| Date | IP Address |
| 2020-05-28 | 172.64.106.24 (ClassC) |
| 2020-05-28 | 172.64.107.24 (ClassC) |
| 2020-07-08 | 172.67.216.244 (ClassC) |
| 2020-12-17 | 172.67.154.192 (ClassC) |
| 2021-01-18 | 172.67.130.157 (ClassC) |
| 2021-02-02 | 104.21.85.129 (ClassC) |
| 2021-02-16 | 172.64.108.15 (ClassC) |
| 2021-02-23 | 104.21.69.61 (ClassC) |
| 2021-04-16 | 172.64.105.15 (ClassC) |
| 2021-04-23 | 104.21.92.26 (ClassC) |
| 2024-12-26 | 172.67.145.112 (ClassC) |
| 2026-02-15 | 104.21.63.113 (ClassC) |
| Date | Domain | IP |
| blog.mailbluster.com | 2025-05-24 | 172.67.145.112 |
| api.mailbluster.com | 2025-04-10 | 104.21.63.113 |
| track.mailbluster.com | 2025-07-22 | 54.76.111.219 |
| echo.mailbluster.com | 2024-11-21 | 3.248.151.7 |
| app.mailbluster.com | 2024-12-26 | 172.67.145.112 |
| email-resources.mailbluster.com | 2024-12-27 | 104.21.63.113 |
| www.mailbluster.com | 2025-05-15 | 172.67.145.112 |