go
ns-ext.isc.org has one IP number , which also has a corresponding reverse pointer. c.nic.so and ns-ext.vix.com point to the same IP. co.gy, co.il, ac.il, co.zw, org.np and at least 95 other hosts use this as a nameserver. isc.org is a domain controlled by four nameservers. All of them are on different IP networks. Incoming mail for isc.org is handled by two mailservers on different IP networks. isc.org has one IP number. ns-ext.isc.org is hosted on a server in United States.

ns-ext.isc.org
a records
 
+ 204.152.184.64 204.152.184.0/21 AS1280 -
+ --- -

isc.org
a records
 
+ 149.20.64.42 149.20.0.0/16 AS1280  
+ ---  
ns-soa records
 
+   AS?  
+ ---  
ns records
sfba.sns-pb.isc.org
+ 149.20.64.3 149.20.0.0/16 AS1280 -
+ --- -
ord.sns-pb.isc.org
+ 199.6.0.30 199.6.0.0/24 AS33071 -
ams.sns-pb.isc.org
+ 199.6.1.30 199.6.1.0/24 AS30132 -
ns.isc.afilias-nst.info
+ 199.254.63.254 199.254.63.0/24 AS12041 -
mx records
mx.ams1.isc.org
+ 199.6.1.65 199.6.1.0/24 AS30132 -
+ --- -
mx.isc.org
+ 204.152.184.167 204.152.184.0/21 AS1280 -
ip numbers of host
204.152.184.64
ptrs of ip numbers
ns-ext.isc.org
ip numbers using ptr to this host
204.152.184.64
hostnames sharing ip with a-records
c.nic.so
ns-ext.vix.com
domains using this as nameserver
0-27.185.152.204.in-addr.arpa
11.6.199.in-addr.arpa
128-25.fraar.com
143.22.195.in-addr.arpa
143.41.202.in-addr.arpa
145.41.202.in-addr.arpa
146.41.202.in-addr.arpa
224.98.203.in-addr.arpa
241.75.217.in-addr.arpa
243.109.193.in-addr.arpa
248.62.204.in-addr.arpa
251.158.192.in-addr.arpa
4.5.192.in-addr.arpa
48.175.192.in-addr.arpa
64.20.149.in-addr.arpa
73.164.in-addr.arpa
80.228.192.in-addr.arpa
88.228.192.in-addr.arpa
90.212.199.in-addr.arpa
90.228.192.in-addr.arpa
91.228.192.in-addr.arpa
98.101.192.in-addr.arpa
ac.il
afnog.org
anog.net
anog.org
arcticnames.ca
arcticnames.com
benedelman.org
betterdogfood.com
billgaetjens.com
cix.net
co.gy
co.il
co.zw
com.gy
com.np
curryboys.net
dbc.mtview.ca.us
dns-moda.org
doggieblog.com
doggiering.com
edns.org
edu.np
edu.uy
fax.org
fdu.edu
gov.np
gub.uy
hall.org
hankinsfamily.info
invisible.net
itm-inst.com
k12.il
laguna.vix.com
malamud.com
mappamundi.net
media.org
memory.org
mercenary.net
mil.np
mil.uy
mundi.net
mybetterdog.com
net.gy
net.il
net.np
net.uy
nic.cl
ntp.isc.org
openldap.org
org.il
org.np
org.pt
org.uy
palace.org
park.org
patho.gen.nz
pole.org
portal-to-web.de
quirkafleeg.com
quirkafleeg.net
resource.org
sanxion.org
scalehelis.com
school.fj
sendmail.com
sendmail.net
sixes.net
sorcery.net
spamnation.info
strawberrybb.com
stueberl.de
tele.dk
undernet.org
undesign.org
wa3dbj.vix.com
webchick.org
woodsidejr.org
zer0.org
domains using this as nameserver under another name
0-27.185.152.204.in-addr.arpa
0-63.9.208.63.in-addr.arpa
111.32.198.in-addr.arpa
118.32.198.in-addr.arpa
119.32.198.in-addr.arpa
175.127.194.in-addr.arpa
176.32.198.in-addr.arpa
190.32.198.in-addr.arpa
64-26.0.149.193.in-addr.arpa
85.193.in-addr.arpa
86.193.in-addr.arpa
anog.net
anog.org
atl1.paix.net
benedelman.org
cix.net
co.zw
com.np
coreybay.com
dfw1.paix.net
kooks.net
so
sorcery.net
wwiv.net
used as nameserver but missing in parent delegation
20.119.203.in-addr.arpa
243.109.193.in-addr.arpa
243.93.200.in-addr.arpa
4.5.192.in-addr.arpa
90.212.199.in-addr.arpa
98.101.192.in-addr.arpa
a21.com
achildsdream.ph
anog.net
anog.org
cix.net
co.zw
diamondsintherough.ph
dns-moda.org
edns.org
fachschaft-muwi.de
ha-col.co.il
nrt1.isc.org
philippinepeacekeepers.ph
scalehelis.com
udosteinegger.com
used as nameserver but missing in zone
0-27.185.152.204.in-addr.arpa
224.98.203.in-addr.arpa
225.98.203.in-addr.arpa
66.20.149.in-addr.arpa
benedelman.org
brierdr.com
laguna.vix.com
local.isc.org
sorcery.net
spamnation.info
wa3dbj.vix.com