DNS Question

[robertlaferla at attbi.com (Robert La Ferla)]

Is there a way to specify a default IP address for hosts in a domain 
that are not specifically listed in DNS?

e.g.

Assume I have three hosts in DNS:

first.mydomain.com        192.0.0.1
second.mydomain.com    192.0.0.2
third.mydomain.com    192.0.0.3

Now, if none of these match, I'd like any other host under mydomain.com 
to resolve to 192.0.0.1:

so "random.mydomain.com" or "qwerty.mydomain.com" which aren't listed 
specifically will get the default IP of 192.0.0.1.

Is this possible?  How?

Thanks,
Robert