iP or domain name lookup

ftp.ruby-lang.org Server iP：

Current resolution：

domain resolution record：

2019-07-03-----2024-06-19 151.101.77.178

2019-07-03-----2024-06-19 151.101.109.178

2022-10-26-----2024-06-19 146.75.113.178

2024-02-27-----2024-06-19 151.101.89.178

2020-06-12-----2024-02-27 151.101.1.178

2019-07-03-----2020-06-12 151.101.229.178

2019-07-03-----2020-02-16 151.101.41.178

2019-07-03-----2019-07-15 151.101.25.178

2019-07-03-----2019-07-03 151.101.129.178

2019-07-03-----2019-07-03 151.101.193.178

2016-12-02-----2017-05-16 221.186.184.75