| Tiền tố được công bố | Description | Quốc gia | Tiền tố Cha | RIR |
|---|
| 143.55.96.0/19 | Washington State Department of Children, Youth, and Families | United States | | ARIN |
| 146.76.0.0/16 | Washington State Department of Natural Resources | United States | | ARIN |
| 147.55.0.0/16 | State of Washington | United States | | ARIN |
| 147.56.0.0/16 | Department of Social and Health Services | United States | | ARIN |
| 149.20.128.0/19 | Washington State Department of Children, Youth, and Families | United States | | ARIN |
| 152.113.0.0/16 | Washington State Attorney General | United States | | ARIN |
| 159.1.0.0/16 | Washington Department of Labor and Industries | United States | | ARIN |
| 165.151.0.0/16 | State of Washington/Department of Ecology | United States | | ARIN |
| 167.72.0.0/16 | Washington State Patrol | United States | | ARIN |
| 192.149.56.0/24 | Washington State Department of Health | United States | | ARIN |
| 192.150.143.0/24 | Washington State Department of Health | United States | | ARIN |
| 192.209.32.0/20 | State of Washington Department of Revenue | United States | | ARIN |
| 192.209.48.0/21 | State of Washington Department of Revenue | United States | | ARIN |
| 192.209.56.0/22 | State of Washington Department of Revenue | United States | | ARIN |
| 192.209.60.0/23 | State of Washington Department of Revenue | United States | | ARIN |
| 192.230.0.0/20 | Washington State Department of Health | United States | | ARIN |
| 192.94.25.0/24 | Washington State Department of Fish and Wildlife | United States | | ARIN |
| 198.105.128.0/20 | State of Washington | United States | | ARIN |
| 198.135.121.0/24 | Washington State | United States | | ARIN |
| 198.180.4.0/22 | Washington State Dept. of Trade and Economic Development | United States | | ARIN |
| 2600:9800::/24 | State of Washington | United States | | ARIN |
