| Date | IP Address |
| 2019-12-24 | 104.112.202.173 (ClassC) |
| 2023-06-24 | 2.23.25.170 (ClassC) |
| 2024-09-26 | 23.195.237.25 (ClassC) |
| 2024-11-25 | 95.101.160.246 (ClassC) |
| 2025-05-05 | 23.195.237.30 (ClassC) |
| 2025-10-03 | 23.198.170.119 (ClassC) |
| 2025-11-24 | 104.90.248.54 (ClassC) |
| Date | Domain | IP |
| image.notifications.citibank.com.vn | 2023-08-25 | 23.195.237.25 |
| image.uat.notifications.citibank.com.vn | 2024-09-26 | 23.195.237.25 |