go
snrt-mail2.snrt.ma has one IP number , but the reverse is snrt-mail.snrt.ma. srv2-snrt.ma point to the same IP. snrt.ma use this as a mailserver. snrt.ma is a domain controlled by one nameserver at snrt.ma themselves. Incoming mail for snrt.ma is handled by four mailservers also at snrt.ma. Two of them are on the same IP network. snrt.ma has one IP number. snrt-mail2.snrt.ma is hosted on a server in Morocco.

snrt-mail2.snrt.ma
a records
 
+ 196.217.244.107 196.217.240.0/20 AS6713 snrt-mail.snrt.ma
+ --- snrt-mail.snrt.ma

snrt.ma
a records
 
+ 194.204.226.33 194.204.192.0/18 AS6713  
+ ---  
ns-soa records
 
+   AS?  
+ ---  
ns records
dns.snrt.ma
+ 194.204.226.33 194.204.192.0/18 AS6713  
+ ---  
mx records
snrt-mail2.snrt.ma
+ 196.217.244.107 196.217.240.0/20 AS6713 snrt-mail.snrt.ma
+ --- snrt-mail.snrt.ma
snrt-mail3.snrt.ma
+ 196.12.218.150 196.12.192.0/19 AS36884 wana-150-218-12-196.wanamaroc.com
+ --- wana-150-218-12-196.wanamaroc.com
snrt-mail4.snrt.ma
+ 196.217.244.108 196.217.240.0/20 AS6713 static196-108-244-217-196.adsl196-16.iam.net.ma
+ --- static196-108-244-217-196.adsl196-16.iam.net.ma
snrt-mail1.snrt.ma
+ 194.204.226.35 194.204.192.0/18 AS6713  
+ ---  
ip numbers of host
196.217.244.107
ptrs of ip numbers
snrt-mail.snrt.ma
hostnames sharing ip with a-records
srv2-snrt.ma
domains using this as mailserver
snrt.ma