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

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: Scheduled Commercial Systems Activities - Price Change Release - Successfully Completed

July 2025 Release Notes

INFORMATIONAL: USPS APIs System Maintenance - June 30, 2025

DELIVERY: Atlantic Area - Maryland District - Oxford Post Office (21654) - Temporarily Closed

DELIVERY - Central Area – Ohio 1 District - Rogers Post Office - 44455

INFORMATIONAL - The MSSC Announces EVS Email Addresses Decommissioned

Labeling List Changes Effective August 1, 2025

Effective August 1, 2025, the Postal Service™ will revise Labeling List(s) L002, L004, L005, L007, L010, L012, L601, L605, and L606 to reflect changes in mail processing operations.

Enterprise Payment System IV-MTR Data Elements