iP or domain name lookup

yyyz.dongip.com Server iP：

Current resolution：

domain resolution record：

2019-10-05-----2019-10-05 223.145.229.251

2017-02-23-----2017-02-23 223.145.231.125

2017-02-05-----2017-02-05 223.145.228.130

2017-02-04-----2017-02-04 223.145.229.215

2016-12-21-----2017-01-08 223.145.228.4

2016-11-10-----2016-11-11 223.145.103.56