| Date | IP Address |
| 2023-11-01 | 204.246.191.44 (ClassC) |
| 2024-03-02 | 204.246.191.42 (ClassC) |
| 2024-04-10 | 204.246.191.55 (ClassC) |
| 2024-12-02 | 108.138.94.48 (ClassC) |
| 2025-03-17 | 18.161.6.16 (ClassC) |
| 2025-09-13 | 204.246.191.64 (ClassC) |
| 2026-02-12 | 3.175.34.15 (ClassC) |
| Date | Domain | IP |
| dev-dh-01.firstnavi.jp | 2024-10-02 | 18.161.6.46 |
| kaigo.firstnavi.jp | 2024-08-08 | 204.246.191.99 |
| kango.firstnavi.jp | 2024-02-12 | 108.138.246.82 |
| dentist.firstnavi.jp | 2025-03-09 | 18.161.6.122 |
| www.firstnavi.jp | 2023-11-01 | 204.246.191.44 |