iP or domain name lookup

app.021-dell.cn Server iP：

Current resolution：

domain resolution record：

2021-08-20-----2021-10-23 0.0.0.0

2021-08-17-----2021-08-28 47.243.62.140

2021-08-09-----2021-08-14 163.181.35.209

2021-08-09-----2021-08-14 221.181.200.221

2021-08-09-----2021-08-14 36.102.212.94

2021-08-14-----2021-08-14 123.138.67.52

2021-08-14-----2021-08-14 58.218.208.8

2021-08-14-----2021-08-14 61.184.215.228

2021-08-14-----2021-08-14 36.158.249.130

2021-08-14-----2021-08-14 101.72.205.213

2021-08-09-----2021-08-09 125.77.142.116

2021-08-09-----2021-08-09 58.216.15.222

2021-08-09-----2021-08-09 125.37.206.222

2021-08-09-----2021-08-09 123.129.244.225