| Date | IP Address |
| 2019-01-06 | 193.19.179.78 (ClassC) |
| 2025-01-01 | 31.15.14.3 (ClassC) |
| Date | Domain | IP |
| mail6.a1-computers.cz | 2025-01-01 | 31.15.14.3 |
| mta.a1-computers.cz | 2025-01-01 | 31.15.14.3 |
| mailer.a1-computers.cz | 2025-01-01 | 31.15.14.3 |
| mailhost.a1-computers.cz | 2024-12-05 | 31.15.14.3 |
| mailsrv.a1-computers.cz | 2024-11-04 | 31.15.14.3 |