go
ns.joker.com has one IP number , which also has a corresponding reverse pointer. r.ns.joker.com, k.ns.joker.com, m.ns.joker.com, p.ns.joker.com, a.ns.joker.com and at least six other hosts are subdomains to this hostname. joker.com is a domain controlled by three nameservers at ns.joker.com. All of them are on different IP networks. Incoming mail for joker.com is handled by one mailserver at nrw.net. joker.com has one IP number. ns.joker.com is hosted on a server in Germany.

ns.joker.com
a records
 
+ 194.245.101.41 194.245.0.0/16 AS5517 -
+ --- -

joker.com
a records
 
+ 194.245.148.200 194.245.0.0/16 AS5517  
+ ---  
ns-soa records
j.ns.joker.com
+ 207.44.185.100 207.44.128.0/17 AS21844 ext1-3.server.csl.de
+ --- ext1-3.server.csl.de
ns records
j.ns.joker.com
+ 207.44.185.100 207.44.128.0/17 AS21844 ext1-3.server.csl.de
+ --- ext1-3.server.csl.de
k.ns.joker.com
+ 159.25.49.66 159.25.48.0/20 AS5517 -
+ --- -
l.ns.joker.com
+ 66.252.21.110 66.252.0.0/19 AS23522 66-252-21-110.ext.joker.com
+ --- 66-252-21-110.ext.joker.com
mx records
mail3.nrw.net
+ 194.245.103.2 194.245.0.0/16 AS5517 csl17.csl-gmbh.net
+ --- csl17.csl-gmbh.net
ip numbers of host
194.245.101.41
ptrs of ip numbers
ns.joker.com
ip numbers using ptr to this host
194.245.101.41
subdomains
a.ns.joker.com
b.ns.joker.com
c.ns.joker.com
hold.ns.joker.com
j.ns.joker.com
k.ns.joker.com
l.ns.joker.com
m.ns.joker.com
p.ns.joker.com
q.ns.joker.com
r.ns.joker.com