| Date | IP Address |
| 2013-10-24 | 63.140.35.160 (ClassC) |
| 2013-11-17 | 66.235.141.17 (ClassC) |
| 2014-01-22 | 66.235.141.146 (ClassC) |
| 2014-11-29 | 66.235.153.36 (ClassC) |
| 2017-04-06 | 34.199.102.192 (ClassC) |
| 2017-12-13 | 66.235.148.73 (ClassC) |
| 2019-11-03 | 54.187.216.46 (ClassC) |
| 2023-07-23 | 104.16.55.16 (ClassC) |
| 2024-05-27 | 104.16.54.16 (ClassC) |
| 2025-07-20 | 104.18.64.82 (ClassC) |
| 2025-08-08 | 104.17.6.58 (ClassC) |
| Date | Domain | IP |
| pics2.loc.gov | 2025-01-22 | 104.18.64.82 |
| pps2.loc.gov | 2014-07-05 | 140.147.249.134 |
| stage.aaa.loc.gov | 2025-03-16 | 104.18.64.82 |
| pps2b.loc.gov | 2014-05-29 | 140.147.239.134 |
| id.loc.gov | 2024-06-25 | 172.64.148.26 |
| nlsbard.loc.gov | 2025-06-29 | 104.17.6.58 |
| tile.loc.gov | 2024-03-20 | 104.16.54.16 |
| time.loc.gov | 2025-04-24 | 104.18.64.82 |
| stage.time.loc.gov | 2025-06-25 | 104.18.64.82 |
| webarchive.loc.gov | 2024-09-15 | 104.17.6.58 |
| bard-staging.loc.gov | 2025-07-05 | 104.17.6.58 |
| priv.gis-staging.loc.gov | 2025-01-11 | 104.18.64.82 |
| catalog.loc.gov | 2024-05-23 | 104.16.54.16 |
| newsroom.loc.gov | 2024-12-29 | 3.163.189.82 |
| cdn.loc.gov | 2024-05-24 | 104.16.55.16 |
| cmon.loc.gov | 2023-07-23 | 104.16.55.16 |
| smon.loc.gov | 2023-08-04 | 63.140.36.112 |
| desktop.loc.gov | 2024-05-21 | 104.16.54.16 |
| catdir.loc.gov | 2025-01-11 | 104.18.64.82 |
| thomas.loc.gov | 2025-04-18 | 104.17.6.58 |
| labs.loc.gov | 2025-03-13 | 104.18.34.205 |
| annotation.labs.loc.gov | 2024-07-19 | 104.18.43.163 |
| beyondwords.labs.loc.gov | 2025-03-17 | 104.18.34.205 |
| metrics.loc.gov | 2025-04-05 | 104.18.64.82 |
| staging-ml04-8001.lds.loc.gov | 2024-12-22 | 172.64.148.30 |
| guides.loc.gov | 2024-05-25 | 104.16.55.16 |
| authorities.loc.gov | 2025-07-31 | 140.147.239.100 |
| blogs.loc.gov | 2024-04-15 | 104.16.55.16 |
| gis.loc.gov | 2025-06-30 | 104.18.36.14 |
| enroll.nls.loc.gov | 2025-07-12 | 104.17.6.58 |
| mplusacf.crs.loc.gov | 2025-06-28 | 104.18.64.82 |
| stage.submit.loc.gov | 2025-06-25 | 104.18.64.82 |
| crowd-test.loc.gov | 2025-07-21 | 104.18.64.82 |
| www.loc.gov | 2024-04-19 | 104.16.54.16 |
| memory.loc.gov | 2025-01-11 | 104.17.6.58 |