| Date | IP Address |
| 2024-12-25 | 45.60.11.203 (ClassC) |
| Date | Domain | IP |
| woodwing-b.cert.ips-nonprod.hmhco.com | 2024-08-20 | 3.215.252.53 |
| hots-b.cert.ips-nonprod.hmhco.com | 2024-11-25 | 34.195.178.228 |
| hip.cert.ips-nonprod.hmhco.com | 2024-04-12 | 18.210.98.9 |
| webcms.cert.ips-nonprod.hmhco.com | 2024-12-25 | 45.60.11.203 |