iP or domain name lookup

kreader.cnki.net Server iP：

Current resolution：

domain resolution record：

2023-04-23-----2023-12-10 115.31.65.33

2022-03-11-----2023-07-01 121.194.4.232

2019-04-13-----2023-04-23 115.31.65.9

2021-06-24-----2021-07-26 103.52.172.87

2021-04-09-----2021-05-15 103.26.1.104

2017-05-12-----2018-12-29 119.167.209.28

2018-12-29-----2018-12-29 103.26.1.107

2017-08-06-----2018-04-20 103.227.81.49

2017-05-12-----2017-05-12 103.227.81.52