iP or domain name lookup

smtp.ym.163.com Server iP：

Current resolution：

domain resolution record：

2022-02-18-----2022-11-02 101.71.155.42

2022-02-21-----2022-11-02 115.236.119.66

2020-11-18-----2022-02-07 101.71.155.101

2020-11-18-----2022-02-07 115.236.118.101

2019-02-27-----2020-11-18 59.111.176.14

2019-02-27-----2020-11-18 59.111.176.15

2016-11-21-----2018-06-09 123.58.177.199

2016-11-21-----2018-06-09 223.252.213.139

2016-11-21-----2018-06-09 223.252.213.138

2018-04-16-----2018-06-09 59.111.176.117

2018-04-16-----2018-06-09 59.111.176.116