US postcode & City Lookup Tool
Explore the quality and accuracy of our US postal data
Demo covers US data only. Full coverage available in 247+ countries via the Data Portal
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Access comprehensive location data including city, postcode, coordinates, population, timezones, and administrative regions.
United States postcode Format
US postcodes are five digits long (e.g., 90210). The first digit represents a group of states, generally assigned from northeast to west coast. The first three digits determine the central mail processing facility, called a sectional center facility (sec center), which sorts and distributes mail12. Each delivery point typically has a unique postcode, with the ZIP+4 system allowing even more precise location identification.
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We provide global companies with accurate location data and a team of geodata experts so they can operate efficiently across countries.
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Reliable and up-to-date postcode data even in difficult geographies such as China, the UK, Russia, or Brazil.
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Our data has a unified global structure. The file formats, column titles, attribute naming and data model are consistent across countries.
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Our pricing model depends on a few factors such as products, features, use case and country coverage.
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Annual licenses are priced based on the number of countries needed, type of usage, products and the features (additional datasets).
Our licenses have a fixed price and include everything: comprehensive location data, unlimited updates, the right to use our data in all your systems or products, and continuous support from a dedicated expert.
Data is updated weekly, but you can decide on your own update frequency depending on your use case. You can get automatic differential updates and a list of historical ID changes by using our download API.
Frequently Asked Questions
Does United States have postcodes?
Yes, the United States has 5-digit postal codes.
What postcode is 60653?
60653 is a US postcode located in Chicago, Illinois. This delivery area covers a section of the South Side of Chicago, specifically parts of the Bronzeville neighborhood.
What postcode is 10004?
10004 is a US postcode serving lower Manhattan in New York City, specifically covering parts of the Financial District. This delivery area includes prominent destinations like Battery Park and is distinctly different from postcodes in states like Alabama, Florida, or Ohio.
The last four digits that sometimes follow this postcode (10004-XXXX) help identify the specific street or building within this section of the city.
What is a valid U.S. postcode?
A valid U.S. postcode consists of five digits (and optionally, four additional digits separated by a hyphen). USPS uses these codes to deliver mail throughout the USA efficiently.
Unlike postal codes in some other countries, US postcodes do not contain letters. Every delivery area in all 50 states (including Kentucky, Massachusetts, Virginia, Vermont, Nevada, Kansas, Louisiana, Nebraska, New Hampshire, and Rhode Island) plus territories like American Samoa, the Federated States of Micronesia, and the District of Columbia has at least one assigned postcode to help find specific destinations.
What postcode is 23401?
23401 is a US postcode assigned to a delivery area in the eastern section of Virginia. Specifically, this number corresponds to Keller, a city on Virginia’s Eastern Shore region, part of the Delmarva Peninsula. This postcode is not associated with West Virginia or other states like Kentucky or Alabama.
What is the relationship between US postcodes and state boundaries?
US postcodes are five-digit numbers identifying specific delivery areas throughout the United States. While they generally follow state boundaries, there are interesting exceptions where postcodes serve communities across state lines.
For example, some residents near the West Virginia border might share a postcode with neighboring communities in Maryland or Virginia, depending on mail processing logistics.
When searching for information about a particular area, you always have the option to look up the official US postcode boundaries through the USPS website, which shows exactly which streets and addresses belong to each US postcode region.
How to find postcode in USA?
To find a postcode in the USA, you can use our free postcode lookup tool online. Simply enter your city and state in the search fields, and you’ll get results showing the valid postcode for your location. Many users find this simple method provides accurate postcode information quickly. Note that some areas may have two postcodes or additional information depending on the specific location.
How to look up full postcode?
A full postcode lookup requires entering complete address details in the search fields. Free postcode lookup services provide comprehensive results that include the standard 5-digit code plus the additional information of the 4-digit extension. Users can confirm their valid postcode by reviewing all applicable results on the page. This version of postcode information helps individuals get precise postal data for their needs.
Where is postcode 999077?
postcode 99907 is a valid postcode located in Ketchikan, Alaska, USA. Note that postcode 999077 with the extra digit appears to be an error. Users should confirm the correct version through a free postcode lookup to get accurate postcode information. The page results will show the proper city and state, plus any additional information about the applicable area and distance from other locations.
How do I find the postcode of my location?
To find your location’s postcode, use a free postcode lookup service where you enter your city and state in the simple search fields. The results page will display your valid postcode along with additional information. Users can confirm their postcode matches their location, and note that some areas may have two postcodes depending on income levels or specific districts. These links provide postcode information that individuals can trust for accurate postal data.
What additional information can I get from a USA postcode lookup?
Beyond the basic postcode, lookup tools often provide comprehensive location data including:
City and state information
Geographic coordinates (latitude and longitude)
Population statistics
Time zone information
Administrative regions
How accurate are online USA postcode lookup tools?
Quality USA postcode lookup services maintain high accuracy through:
Weekly data updates
Integration of multiple reliable sources
Advanced data cleaning and validation processes
Continuous monitoring for changes and correction
