| Date | IP Address |
| 2025-04-09 | 46.4.54.187 (ClassC) |
| Date | Domain | IP |
| mx10.1und1.group | 2025-01-21 | 46.4.54.187 |
| smtp01.1und1.group | 2025-01-14 | 46.4.54.187 |
| smtp1.1und1.group | 2025-01-13 | 46.4.54.187 |
| server1.1und1.group | 2025-01-09 | 46.4.54.187 |
| ms1.1und1.group | 2025-01-20 | 46.4.54.187 |
| www1.1und1.group | 2025-02-21 | 46.4.54.187 |
| mx1.1und1.group | 2025-01-08 | 46.4.54.187 |
| relay1.1und1.group | 2025-04-09 | 46.4.54.187 |
| mail02.1und1.group | 2025-01-08 | 46.4.54.187 |
| smtp2.1und1.group | 2025-01-12 | 46.4.54.187 |
| ns2.1und1.group | 2025-01-16 | 46.4.54.187 |
| mx2.1und1.group | 2025-01-13 | 46.4.54.187 |
| pop3.1und1.group | 2025-01-16 | 46.4.54.187 |
| mx5.1und1.group | 2025-01-14 | 46.4.54.187 |
| mail9.1und1.group | 2025-01-10 | 46.4.54.187 |
| poczta.1und1.group | 2025-01-13 | 46.4.54.187 |
| exchange.1und1.group | 2025-01-23 | 46.4.54.187 |
| comune.1und1.group | 2025-01-31 | 46.4.54.187 |
| mail.comune.1und1.group | 2025-01-08 | 46.4.54.187 |
| smtp.comune.1und1.group | 2025-02-10 | 46.4.54.187 |
| secure.1und1.group | 2025-01-11 | 46.4.54.187 |
| smtpauth.1und1.group | 2025-01-13 | 46.4.54.187 |
| helpdesk.1und1.group | 2025-01-13 | 46.4.54.187 |
| webmail.1und1.group | 2025-01-25 | 46.4.54.187 |
| email.1und1.group | 2025-01-22 | 46.4.54.187 |
| outmail.1und1.group | 2025-01-12 | 46.4.54.187 |
| vmail.1und1.group | 2025-01-16 | 46.4.54.187 |
| zmail.1und1.group | 2025-01-09 | 46.4.54.187 |
| m.1und1.group | 2025-01-08 | 46.4.54.187 |
| mailin.1und1.group | 2025-01-13 | 46.4.54.187 |
| correo.1und1.group | 2025-01-16 | 46.4.54.187 |
| po.1und1.group | 2025-01-11 | 46.4.54.187 |
| imap.1und1.group | 2025-01-17 | 46.4.54.187 |
| pop.1und1.group | 2025-01-14 | 46.4.54.187 |
| ftp.1und1.group | 2025-01-12 | 46.4.54.187 |
| authsmtp.1und1.group | 2025-01-12 | 46.4.54.187 |
| mailer.1und1.group | 2025-01-12 | 46.4.54.187 |
| postmaster.1und1.group | 2025-01-13 | 46.4.54.187 |
| server.1und1.group | 2025-02-12 | 46.4.54.187 |
| mailserver.1und1.group | 2025-01-13 | 46.4.54.187 |
| mails.1und1.group | 2025-01-14 | 46.4.54.187 |
| ns.1und1.group | 2025-01-23 | 46.4.54.187 |
| mxs.1und1.group | 2025-01-09 | 46.4.54.187 |
| mailhost.1und1.group | 2025-01-08 | 46.4.54.187 |
| srv.1und1.group | 2025-01-19 | 46.4.54.187 |
| mailsrv.1und1.group | 2025-01-09 | 46.4.54.187 |
| mailgw.1und1.group | 2025-02-09 | 46.4.54.187 |
| mailx.1und1.group | 2025-01-27 | 46.4.54.187 |
| mx.1und1.group | 2025-01-17 | 46.4.54.187 |
| a.mx.1und1.group | 2025-01-09 | 46.4.54.187 |
| box.1und1.group | 2025-01-14 | 46.4.54.187 |
| relay.1und1.group | 2025-01-12 | 46.4.54.187 |