shell:$ nslookup -timeout=2 -retry=1 'www.3u.com'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
www.3u.com	canonical name = www.3u.com.cdn20.com.
Name:	www.3u.com.cdn20.com
Address: 138.113.128.90
Name:	www.3u.com.cdn20.com
Address: 157.185.168.15