iP or domain name lookup

smtp.hnu.edu.cn Server iP：

Current resolution：

domain resolution record：

2021-12-16-----2022-08-01 112.90.80.126

2021-12-16-----2022-08-01 157.148.36.163

2021-12-16-----2022-08-01 120.232.27.164

2021-12-16-----2022-08-01 119.147.3.196

2021-12-16-----2022-08-01 157.255.202.11

2021-12-16-----2022-08-01 14.22.9.228

2022-08-01-----2022-08-01 183.2.143.59

2022-08-01-----2022-08-01 112.53.42.125

2022-08-01-----2022-08-01 119.147.3.176

2022-08-01-----2022-08-01 175.27.18.147

2022-08-01-----2022-08-01 101.32.113.90

2021-12-16-----2021-12-16 120.232.22.49

2021-12-16-----2021-12-16 124.156.190.79

2021-12-16-----2021-12-16 119.147.6.199

2021-12-16-----2021-12-16 109.244.196.69