| Date | IP Address |
| 2014-11-28 | 217.199.187.69 (ClassC) |
| 2019-12-06 | 80.82.112.21 (ClassC) |
| 2020-09-09 | 149.255.62.10 (ClassC) |
| 2020-12-08 | 172.67.212.227 (ClassC) |
| 2020-12-08 | 104.18.42.45 (ClassC) |
| 2020-12-08 | 104.18.43.45 (ClassC) |
| 2026-02-21 | 149.255.62.165 (ClassC) |
| Date | Domain | IP |
| webdisk.ncsc.org.uk | 2025-10-25 | 149.255.62.165 |
| cpanel.ncsc.org.uk | 2025-10-02 | 149.255.62.165 |
| mail.ncsc.org.uk | 2025-10-02 | 149.255.62.165 |
| webmail.ncsc.org.uk | 2025-04-28 | 149.255.62.165 |
| cpcalendars.ncsc.org.uk | 2025-10-18 | 149.255.62.165 |
| cpcontacts.ncsc.org.uk | 2025-04-17 | 149.255.62.165 |
| www.ncsc.org.uk | 2025-10-02 | 149.255.62.165 |