Announcements
06/10/2025
INFORMATIONAL: USPS APIs System Maintenance
Announcements
06/10/2025
INFORMATIONAL: Commercial Systems Releases - June 15, 2025
Release Notes
06/10/2025
Priority Mail Next Day/Post Host Release Overview
Release Notes
06/10/2025
USPS APIs Release Notes

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

Announcements
06/09/2025
PCCAC Communications and Marketing – Newsletter
Announcements
06/09/2025
PTR Modernization

PTR is being modernized to deliver a best-in-class visibility solution for customers. The new solution, PTR 2, will provide a scalable and highly available platform to support continued package volume growth and evolving business functionality to deliver exceptional customer value.

Data Files
06/09/2025
***Updated - New Areas*** - Area District 5-digit ZIP Codes (AREADIST_ZIP5.TXT)
Data Files
06/09/2025
City/State ZIP Code Weekly Compare
Data Files
06/09/2025
3 Digit ZIP/AISU Office List (AISUREPT.TXT)
Data Files
06/09/2025
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®.