| Date | IP Address |
| 2018-03-26 | 52.21.1.126 (ClassC) |
| 2024-07-27 | 104.18.18.37 (ClassC) |
| 2025-07-21 | 172.64.153.235 (ClassC) |
| 2025-12-11 | 104.18.34.21 (ClassC) |
| Date | Domain | IP |
| na2.esker.com | 2025-11-15 | 64.73.120.239 |
| as1.ondemand.esker.com | 2025-09-03 | 213.41.42.89 |
| az3.ondemand.esker.com | 2025-12-03 | 20.197.74.204 |
| we4.ondemand.esker.com | 2023-08-26 | 40.67.217.90 |
| ae5.ondemand.esker.com | 2023-08-25 | 20.40.180.74 |
| cc6.ondemand.esker.com | 2025-11-21 | 52.237.50.89 |
| ne7.ondemand.esker.com | 2025-09-22 | 20.223.16.118 |
| ftp.ondemand.esker.com | 2025-09-12 | 213.41.42.89 |
| ww.ondemand.esker.com | 2025-09-03 | 213.41.42.91 |
| webmail.esker.com | 2025-12-06 | 204.246.8.105 |
| sl.esker.com | 2025-04-25 | 52.0.63.6 |
| go.esker.com | 2024-11-14 | 104.17.74.206 |
| get.esker.com | 2024-07-27 | 104.18.18.37 |
| www.esker.com | 2025-09-03 | 23.21.149.125 |
| university.esker.com | 2024-06-15 | 34.250.93.226 |