| Date | IP Address |
| 2018-10-10 | 52.84.141.245 (ClassC) |
| 2018-10-10 | 52.84.141.103 (ClassC) |
| 2018-10-10 | 52.84.141.7 (ClassC) |
| 2018-10-10 | 52.84.141.119 (ClassC) |
| 2018-11-06 | 13.33.251.5 (ClassC) |
| 2018-11-06 | 13.33.251.6 (ClassC) |
| 2018-11-06 | 13.33.251.65 (ClassC) |
| 2018-11-06 | 13.33.251.41 (ClassC) |
| 2018-11-14 | 52.84.141.116 (ClassC) |
| 2018-11-14 | 52.84.141.75 (ClassC) |
| 2018-11-14 | 52.84.141.95 (ClassC) |
| 2018-11-14 | 52.84.141.160 (ClassC) |
| 2020-02-25 | 13.249.89.129 (ClassC) |
| 2020-02-25 | 13.249.89.13 (ClassC) |
| 2020-02-25 | 13.249.89.91 (ClassC) |
| 2020-08-02 | 13.249.94.34 (ClassC) |
| 2020-08-02 | 13.249.94.6 (ClassC) |
| 2020-08-02 | 13.249.94.116 (ClassC) |
| 2020-09-08 | 52.84.23.89 (ClassC) |
| 2020-09-22 | 13.249.95.9 (ClassC) |
| 2020-09-22 | 13.249.95.99 (ClassC) |
| 2020-11-17 | 143.204.217.84 (ClassC) |
| 2024-07-05 | 204.246.191.26 (ClassC) |
| 2025-01-12 | 52.84.162.4 (ClassC) |
| 2025-01-28 | 52.84.162.12 (ClassC) |
| 2025-04-28 | 204.246.191.2 (ClassC) |
| 2025-05-30 | 204.246.191.54 (ClassC) |
| 2025-06-19 | 52.84.162.40 (ClassC) |
| 2025-07-28 | 204.246.191.64 (ClassC) |
| 2025-09-04 | 18.161.6.57 (ClassC) |
| 2026-01-19 | 3.169.173.38 (ClassC) |
| Date | Domain | IP |
| public.realclass.co.kr | 2025-03-17 | 99.84.66.113 |
| cf.realclass.co.kr | 2024-07-05 | 204.246.191.26 |
| admin.realclass.co.kr | 2024-07-20 | 3.36.157.175 |
| www.realclass.co.kr | 2024-07-08 | 3.163.24.77 |