04/01/2026
Informed Visibility® Mail Tracking & Reporting (IV®-MTR) Development Tracker
This document provides a list of active IV-MTR work to be as well as items completed in FY25.
*Please note, Postal Pro is the only source for a current IV-MTR Development log as updates will be made on an ongoing basis.
04/01/2026
USPS APIs Release Notes
For the latest updates, please review the USPS APIs Release Notes.
04/01/2026
ZIP Codes by Area and District codes
The Excel spreadsheet lists ZIP Codes with the associated Area and District Codes.
03/31/2026
03/31/2026
03/31/2026
03/31/2026
03/31/2026
03/30/2026
03/30/2026
USPS APIs Terms and Conditions
ACKNOWLEDGEMENT AND ACCEPTANCE. Read this carefully before registering to use the USPS API services. By utilizing the APIs, you hereby ACCEPT ALL of the terms and conditions of this Agreement.
03/30/2026
03/30/2026
03/30/2026
03/30/2026
03/30/2026
03/30/2026
03/30/2026
03/30/2026
03/30/2026
03/30/2026
03/30/2026
03/30/2026
03/30/2026
03/30/2026
03/30/2026
Move to Competitive Street Addressing (MTC SA) List
This .txt file contains the MTC SA List.
03/29/2026
03/27/2026
03/27/2026
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03/27/2026
Labeling List Changes Effective May 1, 2026
Effective May 1, 2026, the Postal Service™ will revise Labeling List(s) L007, L012, L014, L016, L051, L201, and L606 to reflect changes in mail processing operations. Mailers are expected to label according to these revised lists for mailings inducted on or after the May 1, 2026, effective date through June 30, 2026, expiration date. The changes will be published in the Postal Bulletin, Issue #22700.
03/26/2026
03/26/2026
03/25/2026
03/25/2026
Beyond the Mail
Turn USPS’s unmatched doorstep reach into smarter decisions with Beyond the Mail—powered by USPS Post Office and Collection Box Data, USPS Occupancy Trends, and USPS Population Mobility Trends for sharper planning across real estate, retail, logistics, and more.
03/25/2026
03/25/2026
03/25/2026
Informed Visibility® Mail Tracking & Reporting (IV®-MTR) Release Notes
These release notes summarize new features and enhancements implemented in deployments to the IV-MTR application.
03/24/2026
Tracking Access Control Tech Sheet
Package Tracking allows seamless integration of real-time tracking information into business systems, enabling monitoring of USPS package status from shipment to delivery. USPS is upgrading tracking data access to enhance security and combat fraud by modernizing and securing customer access.
03/24/2026
Enterprise Payment System (EPS) FAQs
The Enterprise Payment System or EPS allows customers to pay for products and services through an Enterprise Payment Account (EPA) funded as an Automated Clearing House (ACH) Debit or Trust Account. The EPS payment account management provides enhanced security features, centralized balance and account management, and a self-service customer experience.
03/23/2026
03/23/2026
03/20/2026
03/20/2026
03/20/2026
03/20/2026
03/19/2026
03/19/2026
03/19/2026
03/19/2026
July 2026 Release Overview
Note: For the latest technical specifications, please see the July 2026 Price Change Release Notes as they are published. Mail.dat and Mail.XML updates required for this release.
03/18/2026