go
do-dns.nic.pr has one IP number , which also has a corresponding reverse pointer. do, nic.do, org.do, net.do, gov.do and at least seven other hosts use this as a nameserver. nic.pr is a domain controlled by five nameservers. Some of them are on the same IP network. Incoming mail for nic.pr is handled by one mailserver at nic.pr themselves. nic.pr has one IP number. do-dns.nic.pr is hosted on a server in Puerto Rico.

do-dns.nic.pr
a records
 
+ 134.202.1.121 134.202.0.0/16 AS36810 -
+ --- -

*.nic.pr
a records
 
+ 134.202.4.100 134.202.0.0/16 AS36810  
+ ---  

nic.pr
a records
 
+ 134.202.4.100 134.202.0.0/16 AS36810  
+ ---  
ns-soa records
pascal.nic.pr
+ 134.202.0.120 134.202.0.0/16 AS36810 -
+ --- -
ns records
pr-dns.denic.de
+ 81.91.161.82 81.91.160.0/20 AS8763 -
+ --- -
pr-ns.anycast.pch.net
+ 204.61.216.23 204.61.216.0/23 AS42 -
descartes.nic.pr
+ 134.202.1.120 134.202.0.0/16 AS36810 -
golomb.nic.pr
+ 134.202.6.100 134.202.0.0/16 AS36810 -
pascal.nic.pr
+ 134.202.0.120 134.202.0.0/16 AS36810 -
mx records
lagrange.nic.pr
+ 134.202.5.100 134.202.0.0/16 AS36810 mail.nic.pr
+ --- mail.nic.pr
+ --- -
ip numbers of host
134.202.1.121
ptrs of ip numbers
do-dns.nic.pr
ip numbers using ptr to this host
134.202.1.121
domains using this as nameserver
art.do
com.do
do
edu.do
gob.do
gov.do
mil.do
net.do
nic.do
org.do
pucmm.edu.do
web.do