Announcements
08/10/2026
INFORMATIONAL - Commercial System Releases – Week of August 15, 2026
Announcements
08/10/2026
INFORMATIONAL - PostalOne! Release – August 16, 2026
Release Notes
08/10/2026
August 9, 2026 Program Registration R31.1.0.0 Release Notes
Release Notes
08/10/2026
August 9, 2026 eSAS R47.2.0.0 Release Notes
Release Notes
08/10/2026
August 16, 2026 PostalOne! and USPS Ship Release
Data Files
08/10/2026
***Updated - New Areas*** - Area District 5-digit ZIP Codes (AREADIST_ZIP5.TXT)
Data Files
08/10/2026
City/State ZIP Code Weekly Compare
Data Files
08/10/2026
3 Digit ZIP/AISU Office List (AISUREPT.TXT)
Data Files
08/10/2026
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
08/10/2026
AIS Congressional District File (CONG_DIST.TXT)
Data Files
08/10/2026
AIS County Name Table Layout (AISCNTY.TXT)
Data Files
08/10/2026
AMS County Name Table (COUNTY_NAME_TABLE.TXT)
Data Files
08/10/2026
AMS Address Report: AISU Mailing List (ADDRREPT.TXT)
Data Files
08/10/2026
AISU ZIP Code Record and AISU Address Record Descriptions (AISULOUT.TXT)
Data Files
08/10/2026
AISU ZIP Code File (AISUZIPS.TXT)
Data Files
08/10/2026
AISU Contact Information (AISUADDR.TXT)
Data Files
08/10/2026
Area District Finance File Specification (AREA_DIST_LAYOUT.TXT)
Data Files
08/10/2026
Area District Finance File (AREADIST.TXT)
Data Files
08/10/2026
Area/District 3-digit and 5-digit ZIP Code Assignments (AREA_DIST_ZIP.TXT)
Data Files
08/10/2026
Move to Competitive Street Addressing (MTC SA) List

This .txt file contains the MTC SA List.

Announcements
08/07/2026
INFORMATIONAL - USPS APIs System Deployment [CR# TBD] - August 22, 2026
Announcements
08/07/2026
INFORMATIONAL - Commercial System Releases – August 9, 2026
Announcements
08/07/2026
DELIVERY - COS COB Post Office (06807) - Temporarily Closed
Announcements
08/07/2026
INFORMATIONAL - USPS.com Maintenance on August 22, 2026 CANCELLED
Announcements
08/06/2026
DELIVERY - Inchelium, WA 99138-Resume Operations (08-06-2026)