| Date | IP Address |
| 2012-12-22 | 198.45.22.173 (ClassC) |
| 2021-08-15 | 79.125.34.126 (ClassC) |
| 2021-09-11 | 52.211.154.123 (ClassC) |
| 2021-11-22 | 52.213.222.4 (ClassC) |
| 2022-04-21 | 34.240.90.156 (ClassC) |
| 2023-05-02 | 52.215.50.2 (ClassC) |
| 2023-07-05 | 54.229.228.42 (ClassC) |
| 2023-08-14 | 54.154.26.251 (ClassC) |
| 2023-08-26 | 52.208.168.149 (ClassC) |
| 2024-07-01 | 204.74.99.100 (ClassC) |
| 2024-08-02 | 54.171.209.23 (ClassC) |
| 2024-08-09 | 54.228.145.54 (ClassC) |
| 2024-08-12 | 63.34.100.35 (ClassC) |
| 2024-08-12 | 54.73.157.221 (ClassC) |
| 2024-08-13 | 34.248.117.172 (ClassC) |
| 2024-09-14 | 52.210.227.49 (ClassC) |
| 2024-10-04 | 54.75.90.165 (ClassC) |
| 2024-10-04 | 54.171.79.102 (ClassC) |
| 2024-12-09 | 34.250.45.216 (ClassC) |
| 2025-01-12 | 52.210.160.201 (ClassC) |
| 2025-01-28 | 63.35.173.41 (ClassC) |
| 2025-02-18 | 52.49.160.244 (ClassC) |
| 2025-02-26 | 52.31.147.79 (ClassC) |
| 2025-04-23 | 52.30.51.192 (ClassC) |
| 2025-05-05 | 63.33.10.88 (ClassC) |
| 2025-05-17 | 52.211.53.254 (ClassC) |
| 2026-02-03 | 52.84.20.42 (ClassC) |
| 2026-02-10 | 52.222.205.65 (ClassC) |
| Date | Domain | IP |
| access.prod.mhprofessional.com | 2026-01-03 | 3.215.4.97 |
| staging.access.nonprod.mhprofessional.com | 2026-01-18 | 52.0.12.163 |
| www.mhprofessional.com | 2024-11-29 | 104.18.42.66 |