iP or domain name lookup

c21752.cac788.com Server iP：

Current resolution：

domain resolution record：

2020-12-31-----2021-07-13 172.67.158.139

2021-02-12-----2021-07-13 104.21.14.92

2020-12-31-----2021-01-07 104.31.82.252

2020-12-31-----2021-01-07 104.31.83.252

2020-05-03-----2020-07-06 104.28.3.234

2020-05-03-----2020-07-06 104.28.2.234

2020-07-06-----2020-07-06 172.67.155.45