iP or domain name lookup

i.lanzou.com Server iP：

Current resolution：

domain resolution record：

2018-12-23-----2024-04-20 47.91.203.57

2017-11-16-----2017-11-19 150.138.216.175

2017-11-16-----2017-11-19 61.54.1.130

2017-11-16-----2017-11-19 146.196.78.34

2017-11-16-----2017-11-19 120.221.19.218

2017-11-16-----2017-11-19 118.123.118.155

2017-11-16-----2017-11-19 123.132.254.145

2017-11-16-----2017-11-19 112.67.250.14

2017-11-19-----2017-11-19 171.11.231.2

2017-11-19-----2017-11-19 183.158.35.41

2017-11-16-----2017-11-16 183.158.35.59