| Date | IP Address |
| 2021-01-11 | 202.74.224.54 (ClassC) |
| 2025-12-09 | 172.67.153.240 (ClassC) |
| Date | Domain | IP |
| mx10.sudimachristchurch.co.nz | 2025-12-11 | 172.67.153.240 |
| smtp1.sudimachristchurch.co.nz | 2025-12-09 | 172.67.153.240 |
| relay2.sudimachristchurch.co.nz | 2025-11-30 | 104.21.12.241 |
| mail3.sudimachristchurch.co.nz | 2025-12-09 | 104.21.12.241 |
| pop3.sudimachristchurch.co.nz | 2025-12-01 | 172.67.153.240 |
| exchange.sudimachristchurch.co.nz | 2025-12-11 | 172.67.153.240 |
| mailgate.sudimachristchurch.co.nz | 2025-12-11 | 172.67.153.240 |
| remote.sudimachristchurch.co.nz | 2025-12-09 | 104.21.12.241 |
| outmail.sudimachristchurch.co.nz | 2025-12-11 | 104.21.12.241 |
| gateway.sudimachristchurch.co.nz | 2025-12-02 | 172.67.153.240 |