INFORMATIONAL - Federal Register Manifest Mailing System Retired

PCC Alert-News You Need to Know from MTAC-February 2026

USPS Ship Webinar Census and Monthly Assessments

ZIP Codes by Area and District codes

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

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.

January 2026 Nixie Volume

This spreadsheet contains the UAA statistics for January 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

NCOALink® Full Service Provider Licensees

This document contains information about NCOA^Link® Full Service Provider Licensees. These service providers receive 48 months of change-of-address (COA) data from the USPS^® on a weekly basis.

NCOALink® Certified Software Developers

This document contains contact information for NCOA^Link® Certified Software Developers.

NCOALink® Licensed Interface Distributors

This document contains contact information for NCOA^Link® Licensed Interface Distributors.