| Date | IP Address |
| 2024-10-27 | 34.194.139.191 (ClassC) |
| 2025-09-17 | 18.215.140.76 (ClassC) |
| 2025-10-19 | 52.73.138.36 (ClassC) |
| 2025-11-19 | 54.82.157.42 (ClassC) |
| Date | Domain | IP |
| v2.ellie.sharpen.prod.mheducation.com | 2025-09-08 | 3.33.204.205 |
| fred.api.sharpen.prod.mheducation.com | 2025-09-17 | 18.215.140.76 |
| libraengine.api.sharpen.prod.mheducation.com | 2025-10-21 | 98.85.174.66 |
| explore.api.sharpen.prod.mheducation.com | 2025-01-14 | 44.194.94.130 |
| user.api.sharpen.prod.mheducation.com | 2024-12-26 | 44.197.5.53 |
| payments.api.sharpen.prod.mheducation.com | 2024-12-26 | 3.233.193.73 |
| content.api.sharpen.prod.mheducation.com | 2025-01-14 | 3.83.186.143 |
| gateway.api.sharpen.prod.mheducation.com | 2025-09-19 | 76.223.21.218 |