iP or domain name lookup

yz.1991pay.com Server iP：

Current resolution：

domain resolution record：

2019-12-12-----2019-12-12 103.45.70.27

2016-08-26-----2016-08-30 23.27.192.116

2016-08-26-----2016-08-30 111.175.221.58

2016-08-30-----2016-08-30 221.192.153.41

2016-08-26-----2016-08-26 221.204.244.36

2016-05-31-----2016-05-31 137.175.60.34

2016-02-07-----2016-02-24 43.243.123.83

2016-02-06-----2016-02-06 210.209.80.48

2016-02-06-----2016-02-06 210.209.80.248