iP or domain name lookup

u51.com Server iP：

Current resolution：

domain resolution record：

2018-10-12-----2025-01-20 115.238.29.11

2023-11-05-----2023-11-05 114.55.16.141

2018-10-12-----2020-01-25 101.71.54.151

2018-10-12-----2020-01-25 117.148.143.71

2016-12-13-----2017-12-06 121.52.235.6

2016-12-13-----2017-12-06 120.199.7.184

2016-12-13-----2017-12-06 183.129.178.142