iP or domain name lookup

mail.just.edu.cn Server iP：

Current resolution：

domain resolution record：

2021-07-09-----2023-10-07 112.90.80.23

2021-07-09-----2023-10-07 129.226.106.19

2021-07-09-----2023-10-07 14.17.5.207

2021-07-09-----2023-02-17 81.71.56.226

2021-07-09-----2021-07-09 112.53.42.14

2019-06-30-----2021-01-01 163.177.89.176

2019-06-30-----2021-01-01 113.96.233.160

2019-06-30-----2021-01-01 183.232.94.57

2021-01-01-----2021-01-01 121.51.176.76

2019-06-30-----2020-01-14 182.254.38.92