| Date | IP Address |
| 2024-09-21 | 23.196.202.214 (ClassC) |
| 2024-11-02 | 92.123.203.141 (ClassC) |
| 2025-04-23 | 104.90.249.158 (ClassC) |
| 2025-06-26 | 23.222.144.166 (ClassC) |
| Date | Domain | IP |
| cloud.email.a1.bg | 2025-06-01 | 161.71.49.42 |
| image.email.a1.bg | 2024-09-21 | 23.196.202.214 |
| click.email.a1.bg | 2025-05-25 | 161.71.50.255 |
| view.email.a1.bg | 2025-06-18 | 161.71.52.255 |