how to trace back DNS CNAME record based on GTM WIDE IP

From GTM, Is there anyway I can find out the CNAME configured on the DNS server based on the wideIP?

 

for example: on GTM, I have a wideIP on DNS, I have NS record for gtm.abc.com pointing to my GTM's listener as DNS delegation. so usually there is a CNAME record --> configured on DNS server.

 

So my question is: Without checking the DNS configure, just From GTM, is there any way I can find out which CNAME( here should be ) was configured on my DNS to point to

 

I couldnt think of a way to do so but someone told me this is possible by checking the zonerunner, anyone can enlighten me on this?

 

sincerely Thanks