facebook.co

• Delegation
• Authoritative answer
• Related hostnames

Delegation

Authoritative answer

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

Related hostnames

Facewook.com, faceobok.com, facebook.lv, facebokc.com, facebook.jp and at least 20 other hosts point to the same IP and also shares name servers. Tfbops.com, facebook.ca, fbookmobile.com, facebook.de, facebook.bs and at least 76 other hosts point to the same IP. Tfbnet.net, frendfeed.com, friendfed.com, friendfeed-inc.com, facebook.no and at least 68 other hosts share name servers with this domain. Friendfeedmedia.com, fbookpics.com, friendfeed-api.com, fbquestions.com, faceebok.com and at least 63 other hosts share name servers under another name with this domain. Facebook.to, facebook.io, facebook.tw, facebook.be, facebook.eu and at least 200 other hosts are similar domain names.

Also check www.facebook.co.

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: fborigin.net, fbops.com and opengraphprotocol.org ).
• One quarter of them point only to the IP number 173.252.110.27 (example: fb.me, moochspot.com and facebooks.com ).
• Eleven 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: 76.13.31.in-addr.arpa, ff.im and 24.13.31.in-addr.arpa ).
• Seven percent of them point only to the IP number 69.171.233.18 (example: ffbymale.com ).

The name server a.ns.facebook.com

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

• Three quarter of those use name server group 1 (example: 72.252.173.in-addr.arpa, 118.252.173.in-addr.arpa and 239.171.69.in-addr.arpa ).
• One quarter of them point only to the IP number 173.252.110.27 (example: facebookformobileoperators.com, facebook.com.gt and facbook.com ).
• Eleven percent of them use name server group 2.
• Seven percent of them point only to the IP number 69.171.233.18.

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: oglint.org, faceboork.com and facebook.co.za ).
• Most of them use name server group 1 (example: faceboo.com, facebookhome.com and facebook.pl ).
• Two 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: thefacebook.com and fb.com ).
• Two of them use name server group 2 (example: zuckerberg.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-domain-names.com, facebook.cl and facebookcom.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.
• Seven of them use mail server group 1.
• Three of them use only the mail server msgin.t.facebook.com (example: facebookmail.com ).
• Three of them use only the mail server mx.ffbymail.com.

The IP number 173.252.110.27 only

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

• Most of those use name server group 1 (example: hsfacebook.com, facebook.com.tw and facebook.fr ). Worth noting is that one quarter of the domains that use name server group 1 point only to the IP number 173.252.110.27.
• Two of them use mail server group 1.

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

Half of the about thirty domains that use name server group 2 point only to the IP number 69.171.233.18.

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: b.ns.thefacebook.com, b.ns.tfbnw.net and ns2.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: ns1.facebook.com, a.ns.tfbnw.net and a.ns.fbcdn.net ).