Data Files
09/02/2025
AISU Contact Information (AISUADDR.TXT)
Data Files
09/02/2025
Area District Finance File Specification (AREA_DIST_LAYOUT.TXT)
Data Files
09/02/2025
Area District Finance File (AREADIST.TXT)
Data Files
09/02/2025
Area/District 3-digit and 5-digit ZIP Code Assignments (AREA_DIST_ZIP.TXT)
Data Files
09/02/2025
Move to Competitive Street Addressing (MTC SA) List

This .txt file contains the MTC SA List.

Data Files
09/02/2025
Pending Route Adjustment File

This Excel sheet details route adjustments for August 2025 thru October 2025.

Data Files
08/28/2025
Z4 Info File

A downloadable ZIP file containing information related to the Z4 Info File

Data Files
08/28/2025
Early Warning System (EWS002C0.ZIP)

This file is the EWS production file and is updated weekly. This file contains the Early Warning System data file for the CASS™ and MASS™ certification process.

 

Data Files
08/26/2025
Mail Quality Data through IV®-MTR Data Dictionary
Data Files
08/20/2025
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.