| Date | IP Address |
| 2021-05-11 | 65.8.227.119 (ClassC) |
| 2021-05-11 | 65.8.227.2 (ClassC) |
| 2021-05-11 | 65.8.227.41 (ClassC) |
| 2021-05-11 | 65.8.227.61 (ClassC) |
| 2024-07-08 | 99.84.66.116 (ClassC) |
| 2024-08-31 | 99.84.66.83 (ClassC) |
| 2024-12-10 | 3.163.165.101 (ClassC) |
| 2025-09-04 | 99.84.66.56 (ClassC) |
| 2026-01-26 | 3.169.173.128 (ClassC) |
| 2026-02-19 | 3.169.173.16 (ClassC) |
| 2026-03-02 | 3.169.173.84 (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 |