go
mail.fwu.de has one IP number , which also has a corresponding reverse pointer. sodis.de, fwu-onlinepaket.de and bildungsmedien.biz use this as a mailserver. fwu.de is a domain controlled by two nameservers at netz-haut.net. They are on different IP networks. Incoming mail for fwu.de is handled by two mailservers having a total of four IP numbers. Two of them are on the same IP network. fwu.de has one IP number. mail.fwu.de is hosted on a server in Germany.

mail.fwu.de
a records
 
+ 217.9.97.18 217.9.96.0/19 AS8881 -
+ --- -

*.fwu.de
a records
 
+ 62.146.189.60 62.146.0.0/16 AS15598  
+ ---  

fwu.de
a records
 
+ 62.146.189.60 62.146.0.0/16 AS15598  
+ ---  
ns-soa records
ns1.netz-haut.net
+ 62.146.64.98 62.146.0.0/16 AS15598 -
+ --- -
ns records
ns1.netz-haut.net
+ 62.146.64.98 62.146.0.0/16 AS15598 -
+ --- -
ns2.netz-haut.net
+ 80.190.198.66 80.190.0.0/16 AS15598 -
mx records
mx.internetwerke.de
+ 62.146.189.9 62.146.0.0/16 AS15598 -
+ --- -
+ 80.190.198.72 80.190.0.0/16 AS15598 -
+ 80.190.198.93 80.190.0.0/16 AS15598 -
mailappl.fwu.de
+ 217.9.97.19 217.9.96.0/19 AS8881 -
ip numbers of host
217.9.97.18
ptrs of ip numbers
mail.fwu.de
ip numbers using ptr to this host
217.9.97.18
domains using this as mailserver
bildungsmedien.biz
fwu-onlinepaket.de
sodis.de