| Date | IP Address |
| 2025-10-14 | 203.129.90.23 (ClassC) |
| Date | Domain | IP |
| cdnns01.hgc.com.hk | 2025-09-08 | 118.143.251.105 |
| cdnns02.hgc.com.hk | 2025-09-06 | 203.184.245.105 |
| partnerweb.hgc.com.hk | 2025-09-08 | 202.45.83.111 |
| educloud.hgc.com.hk | 2025-09-12 | 203.129.70.36 |
| admin.educloud.hgc.com.hk | 2025-10-14 | 203.129.90.23 |
| service.hgc.com.hk | 2025-09-13 | 203.184.192.123 |
| online.hgc.com.hk | 2025-08-14 | 203.184.225.100 |
| test-portal-api.hgc.com.hk | 2024-12-26 | 3.0.237.221 |
| test-api.hgc.com.hk | 2024-12-26 | 54.179.114.20 |
| login.hgc.com.hk | 2025-07-01 | 203.184.192.186 |
| autodiscover.hgc.com.hk | 2025-01-18 | 52.96.164.232 |
| ookla-speedtest-central.hgconair.hgc.com.hk | 2025-09-12 | 210.0.250.30 |
| login.letslistentoemail.worktools.hgc.com.hk | 2025-09-10 | 218.188.81.229 |
| login.letsanswer.worktools.hgc.com.hk | 2025-09-10 | 218.188.70.82 |
| sims.hgc.com.hk | 2025-09-08 | 203.184.192.216 |
| vms.hgc.com.hk | 2025-06-21 | 203.184.192.124 |
| lsmeet.hgc.com.hk | 2025-09-12 | 213.94.80.212 |
| payment.hgc.com.hk | 2025-09-12 | 203.184.225.139 |
| www.hgc.com.hk | 2023-12-03 | 13.107.213.70 |