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
***Updated - New Areas*** - Area District 5-digit ZIP Codes (AREADIST_ZIP5.TXT)
Data Files
01/12/2026
City/State ZIP Code Weekly Compare
Data Files
01/12/2026
3 Digit ZIP/AISU Office List (AISUREPT.TXT)
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®.

Data Files
01/12/2026
AIS Congressional District File (CONG_DIST.TXT)
Data Files
01/12/2026
AIS County Name Table Layout (AISCNTY.TXT)