go
domreg.nic.ch has one IP number , which also has a corresponding reverse pointer. a.nic.ch and a.nic.li point to the same IP. birmaklub.ch, supermedia.ch, 1.4.e164.arpa and 3.2.4.e164.arpa use this as a nameserver. 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. domreg.nic.ch is hosted on a server in Switzerland.

domreg.nic.ch
a records
 
+ 130.59.1.80 130.59.0.0/16 AS559 -
+ --- -

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
130.59.1.80
ptrs of ip numbers
domreg.nic.ch
ip numbers using ptr to this host
130.59.1.80
hostnames sharing ip with a-records
a.nic.ch
a.nic.li
domains using this as nameserver
1.4.e164.arpa
3.2.4.e164.arpa
birmaklub.ch
supermedia.ch
domains using this as nameserver under another name
ch
li
used as nameserver but missing in parent delegation
birmaklub.ch
supermedia.ch