iP or domain name lookup

1.wctest.sinaapp.com Server iP：

Current resolution：

domain resolution record：

2019-07-17-----2021-03-29 220.181.136.150

2019-07-17-----2021-03-29 220.181.136.170

2020-05-03-----2021-03-29 220.181.136.132

2020-05-03-----2020-05-03 220.181.136.130

2017-04-15-----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

2017-04-09-----2017-04-19 220.181.136.27

2017-04-09-----2017-04-19 202.108.35.224

2017-04-19-----2017-04-19 220.181.136.41

2017-04-15-----2017-04-15 202.108.35.226

2017-04-09-----2017-04-09 202.108.35.225

2017-04-09-----2017-04-09 220.181.136.43