| Date | IP Address |
| 2016-12-18 | 216.3.51.89 (ClassC) |
| 2017-01-04 | 204.93.46.20 (ClassC) |
| 2017-01-24 | 40.136.60.202 (ClassC) |
| 2017-02-10 | 40.136.60.147 (ClassC) |
| 2017-05-25 | 23.215.15.210 (ClassC) |
| 2017-11-03 | 23.14.94.23 (ClassC) |
| 2025-06-22 | 34.237.219.119 (ClassC) |
| 2025-08-01 | 52.54.96.194 (ClassC) |
| 2025-11-16 | 3.215.172.219 (ClassC) |
| Date | Domain | IP |
| workbench-staging.cisecurity.org | 2025-09-02 | 104.18.25.122 |
| learn.cisecurity.org | 2025-06-22 | 34.237.219.119 |
| surveys.cisecurity.org | 2025-11-13 | 23.41.4.86 |