| Date | IP Address |
| 2020-06-19 | 52.8.246.59 (ClassC) |
| 2021-02-02 | 52.8.71.76 (ClassC) |
| 2022-07-19 | 52.8.246.192 (ClassC) |
| 2024-03-01 | 13.56.10.172 (ClassC) |
| 2024-12-26 | 18.144.119.190 (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 | 2024-12-17 | 13.111.218.82 |