| Date | IP Address |
| 2020-05-29 | 52.55.138.40 (ClassC) |
| 2021-09-01 | 52.202.50.179 (ClassC) |
| 2024-08-31 | 44.210.250.122 (ClassC) |
| 2024-11-27 | 54.208.98.240 (ClassC) |
| 2026-02-16 | 172.66.0.145 (ClassC) |
| 2026-03-05 | 162.159.140.147 (ClassC) |
| Date | Domain | IP |
| locations.postnet.com | 2025-03-04 | 104.16.219.185 |
| support.postnet.com | 2024-08-31 | 44.210.250.122 |
| www.postnet.com | 2025-09-13 | 141.193.213.10 |
| sky.postnet.com | 2023-12-16 | 104.96.163.151 |