iP or domain name lookup

xuerentang.sinaapp.com Server iP：

Current resolution：

domain resolution record：

2021-12-13-----2021-12-13 220.181.129.60

2021-03-01-----2021-03-01 220.181.136.150

2021-03-01-----2021-03-01 220.181.136.170

2021-03-01-----2021-03-01 220.181.136.132

2019-04-17-----2020-07-03 220.181.136.234

2017-06-12-----2018-01-17 202.108.35.250

2017-08-28-----2018-01-17 202.108.35.235

2017-08-26-----2017-08-28 202.108.35.237

2017-08-26-----2017-08-28 202.108.35.194

2017-06-12-----2017-06-16 220.181.136.30

2017-06-12-----2017-06-16 220.181.136.41

2017-06-16-----2017-06-16 202.108.35.225