facebook.biz

• Delegation
• Authoritative answer
• Related hostnames

Delegation

Authoritative answer

ANSWER for facebook.biz.
facebook.biz.	3600	SOA	a.ns.facebook.com. dns.facebook.com. ( 2013061800 14400 1800 604800 3600 )
	172800	NS	a.ns.facebook.com.
	172800	NS	b.ns.facebook.com.
	900	AAAA	2a03:2880:2110:df07:face:b00c:0:1
	900	A	173.252.110.27
ADDITIONAL for facebook.biz.
a.ns.facebook.com.	172800	A	69.171.239.12
b.ns.facebook.com.	172800	A	69.171.255.12

Related hostnames

Facebook.com, facebook.dk, fcaebook.com, facebook.co, facebooksuppliers.com and at least 35 other hosts point to the same IP and also shares name servers. Faceebok.com, facebook-login.com, facebook.cl, facebook.es, facebook.no and at least 76 other hosts point to the same IP. Friendfeed-api.com, friendfeed-media.com, facebookappmail.com, oglint.com, facebookdownloader.com and at least 126 other hosts share name servers with this domain. M.facebook.biz and www.facebook.biz are hosts under this domain. Facebook.ma, facebook.bi, facebook.pm, facebook.vc, facebook.bg and at least 146 other hosts are similar domain names.

Also check www.facebook.biz.

The name server b.ns.facebook.com

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

• Most of those use the two name servers a and b.ns.facebook.com together, hereafter referred to as "name server group 1", (example: 235.171.69.in-addr.arpa, 229.171.69.in-addr.arpa and 156.220.66.in-addr.arpa ).
• One quarter of them point only to the IP number 173.252.110.27 (example: facebook.bs, facebooklogin.com and feceboock.com ).
• Six 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: facebook.net, facebook.mobi and 79.13.31.in-addr.arpa ).
• Six of them point only to the IP number 69.171.233.18 (example: ffbymail.com ).

The name server a.ns.facebook.com

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

• Most of those use name server group 1 (example: facebook.be, 78.252.173.in-addr.arpa and 91.252.173.in-addr.arpa ).
• A third of them point only to the IP number 173.252.110.27 (example: fb.com, whyfacebook.com and fbookmobile.com ).
• Seven percent of them use name server group 2 (example: 78.13.31.in-addr.arpa, 72.13.31.in-addr.arpa and facebook-survey.com ).
• Six of them use the two mail servers mxa-00082601 and mxb-00082601.gslb.pphosted.com together, hereafter referred to as "mail server group 1", (example: tfbnw.com ).

The IP number 173.252.110.27

There are about ninety host names that point to the IP number 173.252.110.27.

• All of those point only to that ip number (example: facbook.com, oglint.net and facebook-domain-names.com ).
• Most of them use name server group 1 (example: facebookcom.com, facebook.jp and facebokc.com ).
• Two of them use mail server group 1 (example: thefacebook.com ).
• Two of them use name server group 2 (example: fb.me ).

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.co.jp, facebok.com and faceboot.com ). Worth noting is that most of the host names that point only to the IP number 173.252.110.27 use name server group 1.
• Six of them use only the mail server msgin.t.facebook.com (example: facebookmx.com ).
• Six of them use mail server group 1.
• Six of them point only to the IP number 69.171.233.18.

The IP number 173.252.110.27 only

Most of the about ninety host names that point only to the IP number 173.252.110.27 use name server group 1 (example: facebook.com.au, faacebook.com and facebook.nl ). Worth noting is that a third of the domains that use name server group 1 point only to the IP number 173.252.110.27.

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 (example: ns2.facebook.com, ns7.facebook.com and b.ns.facebook.com ).

The IP number 69.171.239.12

All of the five host names that point to the IP number 69.171.239.12 point only to that ip number (example: a.ns.fbcdn.net, a.ns.facebook.com and ns6.facebook.com ).

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

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

• Three of those point only to the IP number 74.205.9.114.
• Three of them point only to the IP number 69.63.176.67.