go
g.nic.ch has one IP number , but the reverse is dns.princeton.edu. g.nic.li, c.ext.nic.fr and dns.princeton.edu point to the same IP. Incoming mail for nic.ch is handled by two mailservers at switch.ch. Two mailservers have the same IP number. nic.ch has one IP number. g.nic.ch is hosted on a server in United States even though the hostname implies Switzerland.

g.nic.ch
a records
 
+ 128.112.129.15 128.112.0.0/16 AS88 dns.princeton.edu
+ --- dns.princeton.edu

nic.ch
a records
 
+ 130.59.31.247 130.59.0.0/16 AS559  
+ ---  
mx records
aletsch.switch.ch
+   AS?  
+ ---  
medel.switch.ch
+   AS?  
ip numbers of host
128.112.129.15
ptrs of ip numbers
dns.princeton.edu
hostnames sharing ip with a-records
c.ext.nic.fr
dns.princeton.edu
g.nic.li
domains using this as nameserver under another name
112.128.in-addr.arpa
114.128.in-addr.arpa
177.180.66.in-addr.arpa
180.140.in-addr.arpa
192-223.62.36.66.in-addr.arpa
2.93.192.in-addr.arpa
48.153.204.in-addr.arpa
50.153.204.in-addr.arpa
51.153.204.in-addr.arpa
60.36.66.in-addr.arpa
62.36.66.in-addr.arpa
93.128.in-addr.arpa
art.ht
com.ht
edu.ht
gouv.ht
net.ht
nic.ht
org.ht
princeton.org