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

Non-authoritative answer:
m.three.co.uk	canonical name = www.three.co.uk.edgekey.net.
www.three.co.uk.edgekey.net	canonical name = e1174.ksd.akamaiedge.net.
Name:	e1174.ksd.akamaiedge.net
Address: 23.194.105.108