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Washington — United States

Welcome to the postal codes directory for Washington, United States. As a prominent region in United States, Washington contains 14 major cities indexed. Our platform provides comprehensive zip codes, neighborhood directories, and simulated local phone number generation rules for developer form testing and compliance verification.

14 Total Cities Indexed
WASHINGTON Region Code
🔍 Showing 14 cities

Available Cities

14
Aberdeen Bellevue Bridgeport Burlington Davenport Lincoln Manchester Mesa Paterson Rochester Rockford Seattle Spokane Tacoma

Frequently Asked Questions

Regional Divisions & Cities
Washington encompasses diverse geographical zones and municipal areas. This platform indexes 14 major cities in Washington, linking each city to its postal codes, neighborhoods, and regional phone area codes.
State-Level Telecom Infrastructure
Under the NANP system, Washington is allocated several distinct area codes covering specific counties and metropolitan districts. Select a city to explore local dialing overlays and to generate valid mock phone patterns.
How to look up the exact postal code for a specific district or street under Washington?
You can select the corresponding city from the list above. On the city page, we provide a complete mapping table of districts, streets/neighborhoods, and their exact postal codes. You can also use the search bar at the top to instantly locate a street or neighborhood.