| Date | IP Address |
| 2023-10-26 | 34.149.155.70 (ClassC) |
| 2025-11-15 | 34.107.204.85 (ClassC) |
| Date | Domain | IP |
| multi-tenant-app-service.emaildefense.proofpoint.com | 2025-04-15 | 44.194.164.96 |
| bifrost-staging.emaildefense.proofpoint.com | 2025-04-14 | 100.25.108.121 |
| auth.emaildefense.proofpoint.com | 2025-03-02 | 44.207.77.253 |
| api.emaildefense.proofpoint.com | 2024-08-28 | 3.163.24.62 |
| bifrost-api.emaildefense.proofpoint.com | 2025-04-15 | 44.196.67.39 |
| framework.emaildefense.proofpoint.com | 2024-06-09 | 34.213.170.117 |
| metis-shell.emaildefense.proofpoint.com | 2025-08-25 | 3.210.255.36 |
| admin.emaildefense.proofpoint.com | 2024-07-06 | 3.163.24.15 |
| data.pendo.emaildefense.proofpoint.com | 2025-11-15 | 34.107.204.85 |
| content.pendo.emaildefense.proofpoint.com | 2024-07-11 | 99.84.66.35 |
| app.emaildefense.proofpoint.com | 2024-10-11 | 3.163.165.118 |
| feature-flags.emaildefense.proofpoint.com | 2025-10-17 | 34.206.154.105 |
| bifrost.emaildefense.proofpoint.com | 2024-12-06 | 3.222.22.66 |