go
ns3.yahoo.com has one IP number , which also has a corresponding reverse pointer. retiononline.com and zeusfinancegroup.com point to the same IP. av.com, who.com, icio.us, yahoo.pk, yimg.com and at least 100 other hosts use this as a nameserver. yahoo.com is delegated to five nameservers, however two extra nameservers are listed in the zone. All nameservers are at yahoo.com themselves. All of them are on different IP networks. Incoming mail for yahoo.com is handled by six mailservers having a total of eight IP numbers. Some of them are on the same IP network. yahoo.com has three IP numbers. All of them are on different IP networks. ns3.yahoo.com is hosted on a server in India.

ns3.yahoo.com
a records
 
+ 121.101.152.99 121.101.152.0/23 AS23879 -
+ --- -

yahoo.com
a records
 
+ 69.147.114.224 69.147.96.0/19 AS14779  
+ ---  
+ 209.131.36.159 209.131.32.0/20 AS36752  
+ 209.191.93.53 209.191.64.0/18 AS14780  
ns-soa records
ns1.yahoo.com
+ 68.180.131.16 68.180.131.0/24 AS10880 -
+ --- -
ns records
ns1.yahoo.com
+ 68.180.131.16 68.180.131.0/24 AS10880 -
+ --- -
ns2.yahoo.com
+ 68.142.255.16 68.142.255.0/24 AS7280 -
ns3.yahoo.com
+ 121.101.152.99 121.101.152.0/23 AS23879 -
ns4.yahoo.com
+ 68.142.196.63 68.142.192.0/19 AS14780 -
ns5.yahoo.com
+ 119.160.247.124 119.160.240.0/20 AS10229 -
ns8.yahoo.com
+ 202.165.104.22 202.165.104.0/22 AS10228 -
ns6.yahoo.com
+ 202.43.223.170 202.43.220.0/22 AS18293 -
mx records
a.mx.mail.yahoo.com
+ 67.195.168.31 67.195.160.0/19 AS14778 mta-v1.mail.vip.ac4.yahoo.com
+ --- mta-v1.mail.vip.ac4.yahoo.com
b.mx.mail.yahoo.com
+ 66.196.82.7 66.196.80.0/21 AS14779 mta-v15.mail.vip.re1.yahoo.com
+ --- mta-v15.mail.vip.re1.yahoo.com
+ 74.6.136.65 74.6.128.0/20 AS14777 mta-v1.mail.vip.sk1.yahoo.com
+ --- mta-v1.mail.vip.sk1.yahoo.com
c.mx.mail.yahoo.com
+ 206.190.54.127 206.190.32.0/19 AS14779 mta-v1.mail.vip.re4.yahoo.com
+ --- mta-v1.mail.vip.re4.yahoo.com
+ 209.191.88.254 209.191.64.0/18 AS14780 mta-v1.mail.vip.mud.yahoo.com
+ --- mta-v1.mail.vip.mud.yahoo.com
e.mx.mail.yahoo.com
+ 67.195.168.230 67.195.160.0/19 AS14778 mta-v2.mail.vip.ac4.yahoo.com
+ --- mta-v2.mail.vip.ac4.yahoo.com
f.mx.mail.yahoo.com
+ 98.137.54.237 98.137.32.0/19 AS36752 mta-v1.mail.vip.sp2.yahoo.com
+ --- mta-v1.mail.vip.sp2.yahoo.com
g.mx.mail.yahoo.com
+ 98.137.54.238 98.137.32.0/19 AS36752 mta-v2.mail.vip.sp2.yahoo.com
+ --- mta-v2.mail.vip.sp2.yahoo.com
ip numbers of host
121.101.152.99
ptrs of ip numbers
ns3.yahoo.com
ip numbers using ptr to this host
121.101.152.99
hostnames sharing ip with a-records
retiononline.com
zeusfinancegroup.com
domains using this as nameserver
101.196.66.in-addr.arpa
102.30.72.in-addr.arpa
104.165.202.in-addr.arpa
111.252.216.in-addr.arpa
113.28.67.in-addr.arpa
120.109.216.in-addr.arpa
123.196.66.in-addr.arpa
124.109.216.in-addr.arpa
125.196.66.in-addr.arpa
126.196.66.in-addr.arpa
131.6.74.in-addr.arpa
136.157.64.in-addr.arpa
137.157.64.in-addr.arpa
161.152.200.in-addr.arpa
161.163.66.in-addr.arpa
168.73.209.in-addr.arpa
170.73.209.in-addr.arpa
176.160.202.in-addr.arpa
180.160.202.in-addr.arpa
187.73.209.in-addr.arpa
196.142.68.in-addr.arpa
197.250.63.in-addr.arpa
199.250.63.in-addr.arpa
200.43.202.in-addr.arpa
203.250.63.in-addr.arpa
204.136.216.in-addr.arpa
204.250.63.in-addr.arpa
207.250.63.in-addr.arpa
208.250.63.in-addr.arpa
210.250.63.in-addr.arpa
211.250.63.in-addr.arpa
215.30.72.in-addr.arpa
229.94.66.in-addr.arpa
234.142.68.in-addr.arpa
234.94.66.in-addr.arpa
240.209.203.in-addr.arpa
249.142.68.in-addr.arpa
251.142.68.in-addr.arpa
255.142.68.in-addr.arpa
3.12.217.in-addr.arpa
30.72.in-addr.arpa
4.12.217.in-addr.arpa
53.190.206.in-addr.arpa
6.74.in-addr.arpa
65.218.66.in-addr.arpa
65.6.74.in-addr.arpa
70.218.66.in-addr.arpa
71.218.66.in-addr.arpa
72.6.74.in-addr.arpa
75.147.69.in-addr.arpa
79.58.64.in-addr.arpa
86.218.66.in-addr.arpa
87.191.209.in-addr.arpa
91.196.66.in-addr.arpa
97.196.66.in-addr.arpa
98.115.216.in-addr.arpa
a2s.yahoo.com
ac2.yahoo.com
accountcheckemailsyahoo.com
adinterax.com
ahoo-inc.info
altavista.com
altavista.de
altavista.fr
altavistaeurope.org
astrologyyahoo.com
av.com
broadcastplanet.net
calendar.yahoo.com
cardgameyahooinfo.com
chatpunteryahoo.com
chatyahooclosed.com
comwwyahoo.com
corp.ukl.yahoo.com
crawl.yahoo.net
createyahooemailaccounts.com
del.icio.us
flickr.com
geocities.com
goyahoo.com
hotprize.com
icio.us
indextools.com
inktomi.com
inktomisearch.com
ird.yahoo.com
koehler29i29yahoo.com
krx.yahoo.com
mud.yahoo.com
premiumservices.yahoo.com
re1.yahoo.com
re2.yahoo.com
re3.yahoo.com
re4.yahoo.com
resolver.net
rightmedia.com
rightmedia.net
rightmediaexchange.com
rmxads.com
sc8.yahoo.com
sk1.yahoo.com
sp1.yahoo.com
store.yahoo.com
ukl.yahoo.com
who.com
yahomail.com
yahoo.bg
yahoo.co.id
yahoo.co.kr
yahoo.com
yahoo.com.bd
yahoo.es
yahoo.hu
yahoo.net
yahoo.pk
yahooligans.com
yahoomail.com
yieldmanager.com
yimg.com
ysm.yahoo.com
nameservers missing in parent delegation
ns6.yahoo.com
ns8.yahoo.com
used as nameserver but missing in parent delegation
229.94.66.in-addr.arpa
7sport.com.au
ahoo.com
ahoos.com
altavista.es
arabicyahoo.com
buscaeducacao.net.br
chemyahoo.com
dslsbcyahoo.com
flikr.com
gamesdomain.co.uk
ground-force.com.au
hahoo.com
harrys-practice.com.au
hojobs.net
homeandaway.com.au
i7.com.au
mapsyahoo.net
myyahoomail.com
onesearch.com
sbcyahoo.net
seven.net.au
sexyyahoo.com
sportswatch.com.au
todaytonight.com.au
uahoo.net
wickywackywoohoo.net
yachoo.com
yahho.com
yahoo-admins.net
yahoo.as
yahoo.az
yahoo.ba
yahoo.bi
yahoo.bo
yahoo.co.tt
yahoo.com.es
yahoo.com.hk
yahoo.com.ly
yahoo.com.tr
yahoo.com.vn
yahoo.dm
yahoo.es
yahoo.gl
yahoo.je
yahoo.jobs
yahoo.kz
yahoo.ly
yahoo.pr
yahoo.sg
yahoo.vn
yahoo1.com
yahoogroup.com
yahoohelp.net
yahoologin.com
yahoomasenger.com
yahoomusicvideo.com
yehoo.com
yhool.com
yhoomail.com
ypn.se
used as nameserver but missing in zone
128.207.65.in-addr.arpa
137.98.in-addr.arpa
138.98.in-addr.arpa
139.98.in-addr.arpa
aboutyahoo.com
alohabowl.net
blogsport.com
bluelace2uyahoo.net
candidatetracker.net
coches-nuevos-yahoo.net
collegecheerleader.net
darkyahoo.net
egyyahoo.net
godawgs.net
gorivals.net
hyahoo.net
mixd.net
mumbai.yahoo.com
nahoran.com
nelouisiana.net
persianyahoo.com
proyahoo.net
ptl-online.com
rivalhigh.net
rivalnetworks.net
rivals100.net
rivals100recruiting.net
rivalscampus.net
rivalsgear.net
rivalshi.net
rivalshoops.net
rivalstv.net
rivalsuniversity.net
rivels.com
tanyahoo.net
techster.net
terra-yahoo.net
terrayahoo.net
texasfootball.net
thebigorange.net
underconstruczion.net
voiceyahoo.com
wwwyahoomail.com
y-dns.com
yahhoo.com
yahoadmfirewll.net
yahoo-anonymous.net
yahoo-cheats.net
yahoo-delinquents.net
yahoo-terra.net
yahooauctionsingapore.com
yahoobooter.net
yahooemail.com
yahoolagian.com
yahoomail.cm
yahoomail.co.id
yahoomailcom.com
yahoomexico.com
yahooracing.com