| Date | IP Address |
| 2024-11-04 | 81.95.99.218 (ClassC) |
| Date | Domain | IP |
| mx0.defbeton.cz | 2024-09-17 | 81.95.99.218 |
| server1.defbeton.cz | 2024-09-17 | 81.95.99.218 |
| mx1.defbeton.cz | 2024-06-11 | 81.95.99.218 |
| smtp3.defbeton.cz | 2024-08-30 | 81.95.99.218 |
| mail4.defbeton.cz | 2024-06-30 | 81.95.99.218 |
| mail8.defbeton.cz | 2024-06-13 | 81.95.99.218 |
| poczta.defbeton.cz | 2024-09-20 | 81.95.99.218 |
| calc.defbeton.cz | 2024-06-03 | 81.95.99.218 |
| www.calc.defbeton.cz | 2024-07-07 | 81.95.99.218 |
| outmail.defbeton.cz | 2024-06-18 | 81.95.99.218 |
| zmail.defbeton.cz | 2024-11-04 | 81.95.99.218 |
| spam.defbeton.cz | 2024-11-04 | 81.95.99.218 |
| mailer.defbeton.cz | 2024-09-17 | 81.95.99.218 |
| postmaster.defbeton.cz | 2024-09-17 | 81.95.99.218 |
| server.defbeton.cz | 2024-07-02 | 81.95.99.218 |
| smtps.defbeton.cz | 2024-09-17 | 81.95.99.218 |
| root.defbeton.cz | 2024-06-06 | 81.95.99.218 |
| mailhost.defbeton.cz | 2024-08-22 | 81.95.99.218 |
| out.defbeton.cz | 2024-10-17 | 81.95.99.218 |
| mailsrv.defbeton.cz | 2024-08-24 | 81.95.99.218 |
| mailbox.defbeton.cz | 2024-07-29 | 81.95.99.218 |