| Date | IP Address |
| 2021-01-26 | 104.119.189.232 (ClassC) |
| 2025-01-12 | 23.219.78.204 (ClassC) |
| 2025-01-23 | 23.209.116.51 (ClassC) |
| 2025-06-10 | 23.215.176.49 (ClassC) |
| 2025-07-15 | 23.55.168.34 (ClassC) |
| 2025-08-02 | 104.96.203.56 (ClassC) |
| 2025-08-19 | 23.46.228.6 (ClassC) |
| 2025-09-25 | 23.46.228.5 (ClassC) |
| Date | Domain | IP |
| mx02.c4isrnet.com | 2024-08-30 | 104.96.163.81 |
| a2.c4isrnet.com | 2015-03-30 | 165.254.114.113 |
| mail7.c4isrnet.com | 2025-01-12 | 23.219.78.204 |
| barracuda.c4isrnet.com | 2024-12-11 | 23.213.175.218 |
| srepdata.c4isrnet.com | 2024-08-13 | 63.140.37.126 |
| beta.c4isrnet.com | 2024-03-19 | 184.28.93.17 |
| 777me.c4isrnet.com | 2025-01-24 | 23.46.228.6 |
| archive.c4isrnet.com | 2015-02-26 | 205.234.218.34 |
| webmail.c4isrnet.com | 2024-02-15 | 23.219.78.179 |
| spam.c4isrnet.com | 2025-01-22 | 23.34.172.49 |
| mxs.c4isrnet.com | 2024-12-27 | 104.96.203.10 |
| pinghu.c4isrnet.com | 2024-07-12 | 23.215.176.49 |
| www.c4isrnet.com | 2014-11-16 | 165.254.206.200 |