Data Files
07/02/2026
Undeliverable-as-Addressed (UAA) Statistics by Mailing Industry Quarterly Report (Q3 FY26)

ACS Nixie stats by industry for FY26 Q3.

Data Files
07/02/2026
Z4 Info File

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

Data Files
07/02/2026
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
07/01/2026
June 2026 Nixie Volume

This spreadsheet contains the UAA statistics for June 2026.

Data Files
07/01/2026
ZIP Codes by Area and District codes

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

Data Files
07/01/2026
Informed Delivery® Post-Campaign (IDPC) Data through IV-MTR® Data Dictionary

This document describes the Informed Delivery Post-Campaign (IDPC) data fields available through the IV-MTR application.

Data Files
06/30/2026
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
06/29/2026
***Updated - New Areas*** - Area District 5-digit ZIP Codes (AREADIST_ZIP5.TXT)
Data Files
06/29/2026
City/State ZIP Code Weekly Compare
Data Files
06/29/2026
3 Digit ZIP/AISU Office List (AISUREPT.TXT)