iP or domain name lookup

doc.is3.cn Server iP：

Current resolution：

domain resolution record：

2021-05-25-----2021-07-07 163.181.33.180

2021-05-25-----2021-07-07 117.25.156.172

2021-05-25-----2021-07-07 58.218.215.92

2021-05-25-----2021-07-07 36.102.212.83

2021-05-25-----2021-07-07 123.129.244.201

2021-05-25-----2021-07-07 119.84.129.105

2021-07-07-----2021-07-07 221.181.200.217

2021-07-07-----2021-07-07 120.192.82.192

2021-05-25-----2021-05-25 36.156.81.236

2021-05-25-----2021-05-25 58.216.15.225

2021-05-25-----2021-05-25 125.37.206.223