| Date | IP Address |
| 2019-09-20 | 23.42.158.10 (ClassC) |
| 2020-06-30 | 23.54.164.140 (ClassC) |
| 2022-02-03 | 23.64.114.7 (ClassC) |
| 2024-05-22 | 23.220.103.11 (ClassC) |
| 2024-07-24 | 23.46.17.36 (ClassC) |
| 2025-04-24 | 23.46.228.172 (ClassC) |
| 2025-12-24 | 23.216.147.196 (ClassC) |
| 2026-02-21 | 23.216.147.198 (ClassC) |
| Date | Domain | IP |
| image.email.costar.co.uk | 2025-04-01 | 23.32.75.4 |
| www-tsm.costar.co.uk | 2024-06-28 | 23.46.17.36 |
| www-dvm.costar.co.uk | 2024-09-21 | 104.98.114.177 |
| www-tsr.costar.co.uk | 2024-07-24 | 23.46.17.36 |
| wwwtest.costar.co.uk | 2023-08-25 | 23.198.174.29 |
| www.costar.co.uk | 2023-08-26 | 104.100.64.151 |