Are these real ZIP codes?

They are valid five-digit formats but random, so do not rely on them for mail.

The optional four digits pin a address more precisely; turn it on if you need it.

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Random ZIP Code Generator

Generate US ZIP codes, with optional +4 extensions, for test data. Free, no signup.

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How many

Include +4Include +4

RESULT

Are these real ZIP codes?: They are valid five-digit formats but random, so do not rely on them for mail.
What is the +4 part?: The optional four digits pin a address more precisely; turn it on if you need it.