| Date | IP Address |
| 2025-01-09 | 52.204.46.73 (ClassC) |
| 2025-01-16 | 54.196.44.15 (ClassC) |
| 2025-03-15 | 3.217.34.194 (ClassC) |
| 2025-04-23 | 98.85.100.53 (ClassC) |
| 2025-06-22 | 34.194.118.94 (ClassC) |
| 2025-07-03 | 3.212.229.241 (ClassC) |
| Date | Domain | IP |
| wse1.collab.api.hmhco.com | 2024-04-13 | 52.71.203.74 |
| cert.collab.api.hmhco.com | 2025-01-21 | 34.202.255.13 |
| e1.cert.collab.api.hmhco.com | 2025-01-09 | 52.204.46.73 |