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.

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

March 1 2026 Release Notes

INFORMATIONAL - PME Guarantee Suspension and Shipping Delays

INFORMATIONAL: Mail Spoken Here - February Issue

INFORMATIONAL - USPS Addressing API Major Enhancements Coming July 2026

INFORMATIONAL - USPS Ship (Package Platform) - INCIDENT 10424647 USPS Ship January and February Manifest Processing Delay

INFORMATIONAL - USPS APIs System Maintenance March 11, 2026

PCC Insider February 2026 Edition

Undeliverable-as-Addressed (UAA) Mail Roll-Up 1998-2025