Beyond the Mail

A suite of additional new addressing & geospatial data products is available to customers with expanded use cases, now including USPS Emerging Roads and USPS ZIP Code Boundaries!  Coming Soon: USPS Geocoding API.

Z4 Info File

A downloadable ZIP file containing information related to the Z4 Info File

Early Warning System (EWS002C0.ZIP)

This file is the EWS production file and is updated weekly. This file contains the Early Warning System data file for the CASS™ and MASS™ certification process.

INFORMATIONAL - USPS APIs System Release Notification - October 14, 2026

INFORMATIONAL - USPS Expands Addressing and Geospatial Data Offerings

DELIVERY - International Resumption of Mail Service - Effective October 2, 2026

INFORMATIONAL - Mail Spoken Here - September Issue

Provisioning EMAS API Invoices Data in Informed Visibility® Mail Tracking & Reporting (IV®-MTR)

This guide provides instructions for receiving EMAS API Invoices data through the IV Mail Tracking & Reporting application.

USPS APIs Release Notes

For the latest updates, please review the USPS APIs Release Notes.

INFORMATIONAL: REMINDER: Electronic Verification System (eVS) Retirement

PROCESSING AND DISTRIBUTION: Eastern Processing Region - Birmingham, AL - Regional Processing and Distribution Center (RPDC)

Shape the Future of the PCC Network – Applications Open October 1

January 2027 Release Overview

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 the current fiscal year.

*Please note, Postal Pro is the only source for a current IV-MTR Development log as updates will be made on an ongoing basis.

INFORMATIONAL - Removal of the Dangerous Goods Check Box on Customs Forms

INFORMATIONAL - Executive Retirement - Margaret Pepe

INFORMATIONAL - October 12, 2026, Columbus Day Holiday Recommendations on Live Animal Shipping

Labeling List Changes Effective November 1, 2026

Effective November 1, 2026, the Postal Service™ will revise Labeling List(s) L001, L007, L012, 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 November 1, 2026, effective date through December 31, 2026, expiration date. The changes will be published in the Postal Bulletin, Issue #22713.

***Updated - New Areas*** - Area District 5-digit ZIP Codes (AREADIST_ZIP5.TXT)

USPS Ship Data Dictionary

Detailed information on the USPS Ship (Formerly Package Platform) data elements available through the Informed Visibility Mail Tracking & Reporting (IV-MTR) application. Please note that items in bold text were updated or added recently.

City/State ZIP Code Weekly Compare

3 Digit ZIP/AISU Office List (AISUREPT.TXT)

AIS Congressional District File (CONG_DIST.TXT)

AIS County Name Table Layout (AISCNTY.TXT)

AMS County Name Table (COUNTY_NAME_TABLE.TXT)