| Date | IP Address |
| 2013-11-07 | 204.2.222.106 (ClassC) |
| 2014-02-17 | 207.152.124.24 (ClassC) |
| 2014-02-20 | 96.6.46.50 (ClassC) |
| 2016-04-25 | 23.193.173.172 (ClassC) |
| 2018-03-01 | 104.107.104.184 (ClassC) |
| 2018-06-03 | 104.113.57.135 (ClassC) |
| 2018-09-05 | 23.61.181.78 (ClassC) |
| 2019-01-04 | 23.207.57.194 (ClassC) |
| 2019-05-16 | 23.4.117.235 (ClassC) |
| 2019-08-02 | 104.65.32.129 (ClassC) |
| 2021-06-14 | 104.78.246.142 (ClassC) |
| 2023-04-11 | 23.7.75.160 (ClassC) |
| 2023-08-25 | 104.86.232.121 (ClassC) |
| 2023-09-15 | 23.194.145.188 (ClassC) |
| 2024-01-08 | 23.37.223.178 (ClassC) |
| 2024-03-02 | 184.24.207.160 (ClassC) |
| 2024-03-10 | 104.112.183.217 (ClassC) |
| 2024-04-26 | 104.71.218.112 (ClassC) |
| 2024-05-31 | 23.41.4.68 (ClassC) |
| 2024-08-29 | 23.192.230.86 (ClassC) |
| 2024-10-09 | 23.212.248.19 (ClassC) |
| 2024-10-21 | 23.1.105.204 (ClassC) |
| 2024-11-15 | 23.222.241.23 (ClassC) |
| 2024-11-15 | 23.222.241.7 (ClassC) |
| 2024-11-16 | 23.64.119.26 (ClassC) |
| 2024-12-08 | 23.41.4.69 (ClassC) |
| 2025-02-08 | 23.54.19.83 (ClassC) |
| 2025-02-27 | 23.41.4.74 (ClassC) |
| 2026-01-06 | 23.48.4.218 (ClassC) |
| 2026-02-26 | 23.41.4.78 (ClassC) |
| 2026-03-07 | 23.41.4.75 (ClassC) |
| Date | Domain | IP |
| www.irs.ustreas.gov | 2014-10-15 | 90.84.60.48 |
| www.ustreas.gov | 2023-08-25 | 104.86.232.121 |