| Date | IP Address |
| 2022-03-18 | 52.207.156.208 (ClassC) |
| 2022-03-18 | 34.194.195.201 (ClassC) |
| 2023-06-16 | 34.227.130.45 (ClassC) |
| 2023-06-16 | 52.73.154.77 (ClassC) |
| 2023-09-02 | 34.226.162.38 (ClassC) |
| 2023-09-02 | 34.226.240.214 (ClassC) |
| 2024-04-13 | 52.200.81.171 (ClassC) |
| 2024-05-02 | 34.232.156.40 (ClassC) |
| 2024-06-05 | 3.225.38.69 (ClassC) |
| 2024-07-07 | 3.223.80.139 (ClassC) |
| 2024-07-13 | 54.221.85.172 (ClassC) |
| 2024-09-02 | 3.223.159.113 (ClassC) |
| 2024-09-27 | 34.206.86.160 (ClassC) |
| 2024-11-25 | 54.166.227.255 (ClassC) |
| 2025-03-19 | 54.237.138.30 (ClassC) |
| 2025-04-24 | 34.202.215.201 (ClassC) |
| 2025-05-28 | 52.7.207.9 (ClassC) |
| 2025-07-15 | 18.206.34.108 (ClassC) |
| 2025-08-21 | 3.223.42.16 (ClassC) |
| 2025-08-26 | 44.217.83.206 (ClassC) |
| 2025-09-16 | 18.210.186.92 (ClassC) |
| 2025-11-20 | 54.84.191.104 (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 |