iP or domain name lookup

lionmail.columbia.edu Server iP：

Current resolution：

domain resolution record：

2024-03-16-----2024-03-16 142.250.207.19

2024-03-16-----2024-03-16 142.250.186.147

2024-03-16-----2024-03-16 74.125.68.121

2024-03-16-----2024-03-16 172.217.14.83

2022-03-12-----2023-05-01 142.251.43.19

2022-03-12-----2023-04-30 172.217.160.115

2022-03-12-----2023-04-30 172.217.160.83

2022-03-12-----2023-04-30 172.217.163.51

2022-03-12-----2023-04-30 142.251.42.243

2023-04-01-----2023-04-30 172.217.24.243

2023-04-24-----2023-04-24 142.251.220.83

2023-04-15-----2023-04-17 142.250.204.51

2023-04-17-----2023-04-17 142.251.220.115

2022-05-04-----2023-04-16 172.217.31.19

2022-06-02-----2023-04-07 142.250.204.83

2023-04-07-----2023-04-07 216.58.203.83

2023-04-01-----2023-04-01 142.251.220.19

2023-04-01-----2023-04-01 142.250.204.115

2023-02-16-----2023-02-16 142.251.220.51

2022-07-11-----2022-07-12 142.250.204.147

2022-07-12-----2022-07-12 142.250.199.83

2022-07-12-----2022-07-12 142.250.66.51

2022-05-04-----2022-05-05 108.177.97.121

2022-05-04-----2022-05-05 142.250.207.115

2022-05-04-----2022-05-05 142.250.157.121

2022-05-04-----2022-05-05 142.250.206.243

2022-05-04-----2022-05-05 142.250.76.147

2022-05-05-----2022-05-05 142.250.206.211

2022-05-05-----2022-05-05 74.125.204.121

2022-05-05-----2022-05-05 64.233.189.121

2022-05-04-----2022-05-04 172.217.25.179

2022-05-04-----2022-05-04 142.251.8.121

2022-05-04-----2022-05-04 64.233.188.121

2022-03-12-----2022-03-12 172.217.24.115