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Delaware — United States

Welcome to the postal codes directory for Delaware, United States. As a prominent region in United States, Delaware contains 57 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.

57 Total Cities Indexed
DELAWARE Region Code
🔍 Showing 57 cities

Cities

57
Bear Bethany Beach Bethel Bridgeville Camden Wyoming Cheswold Claymont Clayton Dagsboro Delaware City Delmar Dover Dover Afb Ellendale Felton Fenwick Island Frankford Frederica Georgetown Greenwood Harbeson Harrington Hartly Hockessin Houston Kenton Kirkwood Laurel Lewes Lincoln Little Creek Magnolia Marydel Middletown Milford Millsboro Millville Milton Montchanin Nassau New Castle Newark Ocean View Odessa Port Penn Rehoboth Beach Rockland Saint Georges Seaford Selbyville Smyrna Townsend Viola Wilmington Winterthur Woodside Yorklyn

Frequently Asked Questions

Regional Divisions & Cities
Delaware encompasses diverse geographical zones and municipal areas. This platform indexes 57 major cities in Delaware, linking each city to its postal codes, neighborhoods, and regional phone area codes.
State-Level Telecom Infrastructure
Under the NANP system, Delaware 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 Delaware?
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.
What is the purpose of the zip code database and simulated phone generator for Delaware?
The database compiles all major cities and postal districts within Delaware. The tools allow developers and QA testers to generate format-compliant phone numbers to verify web forms, check localization rules, and test regional validation logic.
Are the phone numbers generated for Delaware active and real?
No, all numbers generated are simulated. They use the correct country prefix and the local area codes assigned to Delaware, but the subscriber numbers are randomly generated for software validation purposes. They cannot make or receive calls, nor can they receive SMS verification codes.
How frequently is the postal code data for Delaware updated?
Our database is regularly synced with official postal updates and open-source registry databases. While we strive to maintain high accuracy for development and testing purposes, you should always check the official national postal service for critical mailing validation.