iP or domain name lookup

cdn.1course.cn Server iP：

Current resolution：

domain resolution record：

2022-12-21-----2022-12-21 221.204.226.111

2022-12-21-----2022-12-21 36.131.151.207

2022-12-21-----2022-12-21 211.91.70.209

2022-12-21-----2022-12-21 119.188.120.239

2022-12-21-----2022-12-21 182.40.50.240

2022-12-21-----2022-12-21 116.0.89.211

2022-12-21-----2022-12-21 223.109.76.248

2022-12-21-----2022-12-21 220.181.158.197

2022-12-21-----2022-12-21 121.14.152.244

2022-12-21-----2022-12-21 150.139.242.240

2022-12-21-----2022-12-21 182.40.50.243

2022-12-21-----2022-12-21 61.240.226.240

2022-12-21-----2022-12-21 106.8.155.238