| Date | IP Address |
| 2014-06-25 | 63.80.4.187 (ClassC) |
| 2014-06-30 | 63.216.54.185 (ClassC) |
| 2017-06-29 | 173.222.148.32 (ClassC) |
| 2017-07-12 | 184.25.56.139 (ClassC) |
| 2017-07-12 | 184.25.56.156 (ClassC) |
| 2017-07-13 | 65.152.202.32 (ClassC) |
| 2017-09-09 | 5.178.42.34 (ClassC) |
| 2024-10-01 | 104.16.78.72 (ClassC) |
| 2024-11-20 | 104.16.77.72 (ClassC) |
| 2024-12-20 | 104.18.11.139 (ClassC) |
| 2025-01-13 | 104.18.10.139 (ClassC) |
| Date | Domain | IP |
| bc.ef.co.kr | 2024-08-03 | 18.238.238.61 |
| www.ef.co.kr | 2014-06-30 | 63.216.54.185 |