fbcdn.net.		30 IN SOA a.ns.facebook.com. dns.facebook.com. (
				4207849484 ; serial
				14400      ; refresh (4 hours)
				1800       ; retry (30 minutes)
				604800     ; expire (1 week)
				300        ; minimum (5 minutes)
				)

fbcdn.net.		30 IN TXT "v=spf1 a ~all"

fbcdn.net.		30 IN A	157.240.247.35
fbcdn.net.		30 IN AAAA 2a03:2880:f145:82:face:b00c:0:25de

Name servers:
fbcdn.net.		30 IN NS c.ns.facebook.com.
fbcdn.net.		30 IN NS d.ns.facebook.com.
fbcdn.net.		30 IN NS a.ns.facebook.com.
fbcdn.net.		30 IN NS b.ns.facebook.com.