Announcements
12/08/2025
INFORMATIONAL - USPS Mail Flow 101 Webinar Dec 16, 2025
Announcements
12/08/2025
INFORMATIONAL - Tracking Access Validation Notification
Announcements
12/08/2025
INFORMATIONAL - Final Update - USPS Ship INCIDENT # 10234251 PEW Data Feed Now Current
Release Notes
12/08/2025
Tracking API Access Control Changes Release Overview
Announcements
12/08/2025
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.

Announcements
12/08/2025
PAVE™ 2026 Advisory Cycle S Extension

This advisory is to inform you that there will be no PAVE Cycle S/MAC Batch Certification testing for the 2026 Price Change releases. USPS has decided to extend the current PAVE process until January 19, 2027, and will not be testing or accepting files for testing during the transition into 2026.

Data Files
12/08/2025
***Updated - New Areas*** - Area District 5-digit ZIP Codes (AREADIST_ZIP5.TXT)
Data Files
12/08/2025
City/State ZIP Code Weekly Compare
Data Files
12/08/2025
3 Digit ZIP/AISU Office List (AISUREPT.TXT)
Data Files
12/08/2025
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®.