| Date | IP Address |
| 2018-10-13 | 23.72.82.56 (ClassC) |
| 2019-08-29 | 23.48.210.154 (ClassC) |
| 2019-11-05 | 165.254.94.235 (ClassC) |
| 2020-04-25 | 172.232.3.11 (ClassC) |
| 2020-05-22 | 96.17.11.185 (ClassC) |
| 2020-08-15 | 2.16.172.139 (ClassC) |
| 2020-09-11 | 23.197.195.48 (ClassC) |
| 2020-09-19 | 23.223.202.203 (ClassC) |
| 2020-11-08 | 104.94.100.178 (ClassC) |
| 2021-06-09 | 65.8.227.126 (ClassC) |
| 2021-06-30 | 65.8.228.14 (ClassC) |
| 2021-08-31 | 54.230.161.18 (ClassC) |
| 2021-08-31 | 54.230.161.107 (ClassC) |
| 2021-08-31 | 54.230.161.124 (ClassC) |
| 2022-02-03 | 13.226.31.67 (ClassC) |
| 2023-11-01 | 3.163.24.6 (ClassC) |
| 2024-02-28 | 204.246.191.64 (ClassC) |
| 2025-05-12 | 172.67.21.9 (ClassC) |
| 2025-06-15 | 104.22.71.217 (ClassC) |
| 2025-06-18 | 104.22.70.217 (ClassC) |
| 2025-12-04 | 172.66.171.126 (ClassC) |
| 2026-02-24 | 104.20.29.217 (ClassC) |
| Date | Domain | IP |
| mail1.kosu.org | 2024-10-08 | 104.22.71.217 |
| relay2.kosu.org | 2024-10-09 | 104.22.71.217 |
| mail7.kosu.org | 2025-04-25 | 104.22.71.217 |
| mx7.kosu.org | 2025-05-06 | 104.22.71.217 |
| poczta.kosu.org | 2025-04-28 | 172.67.21.9 |
| exchange.kosu.org | 2025-01-16 | 104.22.70.217 |
| comune.kosu.org | 2025-04-25 | 104.22.70.217 |
| mail.comune.kosu.org | 2024-09-24 | 172.67.21.9 |
| smtp.comune.kosu.org | 2025-02-09 | 104.22.71.217 |
| email.kosu.org | 2025-04-26 | 104.22.70.217 |
| mailin.kosu.org | 2024-12-04 | 104.22.71.217 |
| imap.kosu.org | 2025-04-13 | 104.22.71.217 |
| postmaster.kosu.org | 2025-04-28 | 172.67.21.9 |
| mailhost.kosu.org | 2025-02-09 | 104.22.71.217 |
| post.kosu.org | 2025-02-03 | 104.22.71.217 |
| www.kosu.org | 2023-11-01 | 3.163.24.6 |
| box.kosu.org | 2025-02-09 | 104.22.70.217 |