| Date | IP Address |
| 2014-11-20 | 104.28.30.23 (ClassC) |
| 2019-11-08 | 104.28.31.23 (ClassC) |
| 2019-11-24 | 34.236.117.101 (ClassC) |
| 2020-05-27 | 172.67.129.115 (ClassC) |
| 2021-03-11 | 104.21.1.153 (ClassC) |
| 2021-09-09 | 104.21.82.4 (ClassC) |
| 2021-09-09 | 172.67.167.87 (ClassC) |
| 2022-09-30 | 104.26.6.212 (ClassC) |
| 2022-09-30 | 104.26.7.212 (ClassC) |
| 2022-09-30 | 172.67.73.157 (ClassC) |
| 2024-07-28 | 172.66.43.127 (ClassC) |
| 2024-09-16 | 172.66.40.129 (ClassC) |
| 2025-01-09 | 104.26.13.170 (ClassC) |
| 2025-05-14 | 172.67.71.155 (ClassC) |
| 2026-01-29 | 104.26.12.170 (ClassC) |
| Date | Domain | IP |
| tracking.yclas.com | 2025-04-29 | 54.38.226.140 |
| cdn.yclas.com | 2014-11-20 | 104.28.30.23 |
| demo.yclas.com | 2024-01-07 | 172.66.43.127 |
| content.yclas.com | 2015-02-24 | 104.28.30.23 |
| www.yclas.com | 2014-12-03 | 104.28.30.23 |