 188 | 206, 360 |
Block share is share of allocated number blocks, not of subscribers. Complaint counts cover 28 Sep – 30 Oct 2026 and reflect spoofed caller IDs as much as real calls.
How full Washington’s codes are
A code holds at most 786 blocks of 10,000 numbers each. When a code fills up, the administrator does not reclaim numbers – it adds an overlay, and from then on new numbers in the same area come from the new code.
Full or nearly full
Who holds the number blocks
Counted from every assigned block in the state: 3,534 blocks, each with the holder NANPA recorded for it. Percentages are measured, not estimated.
| Holder | Blocks | Share of Washington | Largest in |
|---|---|---|---|
| Lumen | 1,146 | 32.4% | 5 codes |
| T-Mobile | 450 | 12.7% | 1 code |
| Verizon | 425 | 12% | – |
| AT&T | 405 | 11.5% | – |
| Ziply Fiber | 282 | 8% | – |
| Onvoy | 268 | 7.6% | – |
| Other CLEC / VoIP | 227 | 6.4% | – |
| Allstream | 130 | 3.7% | – |
| Comcast | 47 | 1.3% | – |
| Spok | 36 | 1% | – |
| Bandwidth | 24 | 0.7% | – |
| Charter | 20 | 0.6% | – |
“Other CLEC / VoIP” is not one company: it is every holder outside the national carriers counted together, which is what resellers and app-based numbers look like in the records. This is allocation, not subscribers.
Spam complaints naming Washington codes
FTC Do Not Call complaints where the caller ID shown was a Washington number, 28 Sep – 30 Oct 2026 (33 days). Caller IDs on spam calls are routinely faked, so these are complaints about the code, not calls proven to come from it.
| Code | Complaints | National rank |
|---|---|---|
| 360 | 970 | #44 of 422 |
| 425 | 862 | #74 of 422 |
| 206 | 812 | #95 of 422 |
| 253 | 489 | #215 of 422 |
| 509 | 371 | #263 of 422 |
What people said the calls were about
- Other – 344
- Dropped call or no message – 115
- Reducing your debt (credit cards, mortgage, student loans) – 99
- Calls pretending to be government, businesses, or family and friends – 86
Topics as the complainant chose them, for the codes where the FTC published a topic.
What is coming next
NANPA has relief planning open for 509 – the step that comes before a new overlay is announced. Watch this code if you need to know whether dialing or new-number availability is about to change.
How Washington got its codes
1 in the 1940s, 1 in the 1950s, 3 in the 1990s, 1 in the 2010s. Each code after the first was split off from or overlaid on one already in service.
- 1947 206 goes into service.
- 1957 509 goes into service.
- 1995 360 goes into service, split from or overlaid on 206.
- 1997 253 goes into service, split from or overlaid on 206.
- 1997 425 goes into service, split from or overlaid on 206.
- 2017 564 goes into service, split from or overlaid on 360.
Time zones
Washington is in Pacific time.
Frequently asked about Washington area codes
How many area codes does Washington have?
6 in service. They are 206, 253, 360, 425, 509 and 564.
What is the oldest area code in Washington?
206, in service since 1947. Every later code in the state was split off from or overlaid on an existing one.
What is the newest area code in Washington?
564, from 2017, overlaying 360.
Is Washington getting a new area code?
Probably. No new code is assigned yet, but NANPA lists relief planning under way for 509, which is the step before a new overlay is announced.
What time zone is Washington in?
Pacific time.
Which Washington area code gets the most spam complaints?
360 – 970 FTC complaints in the 33 days to 30 October 2026, 44th of 422 codes nationally. Those are complaints about the caller ID shown, and spam callers routinely fake a local-looking number, so this says the code is imitated often, not that the calls come from there.
Which carrier holds the most Washington numbers?
Lumen, with 32.4% of the 3,534 blocks assigned across Washington, ahead of T-Mobile at 12.7%. This is allocation of blocks by the numbering administrator, not a count of subscribers – people keep their numbers when they switch carriers.
Do you have to dial 10 digits in Washington?
Yes. Every code in the state is in an overlay or ten-digit dialing area, so a local call needs the area code too. Dialing seven digits reaches a recording, not a wrong number.
Sources and verification
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- NANPA – CO Code Assignment Records, All States (utilized), file updated 11/01/2026, retrieved Nov 1, 2026
- FTC – Do Not Call Reported Calls Data, 28 Sep – 30 Oct 2026, retrieved Nov 1, 2026
Figures on this page are counted from those files, not copied from other sites. Spotted an error? Request a correction. How we collect and check: methodology.