| Date | IP Address |
| 2020-10-14 | 151.101.130.228 (ClassC) |
| 2024-12-22 | 146.75.42.228 (ClassC) |
| 2024-12-25 | 151.101.22.228 (ClassC) |
| Date | Domain | IP |
| www.microsurg.hs.columbia.edu | 2024-12-22 | 146.75.42.228 |
| mailman.hs.columbia.edu | 2024-09-01 | 151.101.194.228 |
| www.congenitalheart.hs.columbia.edu | 2024-12-19 | 151.101.22.228 |