| Date | IP Address |
| 2019-11-29 | 121.78.79.213 (ClassC) |
| 2021-11-23 | 139.150.73.108 (ClassC) |
| 2022-01-24 | 175.126.176.34 (ClassC) |
| 2022-03-26 | 175.126.77.145 (ClassC) |
| 2024-05-19 | 13.226.22.92 (ClassC) |
| 2024-05-19 | 13.226.22.36 (ClassC) |
| 2024-05-19 | 13.226.22.37 (ClassC) |
| 2024-05-19 | 13.226.22.61 (ClassC) |
| 2024-07-08 | 3.160.196.75 (ClassC) |
| 2024-08-18 | 18.238.136.109 (ClassC) |
| 2024-08-18 | 18.238.136.36 (ClassC) |
| 2024-08-18 | 18.238.136.101 (ClassC) |
| 2024-08-18 | 18.238.136.106 (ClassC) |
| 2024-10-10 | 18.160.10.33 (ClassC) |
| 2024-10-10 | 18.160.10.86 (ClassC) |
| 2024-10-10 | 18.160.10.99 (ClassC) |
| 2024-10-10 | 18.160.10.127 (ClassC) |
| 2024-11-24 | 18.65.229.86 (ClassC) |
| 2025-03-15 | 18.160.225.129 (ClassC) |
| 2025-03-15 | 18.160.225.97 (ClassC) |
| 2025-03-15 | 18.160.225.109 (ClassC) |
| 2025-03-15 | 18.160.225.113 (ClassC) |
| 2025-08-16 | 99.84.66.77 (ClassC) |
| 2025-08-21 | 99.84.66.74 (ClassC) |
| 2025-09-10 | 204.246.191.69 (ClassC) |
| 2025-09-13 | 3.163.24.55 (ClassC) |
| 2025-09-17 | 204.246.191.32 (ClassC) |
| 2025-09-24 | 204.246.191.53 (ClassC) |
| 2025-11-15 | 3.163.24.36 (ClassC) |
| 2025-12-02 | 3.163.24.123 (ClassC) |
| Date | Domain | IP |
| www.m-letter.or.kr | 2024-11-24 | 18.65.229.86 |