DNS resolution for dynamic dns domains

I want to know if this is possible: I have a subdomain in dynamic dns for e.g. abc.example.com that resolves at IP 123.45.67.8. Is there a way to have all subdomains of abc.example.com be also resolved at the dynamic IP address. For e.g. anyone going to test1.abc.example.com and xyz.abc.example.com and all others be directed to the same dynamic IP 123.45.67.8. Note: In my private server (at ip 123.45.67.8), I already have a dns service running that will do the resolution when requests comes in.