| Date | IP Address |
| 2019-07-21 | 52.6.9.29 (ClassC) |
| 2020-10-17 | 52.207.22.40 (ClassC) |
| 2020-12-16 | 18.214.179.189 (ClassC) |
| 2021-12-12 | 67.202.25.0 (ClassC) |
| 2022-04-12 | 52.44.248.89 (ClassC) |
| 2022-04-12 | 54.92.178.194 (ClassC) |
| 2025-10-16 | 34.194.81.15 (ClassC) |
| 2025-12-20 | 100.25.145.89 (ClassC) |
| 2026-01-18 | 54.197.125.254 (ClassC) |
| Date | Domain | IP |
| image.engage.frontiersin.net | 2024-09-09 | 184.28.50.137 |
| click.engage.frontiersin.net | 2025-04-09 | 23.32.75.138 |
| docs.frontiersin.net | 2025-10-16 | 34.194.81.15 |