shell:$ nslookup -timeout=2 -retry=1 'external-lax3-1.xx.fbcdn.net'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
external-lax3-1.xx.fbcdn.net	canonical name = scontent-lax3-1.xx.fbcdn.net.
Name:	scontent-lax3-1.xx.fbcdn.net
Address: 31.13.70.7
Name:	scontent-lax3-1.xx.fbcdn.net
Address: 2a03:2880:f00d:8:face:b00c:0:1