| Date | IP Address |
| 2019-05-29 | 176.28.114.100 (ClassC) |
| 2025-09-09 | 172.67.214.87 (ClassC) |
| 2025-11-23 | 104.21.35.63 (ClassC) |
| Date | Domain | IP |
| hestia.itsduero.es | 2025-09-18 | 176.28.114.100 |
| webmail.itsduero.es | 2025-10-23 | 176.28.114.100 |
| correo.itsduero.es | 2025-11-23 | 176.28.114.100 |
| ftp.itsduero.es | 2025-09-20 | 176.28.114.100 |
| clientes.itsduero.es | 2025-06-01 | 176.28.114.98 |
| mail.clientes.itsduero.es | 2025-06-16 | 176.28.114.98 |
| webmail.clientes.itsduero.es | 2025-11-23 | 176.28.114.98 |
| ftp.clientes.itsduero.es | 2025-09-14 | 176.28.114.98 |
| www.clientes.itsduero.es | 2025-11-23 | 176.28.114.98 |
| www.itsduero.es | 2025-07-07 | 172.67.214.87 |
| relay.itsduero.es | 2025-11-23 | 176.28.114.100 |