| Date | IP Address |
| 2019-08-21 | 50.194.159.145 (ClassC) |
| 2026-01-31 | 50.194.159.151 (ClassC) |
| Date | Domain | IP |
| smtp-1.crsys.com | 2025-11-21 | 50.194.159.151 |
| NS-1.CRSYS.COM | 2018-07-04 | 64.220.196.163 |
| smtp-2.crsys.com | 2025-11-29 | 50.194.159.151 |
| ns-2.crsys.com | 2026-01-31 | 50.194.159.151 |
| NS-3.CRSYS.COM | 2024-03-20 | 50.194.159.145 |
| 50-194-159-145-mail.crsys.com | 2025-07-29 | 50.194.159.151 |
| www.crsys.com | 2025-11-29 | 50.194.159.151 |