iP or domain name lookup

51999.com Server iP：

Current resolution：

domain resolution record：

2023-10-28-----2024-05-26 15.197.142.173

2023-10-28-----2024-05-26 3.33.152.147

2024-01-11-----2024-01-11 156.251.239.29

2021-10-17-----2023-10-06 127.0.0.1

2023-05-29-----2023-06-10 34.98.99.30

2020-07-02-----2022-11-01 46.166.184.113

2021-12-09-----2022-11-01 185.206.180.148

2018-05-08-----2021-10-08 185.206.180.119

2017-10-15-----2019-10-22 46.166.184.106

2017-10-15-----2018-01-11 149.56.126.232

2017-05-07-----2017-05-07 23.245.203.142

2016-12-08-----2017-03-08 103.70.227.204