| Date | IP Address |
| 2019-07-27 | 75.150.171.217 (ClassC) |
| 2019-09-25 | 108.177.112.27 (ClassC) |
| 2019-09-26 | 172.217.212.26 (ClassC) |
| 2019-11-25 | 172.217.212.27 (ClassC) |
| 2020-03-26 | 74.125.129.27 (ClassC) |
| 2020-05-08 | 173.194.197.27 (ClassC) |
| 2020-07-08 | 108.177.112.26 (ClassC) |
| 2020-11-07 | 209.85.147.27 (ClassC) |
| 2020-11-08 | 173.194.74.26 (ClassC) |
| 2021-01-07 | 108.177.111.27 (ClassC) |
| 2021-01-07 | 108.177.121.27 (ClassC) |
| 2021-03-10 | 142.250.125.26 (ClassC) |
| 2024-08-14 | 173.194.203.26 (ClassC) |
| 2024-12-26 | 74.125.195.26 (ClassC) |
| 2025-04-25 | 173.194.202.27 (ClassC) |
| 2025-06-04 | 74.125.199.27 (ClassC) |
| 2025-09-08 | 74.125.142.27 (ClassC) |
| 2026-02-21 | 192.178.163.26 (ClassC) |
| Date | Domain | IP |
| mail.vistaunderwriting.com | 2024-08-14 | 173.194.203.26 |
| autodiscover.vistaunderwriting.com | 2025-01-13 | 142.250.107.27 |