iP or domain name lookup

c.nvtu.ren Server iP：

Current resolution：

domain resolution record：

2021-03-07-----2021-04-05 101.72.212.221

2021-03-07-----2021-04-05 101.72.212.223

2021-03-07-----2021-04-05 101.72.212.224

2021-03-07-----2021-04-05 101.72.212.226

2021-03-07-----2021-04-05 101.72.212.222

2021-03-07-----2021-04-05 101.72.212.225

2021-03-25-----2021-04-05 101.72.212.227

2021-03-25-----2021-04-05 101.72.212.228

2021-01-16-----2021-02-28 27.221.44.43

2021-01-16-----2021-02-28 58.215.145.187

2021-01-16-----2021-02-28 221.181.200.220

2021-01-16-----2021-02-28 222.222.88.80

2021-01-31-----2021-02-28 58.218.215.139

2021-02-05-----2021-02-28 125.37.206.224

2021-02-22-----2021-02-28 114.80.187.101

2021-02-22-----2021-02-28 36.156.81.234

2021-02-26-----2021-02-28 121.207.229.148

2021-01-16-----2021-02-26 122.225.34.201

2021-02-26-----2021-02-26 61.172.205.224

2021-01-16-----2021-02-22 60.217.246.180

2021-02-05-----2021-02-22 125.77.142.120

2021-01-16-----2021-02-05 61.172.205.222

2021-01-31-----2021-01-31 139.215.131.222

2021-01-31-----2021-01-31 221.181.200.200

2021-01-16-----2021-01-16 222.85.26.234