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Expressions by User

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Title Test Details Pattern Title
Expression
^(?(^00000(|-0000))|(\d{5}(|-\d{4})))$
Description
US zip code expression that disallows 00000 or 00000-0000 for either ZIP or ZIP+4. Great for web site validation.
Matches
12345 | 12345-6789
Non-Matches
00000 | 00000-0000 | a4650-465s
Author Rating: Not yet rated. Paul Duncan
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