go
alf.stack.nl has one IP number , which also has a corresponding reverse pointer , via cname to alf-c.stack.nl. alf-f.stack.nl point to the same IP. stack.nl is a domain controlled by three nameservers. All of them are on the same IP network. Incoming mail for stack.nl is handled by two mailservers at stack.nl themselves. They are on the same IP network. alf.stack.nl is hosted on a server in Netherlands.

alf.stack.nl
cname records
alf-c.stack.nl
+ 131.155.141.101 131.155.0.0/16 AS1161 alf.stack.nl
+ --- alf.stack.nl

stack.nl
ns-soa records
zen.stack.nl
+ 131.155.140.130 131.155.0.0/16 AS1161 -
+ --- -
ns records
zen.stack.nl
+ 131.155.140.130 131.155.0.0/16 AS1161 -
+ --- -
ns1.tue.nl
+ 131.155.2.3 131.155.0.0/16 AS1161 -
ns2.tue.nl
+ 131.155.3.3 131.155.0.0/16 AS1161 -
mx records
mx0.stack.nl
+ 131.155.140.226 131.155.0.0/16 AS1161 -
+ --- -
mx1.stack.nl
+ 131.155.140.227 131.155.0.0/16 AS1161 -
ip numbers of host
131.155.141.101
ptrs of ip numbers
alf.stack.nl
ip numbers using ptr to this host
131.155.141.101
hostnames sharing ip with a-records
alf-c.stack.nl
alf-f.stack.nl
cname
alf-c.stack.nl