| Date | IP Address |
| 2024-11-07 | 104.21.77.228 (ClassC) |
| 2025-01-09 | 104.21.64.1 (ClassC) |
| 2025-03-23 | 104.21.80.1 (ClassC) |
| 2025-06-25 | 104.21.16.1 (ClassC) |
| 2026-02-07 | 172.67.212.37 (ClassC) |
| Date | Domain | IP |
| image.email.houndapp.com | 2024-11-25 | 23.44.175.181 |
| click.email.houndapp.com | 2024-03-01 | 13.56.10.172 |
| view.email.houndapp.com | 2026-01-21 | 13.111.218.82 |