iP or domain name lookup

track.cnki.net Server iP：

Current resolution：

domain resolution record：

2022-03-07-----2022-03-09 121.194.4.228

2020-12-01-----2022-01-07 121.194.4.7

2019-04-23-----2019-11-22 103.227.81.123

2017-12-13-----2018-04-26 103.227.81.59

2017-08-06-----2017-09-05 103.227.81.60