Regex Cheatsheet - Regular Expression Quick Reference
Quick reference for regular expression patterns. Character classes, quantifiers, anchors, and common patterns.
Postal/ZIP Code Pattern
Common PatternMatch US ZIP code (5 digits or ZIP+4 format)
Pattern
^\d{5}(-\d{4})?$Examples
100015-digit ZIP
Matches: 10001
12345-6789ZIP+4 format
Matches: 12345-6789
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