iP or domain name lookup

kailian.synology.me Server iP：

Current resolution：

domain resolution record：

2021-10-10-----2021-10-11 223.73.150.133

2021-08-05-----2021-08-05 120.239.174.171

2021-07-29-----2021-07-29 120.239.174.251

2021-07-27-----2021-07-27 120.239.174.225

2021-06-23-----2021-06-23 120.239.174.79

2021-05-18-----2021-05-18 223.73.150.246

2021-04-01-----2021-04-01 120.239.174.137

2020-09-13-----2020-09-13 223.73.150.166