shell:$ nslookup -timeout=2 -retry=1 'fast.globetelecoms.demdex.net'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
fast.globetelecoms.demdex.net	canonical name = cdn.demdex.net.edgesuite.net.
cdn.demdex.net.edgesuite.net	canonical name = a311.g.akamai.net.
Name:	a311.g.akamai.net
Address: 23.223.17.131
Name:	a311.g.akamai.net
Address: 23.223.17.139