| Date | IP Address |
| 2023-08-26 | 34.193.206.152 (ClassC) |
| 2023-11-29 | 34.225.217.32 (ClassC) |
| 2024-04-21 | 52.206.82.174 (ClassC) |
| 2024-05-06 | 3.227.128.213 (ClassC) |
| 2024-06-02 | 52.6.36.142 (ClassC) |
| 2024-06-20 | 54.87.66.93 (ClassC) |
| 2024-07-10 | 44.217.192.6 (ClassC) |
| 2024-07-18 | 54.164.210.88 (ClassC) |
| 2024-07-28 | 52.2.223.255 (ClassC) |
| 2024-07-31 | 44.207.95.77 (ClassC) |
| 2024-08-11 | 18.232.28.227 (ClassC) |
| 2024-08-19 | 23.22.43.98 (ClassC) |
| 2024-08-29 | 44.207.43.42 (ClassC) |
| 2024-09-18 | 34.230.230.224 (ClassC) |
| 2024-09-29 | 52.20.169.125 (ClassC) |
| 2024-10-19 | 3.222.166.40 (ClassC) |
| 2024-10-30 | 23.22.190.19 (ClassC) |
| 2024-11-15 | 3.213.25.83 (ClassC) |
| 2024-11-20 | 34.203.68.255 (ClassC) |
| 2024-11-24 | 18.210.132.154 (ClassC) |
| 2024-12-12 | 23.22.229.112 (ClassC) |
| 2024-12-20 | 18.214.75.254 (ClassC) |
| 2024-12-23 | 44.208.122.66 (ClassC) |
| 2024-12-28 | 44.198.71.173 (ClassC) |
| Date | Domain | IP |
| ep.hmhpub.com | 2024-12-14 | 209.235.124.31 |
| cert.ep.hmhpub.com | 2024-11-15 | 45.60.11.203 |
| mxplanners.hmhpub.com | 2024-11-24 | 18.210.132.154 |
| www.hmhpub.com | 2024-11-24 | 3.231.72.27 |