iP or domain name lookup

ausopen.com Server iP：

Current resolution：

domain resolution record：

2021-09-26-----2021-09-27 104.19.158.73

2021-09-26-----2021-09-26 104.19.159.73

2019-06-14-----2020-01-30 104.17.178.107

2019-06-14-----2020-01-30 104.17.177.107

2017-11-27-----2018-04-18 104.24.1.26

2017-11-27-----2018-04-18 104.24.0.26

2017-03-29-----2017-04-02 104.20.212.25

2017-03-30-----2017-04-02 104.20.213.25

2017-03-29-----2017-03-29 104.20.33.31

2017-03-29-----2017-03-29 104.20.34.31

2017-03-29-----2017-03-29 52.65.151.175