| Date | IP Address |
| 2026-02-16 | 210.175.13.75 (ClassC) |
| Date | Domain | IP |
| www2.jsf.or.jp | 2025-05-09 | 210.175.13.85 |
| www3.jsf.or.jp | 2025-06-27 | 210.175.13.68 |
| tam-web.jsf.or.jp | 2025-07-04 | 210.175.13.83 |
| manabi.jsf.or.jp | 2026-02-16 | 210.175.13.75 |
| www.jsf.or.jp | 2025-05-05 | 210.175.13.85 |