| Date | IP Address |
| 2022-03-22 | 65.8.236.37 (ClassC) |
| 2022-03-22 | 65.8.236.46 (ClassC) |
| 2023-11-01 | 199.91.74.218 (ClassC) |
| 2024-08-12 | 199.91.74.187 (ClassC) |
| 2024-08-15 | 199.91.74.219 (ClassC) |
| 2024-08-22 | 199.91.74.216 (ClassC) |
| 2024-09-28 | 199.91.74.214 (ClassC) |
| 2024-11-18 | 199.91.74.220 (ClassC) |
| 2024-11-26 | 199.91.74.178 (ClassC) |
| 2025-04-11 | 43.175.165.149 (ClassC) |
| 2025-04-16 | 43.175.7.147 (ClassC) |
| 2026-03-08 | 43.175.7.185 (ClassC) |
| Date | Domain | IP |
| waitingroom-oqs.census2021.gov.hk | 2024-09-28 | 54.73.32.189 |
| www.census2021.gov.hk | 2023-11-01 | 199.91.74.218 |