Announcements
01/12/2026
DELIVERY: WestPac Area – Washington District – Stehekin Post Office – Resume Operations.
Announcements
01/12/2026
DELIVERY - Elba Post Office (14058) – Suspended Temporarily
User Guides
01/12/2026
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.

Announcements
01/12/2026
INFORMATIONAL - USPS Returns Package Quality Noncompliance Assessments
Data Files
01/12/2026
Cumulative Listing of ZIP Codes Covered by the LACS Database

This document provides a cumulative listing of ZIP Codes covered by the LACS database for LACSLink®.

Announcements
01/11/2026
DELIVERY: Southern Area - Texas 3 District -Stanton Post Office (79782) - Operations Temporarily Suspended
Announcements
01/09/2026
DELIVERY - Hewitt Post Office (07421) - Temporarily Closed
Tech Guides
01/09/2026
2026 Promotions Calendar and Technical Guide
Announcements
01/08/2026
Earn a Free Professional Development Certification From the PCCAC
Release Notes
01/08/2026
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.