Data Files
10/30/2025
Z4 Info File

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

Data Files
10/30/2025
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
10/27/2025
***Updated - New Areas*** - Area District 5-digit ZIP Codes (AREADIST_ZIP5.TXT)
Data Files
10/27/2025
City/State ZIP Code Weekly Compare
Data Files
10/27/2025
3 Digit ZIP/AISU Office List (AISUREPT.TXT)
Data Files
10/27/2025
AIS Congressional District File (CONG_DIST.TXT)
Data Files
10/27/2025
AIS County Name Table Layout (AISCNTY.TXT)
Data Files
10/27/2025
AMS County Name Table (COUNTY_NAME_TABLE.TXT)
Data Files
10/27/2025
AMS Address Report: AISU Mailing List (ADDRREPT.TXT)
Data Files
10/27/2025
AISU ZIP Code Record and AISU Address Record Descriptions (AISULOUT.TXT)