| Date | IP Address |
| 2020-05-25 | 23.54.164.145 (ClassC) |
| 2025-02-06 | 23.59.252.99 (ClassC) |
| 2025-02-11 | 23.38.191.154 (ClassC) |
| 2025-09-18 | 23.41.4.91 (ClassC) |
| 2026-02-20 | 23.41.4.82 (ClassC) |
| Date | Domain | IP |
| ib.tsukubabank.co.jp | 2024-05-24 | 104.16.106.60 |
| www.tsukubabank.co.jp | 2025-02-06 | 23.59.252.99 |