| Date | IP Address |
| 2025-04-19 | 172.64.155.41 (ClassC) |
| 2025-05-01 | 104.18.32.215 (ClassC) |
| Date | Domain | IP |
| aleph01.gpo.gov | 2025-04-06 | 52.70.187.133 |
| hqsmtp01.gpo.gov | 2014-05-29 | 162.140.64.8 |
| metalib.gpo.gov | 2025-03-25 | 104.17.215.194 |
| bensguide.gpo.gov | 2025-04-19 | 104.17.146.10 |
| bookstore.gpo.gov | 2025-04-10 | 104.17.126.185 |
| catalog.gpo.gov | 2025-03-25 | 104.17.214.194 |
| m.gpo.gov | 2025-04-19 | 104.17.21.2 |
| contractorconnection.gpo.gov | 2019-11-04 | 104.17.186.8 |
| frwebgate.access.gpo.gov | 2025-04-25 | 104.18.32.215 |
| purl.access.gpo.gov | 2019-09-07 | 146.20.24.124 |
| winapps.access.gpo.gov | 2025-04-22 | 162.140.254.72 |
| edocket.access.gpo.gov | 2025-04-19 | 172.64.155.41 |
| permanent.access.gpo.gov | 2025-04-19 | 104.17.11.189 |
| wdet.gpo.gov | 2024-05-14 | 104.18.32.202 |
| api-wdet.gpo.gov | 2025-03-25 | 172.64.155.54 |
| aleph01-test.gpo.gov | 2025-04-25 | 52.22.159.147 |
| contractorconnection.test.gpo.gov | 2025-04-17 | 172.64.155.54 |
| fdmtest.gpo.gov | 2025-04-10 | 104.18.223.176 |
| www.gpo.gov | 2013-06-21 | 4.27.12.253 |