| Date | IP Address |
| 2024-06-02 | 3.224.61.231 (ClassC) |
| 2025-11-04 | 44.214.110.138 (ClassC) |
| 2026-02-28 | 54.204.105.132 (ClassC) |
| Date | Domain | IP |
| router10.mail.cornell.edu | 2013-11-11 | 128.253.83.181 |
| router1.mail.cornell.edu | 2014-05-29 | 128.253.83.161 |
| router2.mail.cornell.edu | 2013-05-16 | 128.253.83.162 |
| router4.mail.cornell.edu | 2014-06-03 | 128.253.83.139 |
| router9.mail.cornell.edu | 2014-05-29 | 128.253.83.180 |
| www.bulk.mail.cornell.edu | 2025-11-04 | 44.214.110.138 |