go
ns3.hmco.com has one IP number , which also has a corresponding reverse pointer. hmco.com, rigby.com, catinc.com, mlmath.com, harstz.net and at least 100 other hosts use this as a nameserver. hmco.com is a domain controlled by three nameservers at hmco.com themselves. All of them are on different IP networks. Incoming mail for hmco.com is handled by two mailservers also at hmco.com. They are on different IP networks. hmco.com has one IP number. ns3.hmco.com is hosted on a server in United States.

ns3.hmco.com
a records
 
+ 155.44.208.33 155.44.208.0/21 AS30556 -
+ --- -

hmco.com
a records
 
+ 155.44.225.32 155.44.224.0/20 AS30556  
+ ---  
ns-soa records
ns1.hmco.com
+ 155.44.218.31 155.44.216.0/21 AS30556 -
+ --- -
ns records
ns1.hmco.com
+ 155.44.218.31 155.44.216.0/21 AS30556 -
+ --- -
ns3.hmco.com
+ 155.44.208.33 155.44.208.0/21 AS30556 -
ns4.hmco.com
+ 65.59.205.25 65.56.0.0/14 AS3356 -
mx records
bosmail1.hmco.com
+ 155.44.218.58 155.44.216.0/21 AS30556 -
+ --- -
evnmail1.hmco.com
+ 65.59.205.23 65.56.0.0/14 AS3356 -
ip numbers of host
155.44.208.33
ptrs of ip numbers
ns3.hmco.com
ip numbers using ptr to this host
155.44.208.33
domains using this as nameserver
105.208.206.in-addr.arpa
208.167.in-addr.arpa
44.155.in-addr.arpa
6traits.net
ahdictionary.net
americanheritagedict.net
bestamericans.net
brodcast.net
catglobal.net
catinc.com
cattest.com
chewonthis-thebook.net
chewonthisbook.net
chewonthisnews.net
clarionbooks.net
classroom.net
classroomcompass.net
classwell.com
classzone.com
curious-george.net
curiousgeorge.net
curiousgeorgebooks.net
curiousworld.com
educationmediaandpublishing.net
educationmediaandpublishinggroup.net
educationmediapublishing.net
eduplace.com
edusoft.com
ereferenceupdate.net
everythingaboutfastfood.net
expressit.com
fastfoodnation-thebook.net
fastfoodnationbook.net
georgeandmartha.net
georgeworld.com
graphiabooks.net
greatsource.com
gsprofessionaldevelopment.net
harcourt.com
harcourtachieve.com
harcourtachieve.net
harcourtcollege.com
harcourteducation.net
harcourtgeneral.com
harcourtlearningcenter.net
harcourtschoolsupply.com
harcourtspectrum.com
harcourttherapy.net
harstz.net
hbcollege.com
hbschool.com
hbtechsupport.com
hm-books.net
hmco.com
hmcobooks.net
houghtonbooks.net
houghtonmifflinbooks.com
houghtonmifflinbooks.net
houghtonmifflinonline.net
hrwcollege.com
hrwtechsupport.com
innovationresearch.net
isucceedmath.net
isucceedreading.net
isucceedscience.net
jrrtolkienbooks.net
kaufmanfocusguides.net
knowledge-beyond-doubt.net
knowledgebeyonddoubt.net
learningco.com
lordoftheringstrilogy.net
marinerbooks.net
mcdougallittell.com
mikemulligan.com
mikemulligan.net
mlmath.com
mlushistory.com
mlworldhistory.com
northstar4school.com
northstarachieve.com
northstarreading.com
northstarsaxon.com
northstarsocialstudies.com
petersonfieldguides.net
petersonfirstguides.net
petersonflashguides.net
petersononline.com
polarexpress.com
promisor.net
readingtolearn.net
rigby-educ.com
rigby.com
rigbyflyingcolors.com
riverdeep.net
riverpub.com
rottenralph.net
saxonhomeschool.com
saxonhomeschooltutor.com
saxonpub.com
saxonpublishers.com
saxonsuccess.com
schooldirect.com
sixtraits.net
spellingforwriters.net
spider-bridge.com
spider-bridge.net
steck-vaughn.com
steckvaughn.com
summersuccess.net
svschoolsupply.com
sweetestfig.net
taylorsgardeningguides.net
taylorsguides.net
teacheruniverse.net
tenminuteteacher.net
thepolarexpress.net
widowsbroom.net
writerules.net
writetraits.net
zathura.net
used as nameserver but missing in zone
catinc.com
cattest.com
harcourtassessment.com
knowledge-beyond-doubt.net
knowledgebeyonddoubt.net
promisor.net
reachforreading.com