| Date | IP Address |
| 2024-04-13 | 35.172.127.160 (ClassC) |
| 2024-07-17 | 34.201.84.216 (ClassC) |
| 2024-08-12 | 44.216.230.72 (ClassC) |
| 2024-10-05 | 44.222.10.32 (ClassC) |
| 2024-11-25 | 34.194.254.248 (ClassC) |
| 2025-01-21 | 18.211.199.69 (ClassC) |
| 2025-03-25 | 3.233.164.36 (ClassC) |
| 2025-05-01 | 34.225.46.108 (ClassC) |
| 2025-05-11 | 98.85.53.49 (ClassC) |
| 2025-05-26 | 54.204.187.8 (ClassC) |
| 2025-08-21 | 3.223.42.16 (ClassC) |
| 2025-08-24 | 44.217.83.206 (ClassC) |
| 2025-09-14 | 3.213.22.176 (ClassC) |
| 2025-09-24 | 18.210.186.92 (ClassC) |
| 2025-11-19 | 3.223.53.97 (ClassC) |
| Date | Domain | IP |
| pass-thru-tester-lab.fasttax.com | 2024-04-13 | 52.200.81.171 |
| gosystemrslab.fasttax.com | 2024-04-13 | 35.172.127.160 |
| insourceexpresslab.fasttax.com | 2024-04-13 | 52.200.81.171 |
| rs-gosyswsvc.fasttax.com | 2024-04-13 | 52.200.81.171 |
| gosystemrspd.fasttax.com | 2025-08-24 | 34.233.254.161 |
| maintenance.fasttax.com | 2025-09-18 | 155.46.172.126 |
| gosystemrslab-ciam.fasttax.com | 2024-04-13 | 35.172.127.160 |
| gosystemrs.fasttax.com | 2025-03-27 | 3.224.246.59 |
| gosystemrssat.fasttax.com | 2025-05-14 | 34.233.254.161 |
| sat-gosystempt.fasttax.com | 2024-04-13 | 34.203.130.96 |
| gosystemrstbb-devcicdtest.fasttax.com | 2024-04-13 | 35.172.127.160 |
| gosystemrsdevcicdtest.fasttax.com | 2024-04-13 | 35.172.127.160 |
| gosystemrsdev.fasttax.com | 2024-04-13 | 3.88.246.220 |
| www.fasttax.com | 2025-09-16 | 155.46.172.254 |