iP or domain name lookup

acm.hdu.edu.cn Server iP：

Current resolution：

domain resolution record：

2021-07-12-----2025-07-07 218.75.123.164

2024-07-26-----2025-03-27 210.32.32.105

2021-07-12-----2024-04-05 60.12.8.164

2021-07-12-----2022-01-22 210.32.32.129

2017-04-23-----2021-06-27 218.75.123.181

2017-04-23-----2021-06-27 218.75.123.182

2017-04-23-----2021-06-12 60.12.8.182

2017-07-22-----2021-06-12 60.12.8.181

2017-10-01-----2017-10-26 192.168.100.16