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

Non-authoritative answer:
mobile.o2.co.uk	canonical name = wap.o2.co.uk.
wap.o2.co.uk	canonical name = d1evsoacg6eeum.cloudfront.net.
Name:	d1evsoacg6eeum.cloudfront.net
Address: 18.172.134.72
Name:	d1evsoacg6eeum.cloudfront.net
Address: 18.172.134.37
Name:	d1evsoacg6eeum.cloudfront.net
Address: 18.172.134.28
Name:	d1evsoacg6eeum.cloudfront.net
Address: 18.172.134.76
Name:	d1evsoacg6eeum.cloudfront.net
Address: 2600:9000:24bf:800:8:da62:2b80:93a1
Name:	d1evsoacg6eeum.cloudfront.net
Address: 2600:9000:24bf:c00:8:da62:2b80:93a1
Name:	d1evsoacg6eeum.cloudfront.net
Address: 2600:9000:24bf:8a00:8:da62:2b80:93a1
Name:	d1evsoacg6eeum.cloudfront.net
Address: 2600:9000:24bf:d000:8:da62:2b80:93a1
Name:	d1evsoacg6eeum.cloudfront.net
Address: 2600:9000:24bf:fc00:8:da62:2b80:93a1
Name:	d1evsoacg6eeum.cloudfront.net
Address: 2600:9000:24bf:5e00:8:da62:2b80:93a1
Name:	d1evsoacg6eeum.cloudfront.net
Address: 2600:9000:24bf:4800:8:da62:2b80:93a1
Name:	d1evsoacg6eeum.cloudfront.net
Address: 2600:9000:24bf:ce00:8:da62:2b80:93a1