| Date | IP Address |
| 2020-08-09 | 52.43.121.223 (ClassC) |
| 2023-11-13 | 52.40.128.104 (ClassC) |
| 2024-06-01 | 34.208.169.228 (ClassC) |
| 2024-07-14 | 54.69.104.236 (ClassC) |
| 2024-07-14 | 35.164.184.119 (ClassC) |
| 2024-08-17 | 52.24.113.56 (ClassC) |
| 2024-09-30 | 52.24.185.59 (ClassC) |
| 2024-11-15 | 54.149.35.42 (ClassC) |
| 2024-11-25 | 52.25.223.4 (ClassC) |
| 2025-02-17 | 52.89.109.245 (ClassC) |
| 2025-03-21 | 52.26.30.217 (ClassC) |
| 2025-04-23 | 35.161.78.158 (ClassC) |
| 2026-01-24 | 54.186.65.147 (ClassC) |
| 2026-01-28 | 52.37.75.29 (ClassC) |
| 2026-02-16 | 100.23.18.175 (ClassC) |
| Date | Domain | IP |
| portal.avatax.com | 2024-10-02 | 35.170.210.211 |
| rest.avatax.com | 2025-10-13 | 35.81.50.204 |
| sandbox-rest.avatax.com | 2025-10-23 | 54.189.217.102 |
| www.avatax.com | 2023-11-13 | 52.40.128.104 |