USPS Package Tracking
Track Your USPS Package
About USPS
The United States Postal Service (USPS) is an independent agency of the executive branch of the United States federal government responsible for providing postal service across all 50 states, U.S. territories, and military bases worldwide. Founded in 1775, USPS delivers to over 163 million addresses and operates the largest retail network in the country with more than 31,000 facilities. As a self-funded agency, USPS receives no federal tax dollars for operating expenses and relies on the sale of postage, products, and services. Employing approximately 640,000 workers, it processes and delivers billions of mail pieces annually. Core services include First-Class Mail, Marketing Mail, Periodicals, Package Services, Priority Mail, Priority Mail Express, Ground Advantage, and international shipping. USPS also offers value-added services such as Certified Mail, Registered Mail, Signature Confirmation, Return Receipt, Informed Delivery, PO Boxes, money orders, passport applications, and Click-N-Ship online label printing.
Tracking Number Format
USPS tracking numbers vary by service type. The most common formats include: - **20-22 digit numbers** (e.g., 9400111899223033005011): Used for Priority Mail, Priority Mail Express, Ground Advantage, and most package services. Priority Mail typically uses 22 digits, Certified Mail uses 20 digits. - **92xxxxx format**: 22 digits starting with 92, common for USPS Ground Advantage. - **94xxxxx format**: 22 digits starting with 94, widely used for Priority Mail and commercial packages. - **93xxxxx format**: 22 digits starting with 93, often used for Priority Mail Express. - **1Z xxx xxx xx xxx xxx xxx**: 18-character alphanumeric format starting with "1Z", used for USPS partnerships with UPS Mail Innovations. - **EC/CP numbers**: Two letters followed by 9 digits and "US" (e.g., EC123456789US), used for Priority Mail Express International and Priority Mail International. - **RR/RA/RV numbers**: Two letters followed by 9 digits and "US" (e.g., RR123456789US), used for Registered Mail and Return Receipt. - **V numbers**: Starting with "V", used for Certified Mail. - **Intelligent Mail Barcode (IMb)**: Used for First-Class Mail letters and flats; tracking only available through commercial platforms, not on USPS.com. Tip: If your tracking number is not recognized, wait 24-48 hours after shipping for the first scan to appear.
How to Track Your USPS Package
- Find your tracking number from your shipping confirmation email, receipt, or the sender.
- Enter the tracking number in the search box above.
- Complete the verification and click "Track" to get instant results.
- View real-time status updates, transit history, and estimated delivery time.
- If tracking shows no results, wait a few hours as the carrier may not have scanned the package yet.
USPS — Frequently Asked Questions
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