iP or domain name lookup

n.archive.ubuntu.com Server iP：

Current resolution：

domain resolution record：

2017-07-05-----2020-12-22 91.189.88.152

2020-07-05-----2020-12-22 91.189.88.142

2020-12-22-----2020-12-22 91.189.91.38

2020-12-22-----2020-12-22 91.189.91.39

2017-07-05-----2019-11-27 91.189.88.149

2019-07-12-----2019-11-27 91.189.88.24

2019-07-12-----2019-11-27 91.189.88.31

2017-07-05-----2019-08-08 91.189.88.162

2019-07-12-----2019-07-12 91.189.91.23

2017-07-05-----2017-07-05 91.189.88.161