Common questions about our ZIP code databases, software, API, and lookup tools.
Check your spam or junk folder first — automated emails are sometimes filtered. If you used a payment method that requires funds to clear (such as e-check), you'll receive your download once the payment clears.
If you haven't received anything within 1 business day, email us at [email protected] and we'll look into it right away.
All databases are available in three formats:
All formats are compatible with Microsoft Office and Open Office.
Yes — all of our databases, software, and API plans are licensed for both personal and commercial use. There are no restrictions on how you use the data within your own projects or applications.
Because our products are digital downloads, we generally do not offer refunds after the download link has been accessed. If you have a problem with your purchase, email [email protected] and we'll do our best to help.
The database contains only the Preferred City Name and ZIP code as officially designated by the USPS. It does not contain every city name that has ever existed, or alternate/vanity city names.
ZIP codes are constantly being added or deleted — some months have only a few changes while others have hundreds. We strive to keep data current but with the volume of changes, minor discrepancies can occur.
Database downloads are updated throughout the year to reflect USPS changes. Once you purchase, you receive the most current version at the time of download.
The ZIP Code API is updated automatically — you always get the latest data without needing to re-download anything.
Each tier includes progressively more data fields:
Most users choose Gold for the complete dataset. Compare all databases →
Yes — all databases include ZIP codes for all 50 US states plus Washington DC, Puerto Rico, US Virgin Islands, Guam, American Samoa, and APO/FPO military addresses.
The ZIP Code API gives you programmatic access to the complete ZIP code database via REST API. Instead of downloading a file, your app makes HTTP requests and gets JSON responses — perfect for web apps, mobile apps, and automated workflows.
Go to the API pricing page, choose a plan, enter your email, and your key is issued instantly. The free plan requires no credit card.
Yes — API subscriptions are month-to-month with no contracts. You can cancel anytime from the billing portal. Your key will continue to work until the end of the current billing period, then downgrade to the free tier.
API — best for apps and websites that need live lookups. Recurring monthly subscription. Always up to date. No file management.
Database download — best for offline use, bulk processing, or importing into your own database or spreadsheet. One-time purchase. You manage updates.
ZIP Code Software v3 is a Windows desktop application. It is not available for Mac or Linux.
Yes — ZIP Code Software v3 includes the Gold Edition database, which contains all ZIP codes with city, state, county, lat/lng, FIPS codes, timezone, and daylight saving data.
Yes — a free trial is available. Download the free trial (691KB). The trial has limited functionality; purchase the full version for complete access.