--- title: "Area code 564: Washington, United States" url: "https://lookvalid.com/area-code/564.md" canonical_url: "https://lookvalid.com/area-code/564" last_updated: "2026-10-23" type: "reference" summary: "Area code 564 serves Washington, United States. Number formats, numbering rules, a live phone validator and the other codes in Washington." --- # Area code 564: Washington, United States Area code 564 serves Washington, United States. Number formats, numbering rules, a live phone validator and the other codes in Washington. NANPA lists 92 central office codes (prefixes) in use in area code 564, held by 19 holders across 32 rate centers. T-Mobile USA holds the most prefixes, 21 (23%). 100% of the prefixes are pooled, which means their thousands-blocks can belong to different companies. The FCC unwanted-call data has 232 complaints on file for 223 numbers in 564, most often filed as "Unwanted Calls". These are consumer reports, not findings. ## Facts - In service since: 2017-08-28 - Time zone: Pacific (P) - Assigned overlays: 206 (1947-01-01), 564, 360 - Prefixes in use: 92 - Pooled prefixes: 92 (100%) - Rate centers: 32 - Companies holding prefixes: 19 - Assignment dates on file: 2017-06-30 to 2025-12-05 (91 prefixes) - ZIP codes in its places: 55 ## Rate centers | Rate center | Prefixes | Share | | --- | --- | --- | | BREMERTON | 17 | 18% | | VANCOUVER | 13 | 14% | | OLYMPIA | 9 | 10% | | LONGVIEW | 6 | 7% | | ABERDEEN | 5 | 5% | | CENTRALIA | 4 | 4% | | WHATCOMCTY | 4 | 4% | | MARYSVILLE | 3 | 3% | | 24 other rate centers | 31 | 34% | ## Carriers | Holder | Prefixes | Share | | --- | --- | --- | | T-Mobile USA | 21 | 23% | | Verizon Wireless | 13 | 14% | | Onvoy | 12 | 13% | | Teleport Communications America | 8 | 9% | | Fractel | 7 | 8% | | Ton80 Communications | 6 | 7% | | 13 other carriers | 25 | 27% | A prefix holder is the company a code was assigned to, not necessarily a number's current carrier, because numbers can be ported to another company. ## History - 1995-01-15: Area code 360, named as the parent of 564 in the NANPA report, was in service. - 2017-08-28: Area code 564 went into service. ## Nearest area codes The area codes closest to 564, measured between the centers of the ZIP code places they serve, are 360 (about 1 mile), 253 (about 33 miles), 425 (about 62 miles), 971 (about 98 miles) and 503 (about 99 miles). ## ZIP codes 55 ZIP codes fall in places that have a rate center in this area code. The places with the most are Vancouver, WA (14 ZIP codes), Olympia, WA (11 ZIP codes) and Bremerton, WA (5 ZIP codes). A ZIP code and an area code are unrelated systems, so a ZIP code can sit in more than one area code and an area code spans many ZIP codes. ## Complaints on file 232 complaints for 223 numbers. Numbers whose latest complaint falls in each year: - 2023: 40 - 2024: 37 - 2025: 39 ## Questions ### Where is area code 564? NANPA assigns area code 564 to Washington, United States. ### In which state does area code 564 sit? Washington. 564 is one of 6 area codes the NANPA table assigns to the state. ### Which places does area code 564 cover? The places with the most ZIP codes among the rate centers in 564 are Vancouver, WA, Olympia, WA and Bremerton, WA. The rate center list on this page shows all of them. ### Who owns area code 564? NANPA assigns area codes. Within 564, T-Mobile USA holds the most prefixes, 21 prefixes or 23%. ### Which time zone does 564 use? The NANPA NPA report lists the time zone for 564 as Pacific (P). ### What year did 564 enter service? The NANPA NPA report gives an in-service date of 2017-08-28, so 564 has been in use since 2017. ### Does area code 564 have an overlay? Yes. 206 (in service 1947-01-01) and 564, 360 share the same area with 564, so numbers from all of them are local to each other. ### Which area codes are nearest to 564? The area codes closest to 564, measured between the centers of the ZIP code places they serve, are 360 (about 1 mile), 253 (about 33 miles), 425 (about 62 miles), 971 (about 98 miles) and 503 (about 99 miles). ### How many prefixes does area code 564 have? NANPA's report dated 2026-10-17 lists 92 prefixes in service in 564, spread over 32 rate centers and 19 holders. ### Are there complaints about 564 numbers? The FCC data on file has 232 complaints for 223 numbers in 564. They are unverified consumer reports. A number with no complaints on file is not proven safe. Sources: NANPA central office code report dated 2026-10-17; NANPA NPA report dated 2026-10-18; FCC unwanted-call complaints, data fetched 2026-10-17; ZIP code places from GeoNames (CC BY 4.0).