| Date | IP Address |
| 2022-07-25 | 23.11.30.58 (ClassC) |
| 2022-07-26 | 23.66.64.61 (ClassC) |
| 2022-08-23 | 23.64.247.180 (ClassC) |
| 2022-10-11 | 23.79.211.190 (ClassC) |
| 2023-04-05 | 23.194.158.22 (ClassC) |
| 2023-08-25 | 104.86.236.188 (ClassC) |
| 2023-11-27 | 104.118.252.134 (ClassC) |
| 2024-07-07 | 23.6.100.243 (ClassC) |
| 2024-07-17 | 184.25.189.43 (ClassC) |
| 2024-09-13 | 23.200.133.222 (ClassC) |
| 2024-09-13 | 23.200.133.249 (ClassC) |
| 2025-02-06 | 23.200.156.23 (ClassC) |
| 2025-02-06 | 23.200.156.6 (ClassC) |
| 2025-04-20 | 23.216.147.138 (ClassC) |
| 2025-04-29 | 23.44.175.113 (ClassC) |
| 2025-06-15 | 23.56.168.146 (ClassC) |
| 2025-06-15 | 23.56.168.192 (ClassC) |
| 2025-08-12 | 23.216.147.131 (ClassC) |
| 2025-08-20 | 23.41.4.88 (ClassC) |
| 2025-09-23 | 23.46.17.178 (ClassC) |
| 2025-09-26 | 23.46.17.186 (ClassC) |
| 2025-12-15 | 23.41.4.68 (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 |