| Date | IP Address |
| 2025-01-28 | 4.2.53.78 (ClassC) |
| 2026-02-16 | 40.71.37.115 (ClassC) |
| Date | Domain | IP |
| owa.hazenandsawyer.com | 2025-01-25 | 4.2.53.78 |
| gisportal.hazenandsawyer.com | 2025-03-10 | 20.10.116.12 |
| mail.hazenandsawyer.com | 2025-01-28 | 4.2.53.78 |
| ftp.hazenandsawyer.com | 2025-11-24 | 38.105.185.23 |
| autodiscover.hazenandsawyer.com | 2024-11-21 | 40.99.226.136 |
| gis.hazenandsawyer.com | 2025-12-09 | 20.10.116.12 |
| hazen-mailsrv.hazenandsawyer.com | 2025-02-04 | 4.2.53.78 |
| www.hazenandsawyer.com | 2025-04-23 | 159.203.157.86 |