go
us.xo.net has one IP number , which also has a corresponding reverse pointer. us.xo.com and imhotep.concentric.net point to the same IP. ptr.us.xo.net, svc.us.xo.net, la3.us.xo.net, sys.us.xo.net, la-ca.us.xo.net and at least 64 other hosts are subdomains to this hostname. xo.net is a domain controlled by four nameservers at concentric.net. Some of them are on the same IP network. Incoming mail for xo.net is handled by four mailservers at xo.com. All of them are on the same IP network. xo.net has four IP numbers. All of them are on the same IP network. us.xo.net is hosted on a server in United States.

us.xo.net
a records
 
+ 207.155.184.74 207.155.128.0/17 AS2828 imhotep.concentric.net
+ --- imhotep.concentric.net
+ --- -

xo.net
a records
 
+ 207.155.248.73 207.155.248.0/21 AS4908  
+ ---  
+ 207.155.252.38 207.155.248.0/21 AS4908  
+ 207.155.252.73 207.155.248.0/21 AS4908  
+ 207.155.252.75 207.155.248.0/21 AS4908  
ns-soa records
 
+   AS?  
+ ---  
ns records
nameserver.concentric.net
+ 207.155.249.180 207.155.248.0/21 AS4908 -
+ --- -
nameserver1.concentric.net
+ 207.88.20.30 207.88.0.0/16 AS2828 -
nameserver2.concentric.net
+ 207.155.253.180 207.155.248.0/21 AS4908 -
nameserver3.concentric.net
+ 207.88.20.82 207.88.0.0/16 AS2828 -
mx records
invincible.xo.com
+ 207.155.248.74 207.155.248.0/21 AS4908 -
+ --- -
fervent.xo.com
+ 207.155.253.188 207.155.248.0/21 AS4908 -
isis.xo.com
+ 207.155.248.118 207.155.248.0/21 AS4908 -
triumph.xo.com
+ 207.155.249.187 207.155.248.0/21 AS4908 -
ip numbers of host
207.155.184.74
ptrs of ip numbers
imhotep.concentric.net
us.xo.net
ip numbers using ptr to this host
207.155.184.74
hostnames sharing ip with a-records
imhotep.concentric.net
us.xo.com
subdomains
ashburn-va.us.xo.net
atlanta-ga.us.xo.net
atlanta6-ga.us.xo.net
austin-tx.us.xo.net
baltimore-md.us.xo.net
beaverton-or.us.xo.net
cambridge-ma.us.xo.net
chi-il.us.xo.net
chicago-il.us.xo.net
chicago15-il.us.xo.net
chicago2-il.us.xo.net
cleveland-oh.us.xo.net
cleveland2-oh.us.xo.net
columbus-oh.us.xo.net
columbus2-oh.us.xo.net
dal-tx.us.xo.net
dallas-tx.us.xo.net
dallas2-tx.us.xo.net
dallas4-tx.us.xo.net
dc-chicago-il.us.xo.net
dc-fremont-ca.us.xo.net
dc-irvine-ca.us.xo.net
dc-sanjose-ca.us.xo.net
dc-secaucus-nj.us.xo.net
denver-co.us.xo.net
englewood-co.us.xo.net
fremont-ca.us.xo.net
houston-tx.us.xo.net
la-ca.us.xo.net
la3-ca.us.xo.net
la3.us.xo.net
lasvegas-nv.us.xo.net
lja-ca.us.xo.net
marylandheights-mo.us.xo.net
memphis-tn.us.xo.net
miami-fl.us.xo.net
miami2-fl.us.xo.net
minneapolis-mn.us.xo.net
nashville-tn.us.xo.net
newark-nj.us.xo.net
nyc-ny.us.xo.net
nyc2-ny.us.xo.net
oakbrook-il.us.xo.net
paloalto-ca.us.xo.net
philadelphia-pa.us.xo.net
phoenix-az.us.xo.net
ptr.us.xo.net
roseville-ca.us.xo.net
rwhois.us.xo.net
sag-mi.us.xo.net
saginaw-mi.us.xo.net
saltlake-ut.us.xo.net
saltlake2-ut.us.xo.net
sandiego-ca.us.xo.net
sanjose-ca.us.xo.net
sanjose2-ca.us.xo.net
santaana-ca.us.xo.net
scs-nj.us.xo.net
seattle-wa.us.xo.net
seattle7-wa.us.xo.net
smyrna-ga.us.xo.net
sna-ca.us.xo.net
southfield-mi.us.xo.net
spokane-wa.us.xo.net
svc.us.xo.net
sys.us.xo.net
tampa-fl.us.xo.net
vienna-va.us.xo.net
washington-dc.us.xo.net