Data Files
05/28/2026
Occupancy Trends ZIP Code Vacant File (TXT) Sample File
Tech Guides
05/28/2026
Occupancy Trends Technical Guide
Applications/ Forms
05/28/2026
USPS Population Mobility Trends License Agreement (Sample Only)
Technical Specifications
05/28/2026
Population Mobility Trends Technical Guide
Data Files
05/28/2026
Population Mobility Trends Summary (CSV) Sample File
Data Files
05/28/2026
Population Mobility Trends 48-Month Historical (CSV) Sample File
Data Files
05/28/2026
Z4 Info File

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

Data Files
05/28/2026
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.

 

Release Notes
05/27/2026
PTR2 Release Notes_DD_05_28_26
Announcements
05/27/2026
INFORMATIONAL - Commercial System Releases (May 30 – June 5)