iP or domain name lookup

ihb.ac.cn Server iP：

Current resolution：

domain resolution record：

2019-12-03-----2019-12-22 159.69.83.207

2019-12-19-----2019-12-19 95.216.161.60

2019-11-10-----2019-11-10 159.69.42.212

2017-01-03-----2019-07-16 159.226.163.131

2017-01-03-----2019-07-15 159.226.163.130