Data Files
08/21/2025
Z4 Info File

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

Data Files
08/21/2025
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
08/20/2025
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.

Data Files
08/19/2025
Informed Visibility® Mail Tracking & Reporting (IV®-MTR) Development Tracker

This document provides a list of active IV-MTR work to be as well as items completed in FY25.

 

*Please note, Postal Pro is the only source for a current IV-MTR Development log as updates will be made on an ongoing basis.

Data Files
08/18/2025
***Updated - New Areas*** - Area District 5-digit ZIP Codes (AREADIST_ZIP5.TXT)
Data Files
08/18/2025
City/State ZIP Code Weekly Compare
Data Files
08/18/2025
3 Digit ZIP/AISU Office List (AISUREPT.TXT)
Data Files
08/18/2025
AIS Congressional District File (CONG_DIST.TXT)
Data Files
08/18/2025
AIS County Name Table Layout (AISCNTY.TXT)
Data Files
08/18/2025
AMS County Name Table (COUNTY_NAME_TABLE.TXT)