Move to Competitive Street Addressing (MTC SA) List

This .txt file contains the MTC SA List.

DSF2® Licensees

This document contains a list of DSF^2® licensed providers with contact information.

DPV® Licensees

This document provides a contact list of licensees for DPV^®.

INFORMATIONAL - October Time-Limited Price Change 2026 PostalOne! Alert – September 20, 2026

INFORMATIONAL - October Time-Limited Price Change 2026 Commercial System Releases – September 20, 2026

INFORMATIONAL - UPDATE - Commercial System Releases – Week of September 12, 2026

Request to Lead or Participate - MTAC User Group and Work Group

Chief Retail & Delivery PCC Board Support Role

PCCAC Certification Webinar: Address Hygiene with Adam Collinson

INFORMATIONAL - 2027 National Postal Forum Registration Now Open

2027 National Postal Forum Registration Now Open

NCOALink® Limited Service Provider Licensees

This document provides a list of service providers and contact information for NCOA^Link®. These providers receive 18 months of change-of-address (COA) data on a weekly basis from the USPS^®. For the full 48 months of COA data refer to the NCOA^Link Full Service Provider Licensees.

DELIVERY - El Portal Post Office – Resume Operations

INFORMATIONAL - USPS APIs System Release Notification - September 16, 2026

Informed Visibility Mail Tracking & Reporting Machine Count

List of US Postal Service machines by site, including a description of each machine.

ZIP Codes by Area and District codes

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

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

INFORMATIONAL - USPS APIs System Patching Notification – September 5 and 6, 2026

DELIVERY - Big Sur Post Office – Resumes Operations

INFORMATIONAL - Commercial System Releases – Week of September 12, 2026

Enterprise Payment System (EPS) Release Notes-September 13, 2026

INFORMATIONAL - USPS APIs System Deployment – September 13, 2026

INFORMATIONAL - USPS APIs System Deployment [CR# TBD] – September 12, 2026

INFORMATIONAL - USPS APIs System Deployment – September 6, 2026

PROCESSING AND DISTRIBUTION - USPS Modernization Through Package Equipment Upgrades in September 2026