shell:$ nslookup -timeout=2 -retry=1 'www.ucas.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	www.ucas.com
Address: 104.18.28.88
Name:	www.ucas.com
Address: 104.18.29.88
Name:	www.ucas.com
Address: 2606:4700::6812:1c58
Name:	www.ucas.com
Address: 2606:4700::6812:1d58