The United States Postal Service (USPS) is an independent agency of the U.S. federal government responsible for providing postal services across the United States. Established in 1775, USPS has evolved into a modern and efficient postal system, delivering mail and packages to nearly 169 million addresses nationwide .

USPS offers a wide range of services, including:

First-Class Mail®: For postcards, letters, large envelopes, and small packages.

Priority Mail®: Fast domestic service with delivery in 1-3 business days.

Priority Mail Express®: Overnight delivery service with money-back guarantee.

USPS Ground Advantage™: Reliable and economical ground shipping option.

Media Mail®: Cost-effective service for shipping books and media materials.

International Services: Including Global Express Guaranteed®, Priority Mail International®, and First-Class Package International Service®.

USPS tracking numbers typically consist of 20 to 22 digits for domestic shipments, while international tracking numbers follow the S10 format, starting with two letters, followed by nine digits, and ending with two letters (e.g., RR123456789US).

To track your USPS shipment, enter the tracking number on the official USPS Tracking page. The system provides real-time updates on the package's location and delivery status.

For international deliveries, USPS collaborates with postal operators worldwide, such as Canada Post, Royal Mail, and Australia Post, ensuring seamless cross-border shipping.

USPS also offers additional services like PO Box rentals, money orders, and passport application processing. With a commitment to innovation and customer service, USPS continues to adapt to the evolving needs of its customers.