| Date | IP Address |
| 2020-03-11 | 13.209.54.128 (ClassC) |
| 2020-03-11 | 15.164.151.233 (ClassC) |
| 2021-01-28 | 13.32.181.113 (ClassC) |
| 2021-01-28 | 13.32.181.49 (ClassC) |
| 2021-02-08 | 54.230.137.126 (ClassC) |
| 2021-02-08 | 54.230.137.41 (ClassC) |
| 2021-02-08 | 54.230.137.5 (ClassC) |
| 2021-02-08 | 54.230.137.10 (ClassC) |
| 2022-09-19 | 18.244.202.75 (ClassC) |
| 2024-01-05 | 18.161.84.48 (ClassC) |
| 2024-07-18 | 3.162.38.6 (ClassC) |
| 2024-07-24 | 99.84.66.48 (ClassC) |
| 2025-01-15 | 99.84.66.100 (ClassC) |
| 2025-05-14 | 99.84.66.66 (ClassC) |
| 2025-08-06 | 99.84.66.34 (ClassC) |
| 2026-01-21 | 3.169.173.21 (ClassC) |
| Date | Domain | IP |
| mail.hcorp.co.kr | 2025-07-09 | 58.72.117.98 |
| spam.hcorp.co.kr | 2025-12-10 | 58.72.117.100 |
| gw.hcorp.co.kr | 2025-05-13 | 58.72.117.98 |