| Date | IP Address |
| 2025-01-16 | 183.181.83.89 (ClassC) |
| Date | Domain | IP |
| mail1.sakura-works.org | 2024-11-01 | 183.181.83.89 |
| imap2.sakura-works.org | 2024-10-20 | 183.181.83.89 |
| office.sakura-works.org | 2024-11-30 | 183.181.83.89 |
| remote.sakura-works.org | 2025-01-16 | 183.181.83.89 |
| portal.sakura-works.org | 2024-10-21 | 183.181.83.89 |
| mailer.sakura-works.org | 2025-01-16 | 183.181.83.89 |
| dev.sakura-works.org | 2024-11-14 | 183.181.83.89 |
| mailgw.sakura-works.org | 2025-01-02 | 183.181.83.89 |