go
m.ca-servers.ca point to 156.154.102.4.

m.ca-servers.ca
a records
 
+ 156.154.102.4 156.154.102.0/24 AS12008 -
+ --- -
ip numbers of host
156.154.102.4
ptrs of ip numbers
m.ca-servers.ca
hostnames sharing ip with a-records
m.ca-servers.ca
domains using this as nameserver
ca