| Date | IP Address |
| 2023-08-04 | 43.200.54.205 (ClassC) |
| 2023-11-10 | 43.200.132.194 (ClassC) |
| 2024-04-23 | 43.202.20.211 (ClassC) |
| 2024-05-05 | 54.180.12.141 (ClassC) |
| 2024-06-15 | 43.202.135.224 (ClassC) |
| 2024-07-02 | 3.38.58.37 (ClassC) |
| 2024-07-24 | 43.202.28.230 (ClassC) |
| 2024-08-11 | 43.200.156.76 (ClassC) |
| 2024-09-02 | 3.34.230.225 (ClassC) |
| 2024-09-10 | 13.124.41.250 (ClassC) |
| 2024-09-19 | 52.79.214.155 (ClassC) |
| 2024-10-06 | 52.78.155.1 (ClassC) |
| 2024-10-11 | 43.203.4.201 (ClassC) |
| 2024-10-19 | 43.202.16.123 (ClassC) |
| 2024-10-27 | 52.78.211.86 (ClassC) |
| 2024-11-06 | 43.202.141.228 (ClassC) |
| 2024-12-01 | 43.200.42.80 (ClassC) |
| 2025-01-02 | 3.39.66.244 (ClassC) |
| Date | Domain | IP |
| file.class123.kr | 2024-02-23 | 204.246.191.46 |
| img.class123.kr | 2024-02-25 | 204.246.191.97 |
| cdn.class123.kr | 2016-08-05 | 104.24.23.28 |
| m-cdn.class123.kr | 2024-06-27 | 3.163.24.57 |
| student-cdn.class123.kr | 2021-02-28 | 54.230.126.40 |
| parent-cdn.class123.kr | 2024-02-27 | 18.161.6.78 |
| qa-video.class123.kr | 2024-07-11 | 18.161.6.124 |
| dev-video.class123.kr | 2024-11-09 | 3.163.24.127 |
| s-attachment.class123.kr | 2024-07-19 | 99.84.66.107 |