| Date | IP Address |
| 2021-08-30 | 13.225.206.20 (ClassC) |
| 2024-09-01 | 35.72.64.92 (ClassC) |
| 2024-11-06 | 52.199.47.229 (ClassC) |
| 2024-11-24 | 3.115.173.173 (ClassC) |
| 2024-12-26 | 52.193.197.195 (ClassC) |
| 2025-05-07 | 13.112.28.94 (ClassC) |
| 2025-06-26 | 52.199.217.194 (ClassC) |
| 2025-08-05 | 18.178.166.183 (ClassC) |
| 2025-08-10 | 13.230.186.201 (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 |