Data Files
01/06/2026
Undeliverable-as-Addressed (UAA) Mail Roll-Up 1998-2025

This spreadsheet provides a breakdown of Total UAA mail by mail class from FY1998 thru FY2025.

Data Files
01/06/2026
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.

Contact Lists
01/05/2026
Speakers Bureau List 6.0 - 12.18.25
Announcements
01/05/2026
INFORMATIONAL: Update - January Price Change 2026 - Commercial System Releases
Announcements
01/04/2026
COMPLETED - January Price Change 2026 - Commercial System Releases
Release Notes
01/04/2026
January 4 2026 Release Notes
Announcements
01/02/2026
INFORMATIONAL – Officer Announcement – Jason DeChambeau as Acting Vice President of Processing Operations
Data Files
01/02/2026
Undeliverable-as-Addressed (UAA) Statistics by Mailing Industry Quarterly Report (Q1 FY26)

ACS Nixie stats by industry for FY26 Q1.

Data Files
01/02/2026
December 2025 Nixie Volume

This spreadsheet contains the UAA statistics for December 2025.

Tech Guides
01/02/2026
Labeling Lists Technical Guide

The Labeling Lists data product assists mailers with presorting mail. It provides active, originating 3- and 5-digit ZIP Code™ data along with their destination locations [including city/state/ZIP Code] for labeling purposes. The product contains complete data files of each list found online via Postal Explorer® at https://pe.usps.com. Updates to the Labeling Lists are also published in the Postal Bulletin.