| Date | IP Address |
| 2018-09-01 | 23.48.94.65 (ClassC) |
| 2018-09-12 | 23.62.239.90 (ClassC) |
| 2019-01-16 | 65.153.18.176 (ClassC) |
| 2019-02-28 | 184.27.120.2 (ClassC) |
| 2021-01-29 | 184.31.1.147 (ClassC) |
| 2024-08-05 | 23.192.230.139 (ClassC) |
| 2024-11-25 | 23.44.175.169 (ClassC) |
| 2025-07-14 | 23.192.230.133 (ClassC) |
| 2026-01-26 | 23.55.167.27 (ClassC) |
| Date | Domain | IP |
| beta.cairnspostsit.com.au | 2024-09-18 | 104.98.114.146 |
| subscribe.cairnspostsit.com.au | 2024-11-25 | 104.70.127.22 |
| subscriptions.cairnspostsit.com.au | 2024-11-24 | 23.46.17.43 |
| www.cairnspostsit.com.au | 2024-08-05 | 23.192.230.139 |