| Date | IP Address |
| 2019-08-23 | 3.212.69.118 (ClassC) |
| 2019-09-22 | 54.82.135.177 (ClassC) |
| 2020-01-21 | 52.3.193.175 (ClassC) |
| 2020-04-21 | 18.206.31.180 (ClassC) |
| 2021-09-05 | 3.213.68.231 (ClassC) |
| 2022-05-21 | 3.234.44.52 (ClassC) |
| 2024-03-10 | 3.208.108.208 (ClassC) |
| 2024-03-14 | 44.198.35.55 (ClassC) |
| 2024-10-09 | 3.232.187.198 (ClassC) |
| 2024-11-25 | 18.235.245.181 (ClassC) |
| 2025-01-01 | 35.153.75.209 (ClassC) |
| 2025-01-14 | 34.194.200.32 (ClassC) |
| Date | Domain | IP |
| www.yisseoul.org | 2024-11-26 | 198.185.159.145 |
| schoology.yisseoul.org | 2024-03-10 | 3.208.108.208 |