| Date | IP Address |
| 2021-11-04 | 47.246.43.181 (ClassC) |
| 2025-10-03 | 60.9.5.126 (ClassC) |
| Date | Domain | IP |
| api.hello.ef.cn | 2025-03-24 | 183.131.87.124 |
| admin.hello.ef.cn | 2024-10-08 | 8.25.82.190 |
| assets.hello.ef.cn | 2023-11-29 | 124.239.240.173 |
| assets-aws.hello.ef.cn | 2024-12-27 | 116.177.236.45 |
| get.hello.ef.cn | 2025-05-07 | 117.168.151.102 |
| teacher-dev.hello.ef.cn | 2025-10-03 | 60.9.5.126 |
| api-proxy.hello.ef.cn | 2024-12-27 | 218.207.1.77 |