| Date | IP Address |
| 2021-04-12 | 54.230.139.113 (ClassC) |
| 2021-04-12 | 54.230.139.72 (ClassC) |
| 2024-07-06 | 3.163.24.56 (ClassC) |
| 2024-08-29 | 3.163.24.74 (ClassC) |
| 2025-04-30 | 204.246.191.43 (ClassC) |
| 2025-08-10 | 204.246.191.28 (ClassC) |
| Date | Domain | IP |
| www.yokoi-tax.jp | 2024-03-15 | 204.246.191.28 |