go
posta.marsconcept.com has one IP number , but the reverse is posta.marssinema.com. cinemars.com, nuspa.com.tr, macatletik.com, dmaxcinema.com, macathletic.com and at least two other hosts use this as a mailserver. marsconcept.com is a domain controlled by three nameservers at dol.com.tr. Two of them are on the same IP network. Incoming mail for marsconcept.com is handled by one mailserver at marsconcept.com themselves. posta.marsconcept.com is hosted on a server in Turkey.

posta.marsconcept.com
a records
 
+ 212.154.125.58 212.154.0.0/17 AS12735 posta.marssinema.com
+ --- posta.marssinema.com

marsconcept.com
ns-soa records
doldns01.dol.com.tr
+ 213.243.1.40 213.243.1.0/24 AS12978 -
+ --- -
ns records
doldns03.dol.com.tr
+ 83.66.22.6 83.66.22.0/24 AS12978 -
+ --- -
doldns01.dol.com.tr
+ 213.243.1.40 213.243.1.0/24 AS12978 -
doldns02.dol.com.tr
+ 213.243.1.42 213.243.1.0/24 AS12978 -
mx records
posta.marsconcept.com
+ 212.154.125.58 212.154.0.0/17 AS12735 posta.marssinema.com
+ --- posta.marssinema.com
ip numbers of host
212.154.125.58
ptrs of ip numbers
posta.marssinema.com
domains using this as mailserver
cinemars.com
dmaxcinema.com
macathletic.com
macatletik.com
marsathletic.com
marsconcept.com
nuspa.com.tr