| Date | IP Address |
| 2021-08-18 | 18.168.173.203 (ClassC) |
| 2023-11-30 | 18.135.158.17 (ClassC) |
| 2026-01-13 | 35.177.237.11 (ClassC) |
| 2026-01-29 | 13.135.69.84 (ClassC) |
| Date | Domain | IP |
| securemail2.clearswift.com | 2022-05-27 | 13.59.0.211 |
| download.clearswift.com | 2023-11-24 | 52.217.206.89 |
| time.clearswift.com | 2023-09-29 | 5.78.89.3 |
| applianceupdate.clearswift.com | 2025-04-16 | 40.113.232.243 |
| securemail.clearswift.com | 2026-01-13 | 35.177.237.11 |
| cdn.clearswift.com | 2015-02-05 | 54.230.90.37 |
| www.clearswift.com | 2023-10-27 | 104.18.13.15 |