iP or domain name lookup

ri521.com Server iP：

Current resolution：

domain resolution record：

2021-05-02-----2021-07-21 23.27.177.108

2020-11-22-----2020-11-22 69.172.201.208

2019-07-15-----2019-07-15 208.91.197.46

2017-12-24-----2017-12-25 146.71.46.56

2017-10-26-----2017-12-04 192.186.52.22

2017-08-05-----2017-08-05 104.216.95.225