go
mx.membersworld.net has one IP number , which is the same as for membersworld.net. membersworld.net point to the same IP. membersworld.net use this as a mailserver. membersworld.net is a domain controlled by two nameservers at webbuster.net. They are on the same IP network. Incoming mail for membersworld.net is handled by one mailserver at membersworld.net themselves. mx.membersworld.net is hosted on a server in Turkey.

mx.membersworld.net
a records
 
+ 217.173.157.136 217.173.152.0/21 AS20640  
+ ---  

membersworld.net
a records
 
+ 217.173.157.136 217.173.152.0/21 AS20640  
+ ---  
ns-soa records
ns1.webbuster.net
+ 217.173.156.33 217.173.152.0/21 AS20640 nl33.titannetworks.nl
+ --- nl33.titannetworks.nl
ns records
ns1.webbuster.net
+ 217.173.156.33 217.173.152.0/21 AS20640 nl33.titannetworks.nl
+ --- nl33.titannetworks.nl
ns2.webbuster.net
+ 217.173.157.65 217.173.152.0/21 AS20640 nl65.titannetworks.nl
+ --- nl65.titannetworks.nl
mx records
mx.membersworld.net
+ 217.173.157.136 217.173.152.0/21 AS20640  
+ ---  
ip numbers of host
217.173.157.136
hostnames sharing ip with a-records
membersworld.net
domains using this as mailserver
membersworld.net