iP or domain name lookup

bangbang.synology.me Server iP：

Current resolution：

domain resolution record：

2017-12-14-----2018-01-03 116.233.110.115

2017-07-19-----2017-07-20 116.233.27.146

2017-04-29-----2017-04-29 116.232.154.140

2017-04-26-----2017-04-26 116.232.155.201

2017-02-12-----2017-02-12 116.233.25.162

2017-01-25-----2017-01-25 116.233.31.219

2016-12-05-----2016-12-06 101.86.233.90

2016-11-08-----2016-11-08 101.86.235.27