| Date | IP Address |
| 2018-06-20 | 35.178.8.206 (ClassC) |
| 2025-12-12 | 13.135.29.5 (ClassC) |
| 2026-01-09 | 13.134.109.170 (ClassC) |
| 2026-02-24 | 13.42.239.204 (ClassC) |
| Date | Domain | IP |
| rps-contact.tools.notprod.pttg.homeoffice.gov.uk | 2026-01-03 | 13.134.238.77 |
| fs.calc.test.notprod.pttg.homeoffice.gov.uk | 2025-12-12 | 13.135.29.5 |
| ip.test.notprod.pttg.homeoffice.gov.uk | 2024-05-19 | 3.10.241.126 |
| fs.test.notprod.pttg.homeoffice.gov.uk | 2025-12-12 | 13.135.29.5 |
| fs.calc.dev.notprod.pttg.homeoffice.gov.uk | 2025-12-04 | 13.41.20.186 |
| ip.dev.notprod.pttg.homeoffice.gov.uk | 2025-12-12 | 13.135.29.5 |
| enquiry-rps.dev.notprod.pttg.homeoffice.gov.uk | 2025-09-01 | 13.134.165.165 |