go
a.gtld-servers.net has one IP number , which also has a corresponding reverse pointer. a1.nstld.com cnames to this hostname. edu, com, net, urbemar.net, frau-inter.net and at least three other hosts use this as a nameserver. gtld-servers.net is delegated to eight nameservers, however one delegated nameserver is missing in the zone. All nameservers are at nstld.com. All of them are on different IP networks. a.gtld-servers.net is hosted on a server in United States.

a.gtld-servers.net
a records
 
+ 192.5.6.30 192.5.6.0/24 AS36625 -
+ --- -

gtld-servers.net
ns-soa records
a2.nstld.com
+ 192.5.6.31 192.5.6.0/24 AS36625 -
+ --- -
ns records
h2.nstld.com
+ 192.54.112.31 192.54.112.0/24 AS36623 -
+ --- -
a2.nstld.com
+ 192.5.6.31 192.5.6.0/24 AS36625 -
c2.nstld.com
+ 192.26.92.31 192.26.92.0/24 AS36625 -
d2.nstld.com
+ 192.31.80.31 192.31.80.0/24 AS36617  
+ ---  
e2.nstld.com
+ 192.12.94.31 192.12.94.0/24 AS36629 -
+ --- -
f2.nstld.com
+ 192.35.51.31 192.35.51.0/24 AS36620 -
g2.nstld.com
+ 192.42.93.31 192.42.93.0/24 AS36624 -
l2.nstld.com
+ 192.41.162.31 192.41.162.0/24 AS36628 -
ip numbers of host
192.5.6.30
ptrs of ip numbers
a.gtld-servers.net
ip numbers using ptr to this host
192.5.6.30
hostnames pointing here by cname
a1.nstld.com
domains using this as nameserver
1marketsource.net
com
edu
frau-inter.net
net
ns.hostingseries43.net
ns2.hostingseries43.net
urbemar.net
nameservers missing in zone
h2.nstld.com
used as nameserver but missing in zone
ns.hostingseries43.net
ns2.hostingseries43.net