iP or domain name lookup

hn.ggschool.cn Server iP：

Current resolution：

domain resolution record：

2019-07-12-----2019-07-12 172.255.244.185

2017-11-30-----2017-12-08 220.181.105.240

2017-11-30-----2017-12-08 111.161.3.162

2017-12-08-----2017-12-08 202.97.231.81

2017-12-08-----2017-12-08 218.107.196.208

2017-12-08-----2017-12-08 120.192.250.86

2017-12-08-----2017-12-08 59.46.4.212

2017-12-08-----2017-12-08 171.111.154.211

2017-11-30-----2017-11-30 120.209.137.220

2017-11-30-----2017-11-30 120.192.250.92

2017-11-30-----2017-11-30 27.221.30.45

2017-11-30-----2017-11-30 119.167.151.239

2017-11-30-----2017-11-30 122.227.164.191

2017-11-30-----2017-11-30 171.111.154.208

2017-10-08-----2017-10-31 106.14.66.163

2017-10-08-----2017-10-08 59.46.4.216