| Date | IP Address |
| 2013-04-01 | 8.27.243.253 (ClassC) |
| 2013-04-01 | 205.128.94.253 (ClassC) |
| 2013-04-01 | 8.27.254.249 (ClassC) |
| 2013-11-27 | 8.26.221.126 (ClassC) |
| 2013-11-27 | 8.26.218.126 (ClassC) |
| 2014-05-29 | 8.254.72.126 (ClassC) |
| 2014-07-04 | 4.27.19.126 (ClassC) |
| 2014-07-17 | 206.33.41.253 (ClassC) |
| 2014-11-14 | 8.254.64.126 (ClassC) |
| 2015-04-23 | 204.160.126.253 (ClassC) |
| 2016-01-27 | 206.33.35.125 (ClassC) |
| 2024-12-21 | 99.83.174.136 (ClassC) |
| 2024-12-25 | 75.2.36.59 (ClassC) |
| Date | Domain | IP |
| ns1.ecfr.gov | 2024-12-21 | 162.159.4.127 |
| ns2.ecfr.gov | 2024-12-21 | 162.159.5.58 |
| www.ecfr.gov | 2014-11-14 | 8.254.64.126 |