shell:$ nslookup -timeout=2 -retry=1 'dev-www.ref.o2.co.uk.cdn.cloudflare.net'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	dev-www.ref.o2.co.uk.cdn.cloudflare.net
Address: 104.18.26.20
Name:	dev-www.ref.o2.co.uk.cdn.cloudflare.net
Address: 104.18.27.20
Name:	dev-www.ref.o2.co.uk.cdn.cloudflare.net
Address: 2606:4700::6812:1a14
Name:	dev-www.ref.o2.co.uk.cdn.cloudflare.net
Address: 2606:4700::6812:1b14