| Date | IP Address |
| 2023-11-01 | 52.79.238.89 (ClassC) |
| 2023-11-19 | 13.124.63.9 (ClassC) |
| 2024-05-31 | 3.37.27.149 (ClassC) |
| 2024-07-24 | 54.180.58.228 (ClassC) |
| 2024-09-15 | 3.35.112.128 (ClassC) |
| 2024-09-22 | 43.200.36.212 (ClassC) |
| 2024-11-18 | 3.39.19.226 (ClassC) |
| 2024-11-24 | 15.165.250.29 (ClassC) |
| 2025-01-04 | 15.165.87.201 (ClassC) |
| 2025-01-11 | 13.209.207.223 (ClassC) |
| 2025-02-04 | 52.79.126.206 (ClassC) |
| 2025-03-05 | 52.79.141.60 (ClassC) |
| 2025-03-24 | 54.180.211.184 (ClassC) |
| 2025-04-14 | 52.79.170.192 (ClassC) |
| 2025-05-01 | 43.201.225.87 (ClassC) |
| 2025-06-18 | 43.203.65.148 (ClassC) |
| 2026-01-28 | 3.36.25.99 (ClassC) |
| Date | Domain | IP |
| api-v4.classu.co.kr | 2025-10-08 | 13.209.237.109 |
| cdn.classu.co.kr | 2024-10-03 | 204.246.191.113 |
| www.classu.co.kr | 2024-11-24 | 18.238.238.57 |