| Date | IP Address |
| 2021-08-21 | 184.25.237.137 (ClassC) |
| 2021-10-25 | 204.237.204.80 (ClassC) |
| 2022-10-31 | 23.56.99.90 (ClassC) |
| 2023-11-07 | 184.28.249.72 (ClassC) |
| 2024-03-13 | 104.93.21.97 (ClassC) |
| 2024-12-19 | 23.44.175.191 (ClassC) |
| 2025-04-23 | 23.41.4.18 (ClassC) |
| 2026-02-15 | 23.192.230.140 (ClassC) |
| Date | Domain | IP |
| biznex-stg2.tohogas.co.jp | 2025-03-19 | 99.84.66.72 |
| image.ma.tohogas.co.jp | 2024-12-19 | 23.44.175.191 |
| search.tohogas.co.jp | 2025-11-17 | 203.216.194.146 |
| www.tohogas.co.jp | 2025-07-18 | 61.113.179.19 |
| biznex.tohogas.co.jp | 2024-12-11 | 204.246.191.109 |