| Date | IP Address |
| 2021-04-11 | 213.48.96.31 (ClassC) |
| 2026-01-19 | 18.135.223.82 (ClassC) |
| Date | Domain | IP |
| smtp1.primaryteachingonline.co.uk | 2025-08-31 | 18.135.223.82 |
| mx1.primaryteachingonline.co.uk | 2025-08-08 | 18.135.223.82 |
| mx3.primaryteachingonline.co.uk | 2025-07-02 | 18.135.223.82 |
| mail4.primaryteachingonline.co.uk | 2025-08-18 | 18.135.223.82 |
| mx4.primaryteachingonline.co.uk | 2026-01-01 | 18.135.223.82 |
| mx7.primaryteachingonline.co.uk | 2025-11-19 | 18.135.223.82 |
| poczta.primaryteachingonline.co.uk | 2025-12-14 | 18.135.223.82 |
| live.primaryteachingonline.co.uk | 2026-01-10 | 18.135.223.82 |
| l.primaryteachingonline.co.uk | 2026-01-11 | 18.135.223.82 |
| imap.primaryteachingonline.co.uk | 2025-09-08 | 18.135.223.82 |
| smtp.primaryteachingonline.co.uk | 2025-06-28 | 18.135.223.82 |
| mailserver.primaryteachingonline.co.uk | 2026-01-19 | 18.135.223.82 |
| www.primaryteachingonline.co.uk | 2025-06-08 | 18.135.223.82 |
| mx.primaryteachingonline.co.uk | 2025-08-19 | 18.135.223.82 |
| a.mx.primaryteachingonline.co.uk | 2025-12-03 | 18.135.223.82 |