| Date | IP Address |
| 2020-08-19 | 143.204.0.125 (ClassC) |
| 2020-08-19 | 143.204.0.75 (ClassC) |
| 2021-04-15 | 13.225.55.126 (ClassC) |
| 2021-07-14 | 52.85.89.91 (ClassC) |
| 2021-11-15 | 18.67.65.80 (ClassC) |
| 2024-03-16 | 99.84.66.82 (ClassC) |
| 2024-09-11 | 18.161.6.70 (ClassC) |
| 2025-01-13 | 3.163.165.78 (ClassC) |
| 2025-04-14 | 99.84.66.4 (ClassC) |
| 2025-07-19 | 99.84.66.101 (ClassC) |
| 2026-02-14 | 18.161.6.112 (ClassC) |
| Date | Domain | IP |
| cc.core.co.jp | 2025-11-19 | 125.103.67.84 |
| info.core.co.jp | 2024-03-16 | 99.84.66.82 |
| www.core.co.jp | 2025-07-21 | 113.40.88.155 |