iP or domain name lookup

dt2.duowan.com Server iP：

Current resolution：

domain resolution record：

2017-09-03-----2019-11-01 221.228.83.161

2017-12-12-----2019-11-01 14.17.106.45

2018-01-17-----2019-11-01 14.17.106.80

2017-09-03-----2019-10-09 120.195.214.154

2017-12-12-----2019-10-09 221.228.106.121

2017-12-12-----2019-10-09 118.191.7.60

2017-12-12-----2019-10-09 112.25.95.249

2017-09-03-----2019-08-26 118.191.8.154

2017-09-03-----2017-09-05 183.36.121.135

2017-09-03-----2017-09-05 58.251.123.7

2017-09-03-----2017-09-03 183.61.2.173