Get instant, on-the-go access to USPS.com’s most popular tools with USPS Mobile. Find Post Offices™ and collection boxes nearby, look up ZIP Codes™, and track packages anywhere you go.
Find USPS Locations when you need to get to a Post Office, Automated Postal Center, or collection box. Get a list of the closest options and then plot your preferred choice on a map to get driving, walking, or transit directions. Or search for locations anywhere in the country.
Look up a ZIP Code™ for your current location. Or get the ZIP Code for any U.S. address.
Use our Track & Confirm tool to track your Express Mail® shipments and check the status of packages sent with other services. You can give your shipment a nickname and save it in the app, so you can easily keep tabs on your items until they’re delivered.