AISU ZIP Code Record and AISU Address Record Descriptions (AISULOUT.TXT)

AISU ZIP Code File (AISUZIPS.TXT)

AISU Contact Information (AISUADDR.TXT)

Area District Finance File Specification (AREA_DIST_LAYOUT.TXT)

Area District Finance File (AREADIST.TXT)

Area/District 3-digit and 5-digit ZIP Code Assignments (AREA_DIST_ZIP.TXT)

Move to Competitive Street Addressing (MTC SA) List

This .txt file contains the MTC SA List.

Business Acceptance Solutions & Major Mailer Support Directory

This document provides a contact list for Business Acceptance Solutions (formerly Business Mailer Support) & Major Mailer Support

Power-up your Public Speaking Skills with Chris Lien

PTR2 Release Notes_DD_06_13_26

DELIVERY - Commercial System Releases (June 20 – June 26)

DELIVERY - NC District Waco Post Office (28169) Temporarily Closed

DELIVERY - South Colton Post Office (13687) - Suspended Temporarily

INFORMATIONAL - USPS Occupancy Trends Product

INFORMATIONAL - USPS Population Mobility Trends Product

Informed Visibility® Mail Tracking & Reporting (IV®-MTR) Release Notes

These release notes summarize new features and enhancements implemented in deployments to the IV-MTR application.

INFORMATIONAL - Upcoming USPS.com Maintenance on July 11, 2026

INFORMATIONAL - July Price Change 2026 - Commercial System Releases June 28, 2026

INFORMATIONAL - Mailer ID (MID) Validation for Payments API June 22, 2026

DELIVERY - International Service Resumption Notice effective June 12, 2026

DELIVERY - Lone Rock Post Office (50559) - Suspended Temporarily

Atlantic AIM Presentation - June 3, 2026

Atlantic AIM Leadership 2026

INFORMATIONAL - New Mail.dat client for July 2026 Price Change June 28, 2026

INFORMATIONAL - USPS APIs System Release Notification June 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 LACS^Link®.

INFORMATIONAL: USPS APIs System Deployment [CR# TBD] - Saturday, June 27, 2026

INFORMATIONAL: USPS APIs System Deployment - Sunday, June 21, 2026

INFORMATIONAL: USPS APIs System Deployment - Sunday, June 7, 2026

PCCAC Marketing and Communications Newsletter May 2026 Edition

INFORMATIONAL - Commercial System Releases (June 11 – June 19)

DELIVERY - Clarkson Post Office (14430) - Suspended Temporarily

INFORMATIONAL - Reminder - Central Area AIM In-Person Meeting 2026 Invitation - JUNE 30th 2026

June 11 2026 USPS Ship R27.0.3.0 Release Notes

INFORMATIONAL - Commercial System Release - June 4, 2026

INFORMATIONAL - Major USPS Pricing Shifts July 2026 - What Mailers Need to Know

June 4 2026 USPS Ship R27.0.2.0 Release Notes

INFORMATIONAL - USPS Modernization Through Package Equipment Upgrades in June 2026

DELIVERY - Corte Madera Post Office - Temporarily Closed

PCC Events (June 2026)

IMpb/IMmb Electronic File Transmission Requirements

INFORMATIONAL - RESOLVED - Enterprise Payment System – Incident #10716992 Issues with Postage Statement Finalization, ACH Withdrawal Details Missing from Data Feeds

Occupancy Trends License Agreement

ZIP Codes by Area and District codes

The Excel spreadsheet lists ZIP Codes with the associated Area and District Codes.  

INFORMATIONAL - 2nd Reminder - USPS Enhanced Addresses API – Coming July 2026

INFORMATIONAL - Mail Spoken Here - May Issue

May 2026 Nixie Volume

This spreadsheet contains the UAA statistics for May 2026.

Automated Zone Indicator (AZI) Table

The AZI table lists each five-digit ZIP Code™ and is an indicator of the type of processing that typically takes place on letter mail destined for each ZIP Code. Each number in the file is a ZIP Code appended with a numeric zone indicator. The five numeric indicators are as follows:

1. Two Pass Zones: Automated two-step sector/segment at mail processing facilities
2. 876 Carrier Route Sort Zones: Automated incoming secondary carrier route sorting at plants
3. Carrier Route Barcode Sorter (CSBCS) Zones: Automated walk sequence sorting on CSBCS machines at delivery units
4. Delivery Barcode Sorter (DBCS) Zones: Automated walk sequence sorting on DBCS machines at plants [i.e., sectional center facilities (SCFs)] or at delivery units
5. Manual/Mechanized Zones: No automated sorting; no tracking code scans should be generated from facilities matched to these ZIP Codes

PCC Insider May 2026 Special Edition

INFORMATIONAL - Commercial System Releases (June 6 – June 12)