go
messenger.yahoo.com has one IP number , via cname to messenger.fy.b.yahoo.com , but the reverse is myc1.msg.vip.re2.yahoo.com. pager.yahoo.com, us.messenger.yahoo.com, mx.messenger.yahoo.com, dk.messenger.yahoo.com, au.messenger.yahoo.com and at least six other hosts cnames to this hostname. jpager.yahoo.com, messenger.yahoo.akadns.net, myc1.msg.vip.re2.yahoo.com and crw27.vc.search.re2.yahoo.com point to the same IP. us.messenger.yahoo.com, tw.messenger.yahoo.com, mx.messenger.yahoo.com, dk.messenger.yahoo.com, au.messenger.yahoo.com and at least 17 other hosts are subdomains to this hostname. 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. messenger.yahoo.com is hosted on a server in United States.

messenger.yahoo.com
cname records
messenger.fy.b.yahoo.com
+ 68.142.230.204 68.142.224.0/20 AS14779 myc1.msg.vip.re2.yahoo.com
+ --- myc1.msg.vip.re2.yahoo.com

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
68.142.230.204
ptrs of ip numbers
myc1.msg.vip.re2.yahoo.com
hostnames sharing ip with a-records
crw27.vc.search.re2.yahoo.com
jpager.yahoo.com
messenger.fy.b.yahoo.com
messenger.yahoo.akadns.net
myc1.msg.vip.re2.yahoo.com
cname
messenger.fy.b.yahoo.com
hostnames pointing here by cname
au.beta.messenger.yahoo.com
au.messenger.yahoo.com
beta.messenger.yahoo.com
dk.messenger.yahoo.com
fr.messenger.yahoo.com
in.messenger.yahoo.com
malaysia.messenger.yahoo.com
mx.messenger.yahoo.com
pager.yahoo.com
uk.messenger.yahoo.com
us.messenger.yahoo.com
subdomains
au.messenger.yahoo.com
beta.messenger.yahoo.com
chat.messenger.yahoo.com
dk.messenger.yahoo.com
espanol.messenger.yahoo.com
fr.messenger.yahoo.com
gamma.messenger.yahoo.com
httpes.messenger.yahoo.com
in.messenger.yahoo.com
insider.messenger.yahoo.com
isp.messenger.yahoo.com
malaysia.messenger.yahoo.com
mx.messenger.yahoo.com
pdate.messenger.yahoo.com
penguin1.messenger.yahoo.com
tab.messenger.yahoo.com
tw.messenger.yahoo.com
uk.messenger.yahoo.com
update.messenger.yahoo.com
us.messenger.yahoo.com
web.messenger.yahoo.com
www.messenger.yahoo.com
nameservers missing in parent delegation
ns6.yahoo.com
ns8.yahoo.com