| Date | IP Address |
| 2023-08-26 | 104.86.236.188 (ClassC) |
| 2024-03-15 | 184.25.189.43 (ClassC) |
| 2024-03-26 | 23.195.229.53 (ClassC) |
| 2024-06-28 | 23.6.100.243 (ClassC) |
| 2024-07-26 | 72.246.162.32 (ClassC) |
| 2024-10-28 | 23.41.4.90 (ClassC) |
| 2025-02-09 | 23.38.191.178 (ClassC) |
| 2025-04-10 | 23.216.147.138 (ClassC) |
| 2025-05-23 | 23.44.175.113 (ClassC) |
| 2025-07-11 | 23.41.4.68 (ClassC) |
| 2025-08-12 | 23.41.4.88 (ClassC) |
| 2025-09-18 | 23.46.17.178 (ClassC) |
| 2025-09-23 | 23.46.17.186 (ClassC) |
| Date | Domain | IP |
| apps2.irs.gov | 2014-05-11 | 198.47.108.64 |
| la1.www4.irs.gov | 2023-08-25 | 104.86.253.111 |
| sa1.www4.irs.gov | 2023-08-25 | 104.86.253.151 |
| la2.www4.irs.gov | 2023-08-25 | 104.86.253.111 |
| sa2.www4.irs.gov | 2023-08-25 | 104.86.253.151 |
| la3.www4.irs.gov | 2023-08-25 | 104.86.245.147 |
| sa3.www4.irs.gov | 2023-08-25 | 104.86.245.147 |
| la4.www4.irs.gov | 2023-08-25 | 104.86.245.147 |
| sa4.www4.irs.gov | 2023-08-25 | 104.86.245.147 |
| la.www4.irs.gov | 2023-08-25 | 104.86.253.111 |