shell:$ nslookup -timeout=2 -retry=1 'www.twitter.co.uk'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
www.twitter.co.uk	canonical name = twitter.co.uk.
Name:	twitter.co.uk
Address: 104.244.42.193
Name:	twitter.co.uk
Address: 104.244.42.129
Name:	twitter.co.uk
Address: 104.244.42.1
Name:	twitter.co.uk
Address: 104.244.42.65