| Date | IP Address |
| 2026-02-13 | 195.92.41.108 (ClassC) |
| Date | Domain | IP |
| portal.hmprisonservice.gov.uk | 2025-09-13 | 195.92.41.124 |
| gw1-portal.hmprisonservice.gov.uk | 2025-08-06 | 195.92.41.126 |
| gw2-portal.hmprisonservice.gov.uk | 2025-07-03 | 195.92.41.125 |
| gw3-portal.hmprisonservice.gov.uk | 2025-05-16 | 195.92.41.123 |
| extranet.hmprisonservice.gov.uk | 2026-02-13 | 195.92.41.108 |
| gw1-extranet.hmprisonservice.gov.uk | 2025-07-03 | 195.92.41.110 |
| gw2-extranet.hmprisonservice.gov.uk | 2025-09-13 | 195.92.41.109 |