iP or domain name lookup

pop.sina.com Server iP：

Current resolution：

domain resolution record：

2020-05-15-----2024-07-24 123.126.45.126

2023-10-07-----2024-07-24 49.7.36.85

2019-04-09-----2022-03-10 121.14.32.133

2019-04-09-----2022-03-10 39.156.6.106

2020-05-15-----2022-03-10 183.60.95.230

2017-08-26-----2018-01-17 60.28.113.62

2017-08-26-----2018-01-17 113.108.216.75

2016-10-25-----2017-09-04 202.108.3.242

2016-10-25-----2016-11-30 60.28.2.219

2016-10-25-----2016-11-30 218.30.115.107