| Date | IP Address |
| 2013-11-26 | 195.228.45.29 (ClassC) |
| 2016-03-23 | 80.249.170.174 (ClassC) |
| 2018-05-04 | 213.181.195.83 (ClassC) |
| 2018-05-04 | 213.181.195.82 (ClassC) |
| 2019-10-06 | 185.43.204.197 (ClassC) |
| 2019-10-06 | 185.43.204.196 (ClassC) |
| 2019-12-09 | 104.31.64.80 (ClassC) |
| 2019-12-09 | 104.31.65.80 (ClassC) |
| 2020-01-22 | 104.27.145.155 (ClassC) |
| 2020-01-22 | 104.27.144.155 (ClassC) |
| 2020-02-11 | 104.27.190.140 (ClassC) |
| 2020-02-11 | 104.27.191.140 (ClassC) |
| 2020-03-13 | 104.28.14.222 (ClassC) |
| 2020-03-13 | 104.28.15.222 (ClassC) |
| 2022-02-09 | 188.114.96.3 (ClassC) |
| 2023-12-24 | 172.67.166.7 (ClassC) |
| 2024-01-28 | 104.21.11.124 (ClassC) |
| 2024-12-01 | 104.26.0.238 (ClassC) |
| 2024-12-14 | 172.67.70.148 (ClassC) |
| 2024-12-27 | 104.26.1.238 (ClassC) |
| Date | Domain | IP |
| m.duol.hu | 2024-07-13 | 104.26.0.238 |
| adat.duol.hu | 2024-10-02 | 145.236.99.51 |
| www.duol.hu | 2024-09-24 | 104.26.0.238 |