| Date | IP Address |
| 2021-07-30 | 65.8.48.108 (ClassC) |
| 2021-07-30 | 65.8.48.27 (ClassC) |
| 2021-08-13 | 65.8.56.69 (ClassC) |
| 2021-08-19 | 13.249.75.27 (ClassC) |
| 2021-08-19 | 13.249.75.79 (ClassC) |
| 2021-09-08 | 52.85.89.65 (ClassC) |
| 2021-10-06 | 65.8.158.13 (ClassC) |
| 2021-10-22 | 54.192.58.28 (ClassC) |
| 2022-01-26 | 18.67.65.33 (ClassC) |
| 2022-01-26 | 18.67.65.94 (ClassC) |
| 2024-09-18 | 18.161.6.16 (ClassC) |
| 2024-12-05 | 18.238.238.109 (ClassC) |
| 2025-01-14 | 18.238.238.18 (ClassC) |
| 2025-02-14 | 18.161.6.17 (ClassC) |
| 2025-03-09 | 18.238.238.61 (ClassC) |
| 2025-03-15 | 18.161.6.129 (ClassC) |
| 2025-06-07 | 18.161.6.49 (ClassC) |
| 2025-09-12 | 3.169.173.89 (ClassC) |
| 2025-10-23 | 3.169.173.88 (ClassC) |
| 2026-01-14 | 3.169.173.40 (ClassC) |
| Date | Domain | IP |
| bc.ef.co.kr | 2024-09-18 | 18.161.6.16 |
| www.ef.co.kr | 2014-06-30 | 63.216.54.185 |