[mso] access query question

I have a database with about 3100 addresses in it. I have queried out three 
zip codes. Now I need to query out the rest without those three showing . I 
have a few blanks so I start with Is null, but don't know what to use to not 
get those other three zip codes.
Any help would be appreciated.

Rocky Fithian K2LN
If God doesn't seem near, who moved?
Click the link below for my web pages.
http://web.sccoast.net/users/rockyfit/WebPageLinks.htm
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