Area Code 564 Information
| Area Code: | 564 |
| State: | Washington |
| Cities: | Aberdeen, Bellingham, Bremerton, Lacey, Monroe, Mount Vernon, Port Angeles, Seattle, Vancouver |
Exchanges in Area Code 564
| Exchange | County | City | Carrier |
| 564-401-xxxx | Clallam | Port Angeles | Qwest Corporation - Wa |
| 564-301-xxxx | Clark | Vancouver | Qwest Corporation - Wa |
| 564-400-xxxx | Grays Harbor | Aberdeen | Qwest Corporation - Wa |
| 564-555-xxxx | King | Seattle | Qwest Corporation - Wa |
| 564-300-xxxx | Kitsap | Bremerton | Qwest Corporation - Wa |
| 564-501-xxxx | Skagit | Mount Vernon | Verizon Northwest Inc. - Wa |
| 564-500-xxxx | Snohomish | Monroe | Verizon Northwest Inc. - Wa |
| 564-201-xxxx | Thurston | Lacey | Qwest Corporation - Wa |
| 564-200-xxxx | Whatcom | Bellingham | Qwest Corporation - Wa |