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mail.santapoco.com has one IP number , which is the same as for santapoco.com. mail.santapoco.com also has a corresponding reverse pointer , via cname. santapoco.com is a domain controlled by two nameservers at domaincontrol.com. They are on different IP networks. Incoming mail for santapoco.com is handled by two mailservers on different IP networks. mail.santapoco.com is hosted on a server in United States.

mail.santapoco.com
cname records
santapoco.com
+ 65.114.142.178 65.112.0.0/12 AS209 mail.santapoco.com
+ --- mail.santapoco.com

santapoco.com
a records
 
+ 65.114.142.178 65.112.0.0/12 AS209 mail.santapoco.com
+ --- mail.santapoco.com
ns records
ns45.domaincontrol.com
+ 216.69.185.23 216.69.185.0/24 AS26496 -
+ --- -
ns46.domaincontrol.com
+ 208.109.255.23 208.109.255.0/24 AS26496 -
mx records
mail.dirkeyman.com
+   AS?  
+ ---  
mail.eyman.net
+ 66.92.172.210 66.92.0.0/15 AS23504 dsl092-172-210.wdc2.dsl.speakeasy.net
+ --- dsl092-172-210.wdc2.dsl.speakeasy.net
ip numbers of host
65.114.142.178
ptrs of ip numbers
mail.santapoco.com
ip numbers using ptr to this host
65.114.142.178
hostnames sharing ip with a-records
santapoco.com
cname
santapoco.com