iP or domain name lookup

a5t.iotchs.xyz Server iP：

Current resolution：

domain resolution record：

2020-08-03-----2021-09-07 101.37.243.249

2020-08-03-----2021-09-06 118.31.33.14

2020-09-18-----2021-09-06 121.196.220.1

2021-09-06-----2021-09-06 120.55.62.24

2020-08-03-----2020-09-22 116.62.70.70

2020-09-22-----2020-09-22 118.31.72.67