About the Random Zip Code Generator
We built this tool to help developers, testers, and designers quickly generate realistic-looking US Zip Codes for their projects. Whether you're filling out a test database, creating mockups, or need placeholder data for a form, this tool makes it easy. You can generate a large number of codes at once and even filter them by state to get more specific data.
It is important to remember that while these zip codes are in a valid format and fall within real-world numerical ranges for each state, they are generated randomly. They are not guaranteed to correspond to actual, specific postal routes. Their purpose is to serve as realistic placeholder data.
How to Use This Tool
- Select a specific US state from the dropdown menu, or leave it as "Any State" to get zip codes from all over the country.
- Enter the "Quantity" of random zip codes you need (up to 5,000).
- Choose your preferred "Zip Code Format" (either the standard 5-digit code or the 9-digit ZIP+4).
- Click the "Generate Zip Codes" button to create your list.
- You can then copy the list to your clipboard or download it as a
.txtor.csvfile.
Frequently Asked Questions
Are these real zip codes?
The zip codes generated are random numbers that fall within the real, valid ranges for each US state. However, they are not pulled from a master list of active postal codes. This means that while a generated zip code like "90210" is real, another one might be a valid number within California's range but not correspond to an actual location. They are perfect for testing but should not be used for real mailings.
What is a ZIP+4 Code?
A ZIP+4 code is an extended 9-digit zip code. The first five digits are the standard zip code, indicating a general delivery area. The extra four digits identify a more specific location, like a city block, a group of apartments, or even a single high-volume mail receiver. Using the ZIP+4 format can help with more precise mail sorting.
How does the state filter work?
US Zip Codes are assigned to general geographic areas, with the first digit representing a group of states (e.g., 0 for the Northeast, 9 for the West Coast). We use a database of the minimum and maximum zip code numbers for each state to generate a random number that is guaranteed to fall within that state's range.
Why would I need random zip codes?
Random zip codes are very useful for a number of tasks. Developers need them to test address forms and databases. Designers use them as placeholder content in mockups. Data analysts might use them to populate sample datasets for testing queries and visualizations without using real personal information.