| Date | IP Address |
| 2021-12-08 | 54.230.15.7 (ClassC) |
| 2025-10-28 | 3.169.173.126 (ClassC) |
| Date | Domain | IP |
| dev01.tokyo-gas-knowledge-sharing.com | 2024-11-13 | 52.68.255.12 |
| auth.dev01.tokyo-gas-knowledge-sharing.com | 2024-09-04 | 18.161.6.11 |
| api.dev01.tokyo-gas-knowledge-sharing.com | 2024-06-26 | 99.84.66.107 |
| contents.dev01.tokyo-gas-knowledge-sharing.com | 2024-06-30 | 18.161.6.44 |
| stg.tokyo-gas-knowledge-sharing.com | 2024-06-03 | 52.192.213.166 |
| auth.stg.tokyo-gas-knowledge-sharing.com | 2025-01-03 | 52.84.162.33 |
| api.stg.tokyo-gas-knowledge-sharing.com | 2024-07-21 | 99.84.66.100 |
| api.tokyo-gas-knowledge-sharing.com | 2024-09-24 | 18.161.6.76 |
| auth.uat.tokyo-gas-knowledge-sharing.com | 2024-12-07 | 99.86.38.63 |
| api.uat.tokyo-gas-knowledge-sharing.com | 2025-10-28 | 3.169.173.126 |