go
mail.telcomsoft.com has one IP number , which also has a corresponding reverse pointer. mail.investor.bg and mail.teenproblem.net point to the same IP. mp3.bg, blog.bg, nasamnatam.bg and aktivproperties.com use this as a mailserver. telcomsoft.com is a domain controlled by two nameservers at bgdns.net. They are on different IP networks. Incoming mail for telcomsoft.com is handled by one mailserver at page.bg. mail.telcomsoft.com is hosted on a server in Bulgaria.

mail.telcomsoft.com
a records
 
+ 194.12.227.222 194.12.224.0/19 AS8262 -
+ --- -

telcomsoft.com
ns-soa records
redirns1.bgdns.net
+ 87.120.40.31 87.120.40.0/24 AS13147 redirect.host.bg
+ --- redirect.host.bg
ns records
redirns1.bgdns.net
+ 87.120.40.31 87.120.40.0/24 AS13147 redirect.host.bg
+ --- redirect.host.bg
redirns2.bgdns.net
+ 188.40.255.43 188.40.0.0/16 AS24940 cyclone.host.bg
+ --- cyclone.host.bg
mx records
mail.page.bg
+ 194.12.229.233 194.12.224.0/19 AS8262  
+ ---  
ip numbers of host
194.12.227.222
ptrs of ip numbers
mail.telcomsoft.com
ip numbers using ptr to this host
194.12.227.222
hostnames sharing ip with a-records
mail.investor.bg
mail.teenproblem.net
domains using this as mailserver
aktivproperties.com
blog.bg
mp3.bg
nasamnatam.bg