Applications/ Forms
05/12/2026
Emerging Roads Order Form

The USPS Emerging Roads™ order form is coming soon.

Data Files
05/11/2026
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
Data Files
05/11/2026
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
05/01/2026
April 2026 Nixie Volume

This spreadsheet contains the UAA statistics for April 2026.

Data Files
05/01/2026
ZIP Codes by Area and District codes

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

Publications
04/30/2026
Data Files
04/30/2026
USPS Ship Data Dictionary

Detailed information on the USPS Ship (Formerly Package Platform) data elements available through the Informed Visibility Mail Tracking & Reporting (IV-MTR) application. Please note that items in bold text were updated or added recently.

Release Notes
04/29/2026
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.

Fact Sheets
04/29/2026
Mailpiece Design Analyst (MDA) Customer Service Help Desk Brochure

An overview brochure for the MDA Customer Service Help Desk, including services, benefits, and contact information.

Release Notes
04/28/2026
User Guides
04/28/2026
Viewing MGI Credit Balances and Postage Statements

My Products Portal customers can view incentive credit balances and postage statements
associated with their account through the portal.

Technical Specifications
04/27/2026
Labeling List Changes Effective June 1, 2026

Effective June 1, 2026, the Postal Service™ will revise Labeling List(s) L007, L012, L014, L015, L016, L201, and L606 to reflect changes in mail processing operations. Mailers are expected to label according to these revised lists for mailings inducted on or after the June 1, 2026, effective date through July 31, 2026, expiration date. The changes will be published in the Postal Bulletin, Issue #22702.

Publications
04/27/2026