Data Files
11/02/2026
AISU ZIP Code Record and AISU Address Record Descriptions (AISULOUT.TXT)
Data Files
11/02/2026
AISU ZIP Code File (AISUZIPS.TXT)
Data Files
11/02/2026
AISU Contact Information (AISUADDR.TXT)
Data Files
11/02/2026
Area District Finance File Specification (AREA_DIST_LAYOUT.TXT)
Data Files
11/02/2026
Area District Finance File (AREADIST.TXT)
Data Files
11/02/2026
Area/District 3-digit and 5-digit ZIP Code Assignments (AREA_DIST_ZIP.TXT)
Data Files
11/02/2026
Move to Competitive Street Addressing (MTC SA) List

This .txt file contains the MTC SA List.

Data Files
10/29/2026
Z4 Info File

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

Data Files
10/29/2026
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
10/28/2026
Informed Visibility® Mail Tracking & Reporting (IV®-MTR) Operation Codes List

This spreadsheet provides a list of operation codes (opcodes), also known as Scan Event Codes, for the IV-MTR application.