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Learn about the history, operations, and challenges of the USPS, an independent agency of the federal government that provides postal service in the U.S. and its territories. Find out how the USPS delivers mail and packages, operates its fleet, and faces financial and legal issues.
Learn about the 65-bar barcode for use on mail in the United States, which provides greater information and functionality than its predecessors. The barcode encodes up to 31 digits of mail-piece data, such as service type, mailer ID, sequence number, and delivery point ZIP code.
A ZIP Code is a system of postal codes used by the United States Postal Service to sort and deliver mail more efficiently. It consists of five digits, followed by an optional four-digit extension called ZIP+4.
Learn about the history, methods and technologies of tracking packages with barcodes, GPS and other systems. Find out how to query and report package status online or internally.
Informed Delivery is a service by the United States Postal Service that lets consumers see incoming mail and manage packages online or via email. Users can also interact with digital content from mailers, get tracking updates, and schedule redelivery.
Address Management System (AMS) is the USPS master database of deliverable addresses and a tool for address standardization and ZIP Code lookup. It is also a general term for managing street addressing.
Learn how to check the validity and deliverability of a physical mailing address in the US and the UK. Compare the methods, benefits and providers of postal address verification services.
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