shell:$ nslookup -timeout=2 -retry=1 'mymobile.o2.co.uk'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
mymobile.o2.co.uk	canonical name = lbprdcachetiermymobileproxy.o2r53ctp.co.uk.
lbprdcachetiermymobileproxy.o2r53ctp.co.uk	canonical name = lbprd1cachetiermymobileproxy.o2r53ctp.co.uk.
lbprd1cachetiermymobileproxy.o2r53ctp.co.uk	canonical name = d23vhc4nag3sz7.cloudfront.net.
Name:	d23vhc4nag3sz7.cloudfront.net
Address: 13.249.141.21
Name:	d23vhc4nag3sz7.cloudfront.net
Address: 13.249.141.119
Name:	d23vhc4nag3sz7.cloudfront.net
Address: 13.249.141.87
Name:	d23vhc4nag3sz7.cloudfront.net
Address: 13.249.141.97