shell:$ nslookup -timeout=2 -retry=1 'lookaside-fallback.facebook.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
lookaside-fallback.facebook.com	canonical name = scontent-fallback.xx.fbcdn.net.
scontent-fallback.xx.fbcdn.net	canonical name = scontent.fallback.xx.fbcdn.net.
Name:	scontent.fallback.xx.fbcdn.net
Address: 57.144.174.128
Name:	scontent.fallback.xx.fbcdn.net
Address: 2a03:2880:f366:80:face:b00c:0:3