| Date | IP Address |
| 2021-03-21 | 54.239.174.94 (ClassC) |
| 2021-03-21 | 54.239.174.32 (ClassC) |
| 2021-03-21 | 54.239.174.33 (ClassC) |
| 2024-10-21 | 99.84.66.120 (ClassC) |
| 2025-06-28 | 99.84.66.4 (ClassC) |
| 2025-09-06 | 3.175.34.94 (ClassC) |
| 2026-01-15 | 3.175.34.93 (ClassC) |
| Date | Domain | IP |
| tax-filing.optimatax.com | 2025-11-22 | 35.155.204.0 |
| serverless.api.optimatax.com | 2024-07-08 | 99.84.66.116 |
| portal.optimatax.com | 2025-05-26 | 52.35.170.99 |
| protection.optimatax.com | 2025-08-02 | 204.246.191.17 |
| css.optimatax.com | 2024-10-21 | 99.84.66.120 |
| www.optimatax.com | 2024-04-13 | 44.233.8.185 |