| Date | IP Address |
| 2023-08-26 | 3.113.115.235 (ClassC) |
| 2024-02-21 | 52.196.140.197 (ClassC) |
| 2024-08-10 | 57.181.61.171 (ClassC) |
| 2024-10-31 | 54.238.224.215 (ClassC) |
| 2024-11-06 | 43.206.18.34 (ClassC) |
| 2024-11-24 | 52.193.197.195 (ClassC) |
| 2025-01-07 | 3.115.173.173 (ClassC) |
| 2025-02-03 | 54.95.58.59 (ClassC) |
| 2025-03-22 | 52.198.139.185 (ClassC) |
| 2025-04-30 | 13.112.28.94 (ClassC) |
| 2025-05-14 | 52.198.95.15 (ClassC) |
| 2025-09-08 | 35.79.184.62 (ClassC) |
| 2025-11-11 | 52.194.128.178 (ClassC) |
| 2026-02-10 | 54.95.74.73 (ClassC) |
| Date | Domain | IP |
| portal1.tohoku-frontier.co.jp | 2024-07-17 | 203.216.216.3 |
| www.tohoku-frontier.co.jp | 2024-09-01 | 35.72.64.92 |