iP or domain name lookup

pop3.citicpub.com Server iP：

Current resolution：

domain resolution record：

2021-05-20-----2021-10-15 42.120.149.9

2021-05-20-----2021-10-15 140.205.77.6

2021-05-20-----2021-10-15 140.205.23.200

2021-05-20-----2021-10-15 140.205.2.35

2021-05-20-----2021-10-15 140.205.80.35

2021-05-20-----2021-10-15 42.120.214.14

2021-05-20-----2021-10-15 140.205.23.201

2021-05-20-----2021-10-15 47.89.74.67

2021-05-20-----2021-10-15 42.120.214.13

2021-05-20-----2021-10-15 140.205.28.137

2021-05-20-----2021-10-15 140.205.77.37