| Date | IP Address |
| 2013-08-08 | 173.213.225.251 (ClassC) |
| 2014-10-30 | 173.213.226.52 (ClassC) |
| 2015-02-23 | 93.184.215.223 (ClassC) |
| 2015-03-18 | 68.232.34.125 (ClassC) |
| 2024-10-12 | 104.18.29.89 (ClassC) |
| 2025-05-13 | 104.18.28.89 (ClassC) |
| Date | Domain | IP |
| learn.cisecurity.org | 2024-07-17 | 34.237.219.119 |