go
mail.valornet.com has one IP number , which also has a corresponding reverse pointer. smtp.door.net and mail.valornet.net cnames to this hostname. valornet.com is a domain controlled by four nameservers at windstream.net. All of them are on different IP networks. Incoming mail for valornet.com is handled by one mailserver also at windstream.net. valornet.com has one IP number. mail.valornet.com is hosted on a server in United States.

mail.valornet.com
a records
 
+ 166.102.165.133 166.102.165.0/24 AS7029 -
+ --- -

valornet.com
a records
 
+ 166.102.165.202 166.102.165.0/24 AS7029  
+ ---  
ns-soa records
ns1-auth.windstream.net
+ 166.102.165.17 166.102.165.0/24 AS7029 -
+ --- -
ns records
ns1-auth.windstream.net
+ 166.102.165.17 166.102.165.0/24 AS7029 -
+ --- -
ns2-auth.windstream.net
+ 162.39.164.15 162.39.164.0/24 AS7029 -
ns4-auth.windstream.net
+ 162.40.117.251 162.40.0.0/16 AS7029 -
ns3-auth.windstream.net
+ 207.91.5.71 207.91.0.0/18 AS7029 -
mx records
mx01.windstream.net
+ 166.102.165.121 166.102.165.0/24 AS7029 -
+ --- -
ip numbers of host
166.102.165.133
ptrs of ip numbers
mail.valornet.com
ip numbers using ptr to this host
166.102.165.133
hostnames pointing here by cname
mail.valornet.net
smtp.door.net