| A.B. Cellular Holding, LLC | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| ALIA NETWORK CORPORATION | TalkTT Services | Interconnected VoIP | Renton | Active |
| AMCS LLC | - | Toll Reseller | Seattle | Active |
| AN Subsidiary, L.L.C. | - | Cellular/PCS/SMR | Belevue | Inactive |
| AP&T Long Distance | - | Toll Reseller | Port Townsend | Active |
| AP&T Wireless | - | Private Service Provider | Port Townsend | Active |
| AT&T Wireless PCS of Cleveland, LLC | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| AT&T Wireless PCS of Philadelphia, LLC | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| AT&T Wireless PCS, LLC | - | Cellular/PCS/SMR | Redmond | Inactive |
| AT&T Wireless Services of Alaska, Inc. | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| AT&T Wireless Services of California, Inc. | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| AT&T Wireless Services of Colorado, Inc. | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| AT&T Wireless Services of Connecticut, Inc. | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| AT&T Wireless Services of Florida, Inc. | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| AT&T Wireless Services of Hawaii, Inc. | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| AT&T Wireless Services of Idaho, Inc. | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| AT&T Wireless Services of Minnesota | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| AT&T Wireless Services of Nevada, Inc. | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| AT&T Wireless Services of Oregon, Inc. | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| AT&T Wireless Services of San Antonio | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| AT&T Wireless Services of Tulsa, Inc. | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| AT&T Wireless Services of Utah, Inc. | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| AT&T Wireless Services of Washington, Inc. | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| Advanced Business Network Services, Inc. | ABNS, Inc. | Interexchange Carrier | Fall City | Active |
| Advanced Stream Broadband Incorporated | Advanced Stream Broadband | Interconnected VoIP | Tacoma | Active |
| Advanced TelCom Group, Inc. | - | CAP/CLEC | Vancouver | Inactive |
| Alaska Telephone Company | - | Incumbent LEC | Port Townsend | Active |
| Alphatel Payphone Service | - | Payphone Service Provider | Renton | Active |
| America West Communications | - | Payphone Service Provider | Spokane | Active |
| Andrew David Balholm | Norcell | Cellular/PCS/SMR | Clayton | Active |
| Angeles Communications, Inc. | - | Interconnected VoIP | Port Angeles | Active |
| Audian, Inc. | Audian | Audio Bridge Service | Kirkland | Active |
| Avista Communications of California, Inc. | - | CAP/CLEC | Spokane | Inactive |
| Avista Communications of Idaho | Avista Communications of Idaho, Inc. | CAP/CLEC | Spokane | Inactive |
| Avista Communications of Montana, Inc. | - | CAP/CLEC | Spokane | Inactive |
| Avista Communications of Washington, Inc. | - | CAP/CLEC | Spokane | Inactive |
| Avista Communications of Wyoming, Inc. | - | CAP/CLEC | Spokane | Inactive |
| Avista Fiber, Inc. | Avista Fiber | CAP/CLEC | Spokane | Inactive |
| Bakersfield Cellular, LLC | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| Bay Area Cellular Telephone Company | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| Bellingham Cellular Partnership | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| Benton Rural Electric Association | Benton REA | Other Local | Prosser | Inactive |
| Bettles Tel. Co. | Bettles Telephone Inc | Incumbent LEC | Port Townsend | Active |
| Binghamton CelTelCo | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| Boise City Cellular Partnership | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| Bradenton Cellular Partnership | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| Bremerton Cellular Telephone Company | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| Cable Plus Company, LP | - | CAP/CLEC | Bellevue | Active |
| Cagel Cellular Communications Company | AT&T Wireless Services, Inc. | Cellular/PCS/SMR | Redmond | Inactive |
| California Phones LP-00 | Digital Access Communications (agent) | Payphone Service Provider | Seattle | Inactive |