mpn.dynuddns.com ....is registering and running on my Synology NAS.

I have Several Applications that run on that NAS and would need to have

.dynuddns.com as the Extension...such as example.dynuddns.com

So is there a way to have a RECORD created for this purpose for me...just a single RECORD that i could then CNAME/POINT to??

Please advise....if possible.....

Thanks.............