iP or domain name lookup

mail.tsinghui.com Server iP：

Current resolution：

domain resolution record：

2021-09-30-----2024-02-01 103.129.255.237

2023-09-13-----2024-02-01 45.254.48.73

2023-09-13-----2024-02-01 183.136.182.9

2023-09-13-----2024-02-01 117.147.199.41

2024-02-01-----2024-02-01 220.197.30.137

2024-02-01-----2024-02-01 111.124.200.41

2024-02-01-----2024-02-01 117.135.207.41

2021-09-29-----2023-11-07 103.129.255.238

2023-08-15-----2023-10-13 52.223.58.187

2023-09-13-----2023-10-13 35.71.138.126

2023-03-04-----2023-08-08 112.13.121.42

2023-03-04-----2023-08-08 101.71.155.44

2023-03-04-----2023-08-08 115.236.119.70

2022-04-29-----2023-06-30 117.147.199.33

2022-04-29-----2023-06-30 45.254.48.65

2022-04-29-----2023-06-30 183.136.182.1

2022-02-12-----2022-03-31 223.252.202.2

2019-06-30-----2021-09-30 123.58.177.239

2019-03-24-----2019-03-24 180.97.158.239

2019-03-24-----2019-03-24 117.23.61.103