iP or domain name lookup

i.renren.com Server iP：

Current resolution：

domain resolution record：

2017-09-03-----2019-11-22 120.133.2.241

2018-01-18-----2019-11-22 120.133.2.243

2019-07-10-----2019-11-22 120.133.2.210

2017-09-03-----2019-10-16 120.133.2.242

2017-09-03-----2018-01-18 103.235.252.17

2017-09-03-----2018-01-18 103.235.252.231

2017-12-12-----2018-01-18 103.235.252.233

2017-12-12-----2018-01-18 103.235.252.212

2017-09-03-----2017-09-03 103.235.252.232

2017-09-03-----2017-09-03 103.235.252.211