go
not.norid.no has one IP number , which also has a corresponding reverse pointer. no use this as a nameserver. norid.no is a domain controlled by four nameservers. Two of them are on the same IP network. Incoming mail for norid.no is handled by one mailserver at norid.no themselves. norid.no has one IP number. not.norid.no is hosted on a server in United States even though the hostname implies Norway.

not.norid.no
a records
 
+ 156.154.100.12 156.154.100.0/24 AS12008 -
+ --- -

norid.no
a records
 
+ 158.38.130.17 158.36.0.0/14 AS224  
+ ---  
ns-soa records
biff.uninett.no
+ 158.38.180.21 158.36.0.0/14 AS224  
+ ---  
ns records
nac.no
+ 128.39.2.22 128.39.0.0/16 AS224 -
+ --- -
+ --- hegre.uninett.no
server.nordu.net
+ 193.10.252.19 193.10.252.0/24 AS2603 -
+ --- -
nn.uninett.no
+ 158.38.0.181 158.36.0.0/14 AS224 -
biff.uninett.no
+ 158.38.180.21 158.36.0.0/14 AS224  
+ ---  
mx records
charm.norid.no
+ 128.39.8.42 128.39.0.0/16 AS224 -
+ --- -
ip numbers of host
156.154.100.12
ptrs of ip numbers
not.norid.no
ip numbers using ptr to this host
156.154.100.12
198.133.199.104
domains using this as nameserver
no