iP or domain name lookup

ftp.pku.edu.cn Server iP：

Current resolution：

domain resolution record：

2024-04-17-----2024-07-12 159.69.83.207

2024-01-28-----2024-05-16 65.21.240.245

2024-03-18-----2024-03-18 23.88.53.29

2023-12-07-----2023-12-07 162.55.172.212

2019-07-05-----2021-03-14 95.216.161.60

2021-02-10-----2021-03-14 159.69.186.9

2019-10-30-----2021-02-10 159.69.42.212

2020-11-26-----2020-11-26 69.172.201.208

2018-09-11-----2018-10-16 221.179.46.194

2018-09-09-----2018-09-09 221.179.46.190