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

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.

Undeliverable-as-Addressed (UAA) Statistics by Mailing Industry Quarterly Report (Q2 FY25)

ACS Nixie stats by industry for FY25 Q2.

March 2025 Nixie Volume

This spreadsheet contains the UAA statistics for March 2025.

ZIP Codes by Area and District codes

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

NCOALink® Statistics

This spreadsheet includes NCOALink statistics from 2007-2024 by licensee type.

February 2025 Nixie Volume

This spreadsheet contains the UAA statistics for February 2025.

Priority Mail Service Standards Exceptions FY2025 Q2

The file attached is compressed. This spreadsheet details Priority Mail Service Standards Exceptions for Q2 FY2025. To download a version of this file with headers, please click here.

Originating Service Standards FY2025 Q2

This spreadsheet details originating service standards for Q2 FY2025. The file attached is compressed. To download a version of this file with headers, please click here.

Priority Mail Service Standards Exceptions FY2025 Q2 with Headers

The file attached is compressed. This spreadsheet details Priority Mail Service Standards Exceptions for Q2 FY2025. To download a version of this file without headers, please click here.