go
mx.relay.orange-business.com are subdomains to this hostname. orange-business.com is a domain controlled by two nameservers at oleane.net. They are on the same IP network. Incoming mail for orange-business.com is handled by one mailserver at mailbox.orange-business.com. orange-business.com has one IP number.

orange-business.com
a records
 
+ 213.56.188.149 213.56.0.0/16 AS3215  
+ ---  
ns-soa records
ns4.oleane.net
+ 194.2.0.4 194.2.0.0/15 AS3215 -
+ --- -
ns records
ns4.oleane.net
+ 194.2.0.4 194.2.0.0/15 AS3215 -
+ --- -
ns5.oleane.net
+ 194.2.0.5 194.2.0.0/15 AS3215 -
mx records
mx.mailbox.orange-business.com
+ 194.2.0.80 194.2.0.0/15 AS3215 mx.fr.oleane.com
+ --- mx.fr.oleane.com
subdomains
mx.relay.orange-business.com