ns2.facebook.com

• Delegation
• Authoritative answer
• Related hostnames

Delegation

Authoritative answer

ANSWER for ns2.facebook.com.
ns2.facebook.com.	3600	A	69.171.255.12
AUTHORITATIVE for ns2.facebook.com.
facebook.com.	172800	NS	a.ns.facebook.com.
	172800	NS	b.ns.facebook.com.
ADDITIONAL for ns2.facebook.com.
a.ns.facebook.com.	172800	A	69.171.239.12
b.ns.facebook.com.	172800	A	69.171.255.12

Related hostnames

Ns7.facebook.com, b.ns.facebook.com, b.ns.tfbnw.net, b.ns.fbcdn.net and b.ns.thefacebook.com point to the same IP. Moochspot.com, fbcdn.net, facebook.org, freindfeed.com, facebook.dk and at least 70 other hosts use ns2.facebook.com as a name server under another name.

Also check www.facebook.com and facebook.com.

The name server b.ns.facebook.com

There are more than two hundred domains that use the name server b.ns.facebook.com.

• Three quarter of those use the two name servers a and b.ns.facebook.com together, hereafter referred to as "name server group 1", (example: facebook.it, facebookmx.com and 178.63.69.in-addr.arpa ).
• A third of them point only to the IP number 173.252.110.27 (example: facebook-inc.com, fcaebook.com and facepok.com ).
• Ten percent of them use the five name servers ns3.facebook.com, ns4.facebook.com, ns5.facebook.com, a.ns.facebook.com and b.ns.facebook.com together, hereafter referred to as "name server group 2", (example: 126.13.31.in-addr.arpa, 69.13.31.in-addr.arpa and 145.220.66.in-addr.arpa ).
• Seven of them point only to the IP number 69.171.233.18 (example: friendfeedapi.com ).

The two name servers a and b.ns.facebook.com together

There are more than two hundred domains that use name server group 1.

• A third of those point only to the IP number 173.252.110.27 (example: facebook.us, facebook.co.nz and facebook.vn ).
• Seven of them use the two mail servers mxa-00082601 and mxb-00082601.gslb.pphosted.com together (example: tfbnw.net and tfbnet.net ).
• Three of them use only the mail server msgin.t.facebook.com.

The five name servers ns3.facebook.com, ns4.facebook.com, ns5.facebook.com, a.ns.facebook.com and b.…

There are about thirty domains that use name server group 2.

• Seven of those point only to the IP number 69.171.233.18.
• Three of them point only to the IP number 69.63.176.36.

The IP number 69.171.255.12

All of the six host names that point to the IP number 69.171.255.12 point only to that ip number.