Data Files
08/25/2025
AISU Contact Information (AISUADDR.TXT)
Data Files
08/25/2025
Area District Finance File Specification (AREA_DIST_LAYOUT.TXT)
Data Files
08/25/2025
Area District Finance File (AREADIST.TXT)
Data Files
08/25/2025
Area/District 3-digit and 5-digit ZIP Code Assignments (AREA_DIST_ZIP.TXT)
Data Files
08/25/2025
Move to Competitive Street Addressing (MTC SA) List

This .txt file contains the MTC SA List.

Data Files
08/25/2025
Pending Route Adjustment File

This Excel sheet details route adjustments for August 2025 thru September 2025.

Release Notes
08/24/2025
August 24 2025 Release Notes
Announcements
08/22/2025
INFORMATIONAL - USPS APIs Redirect from On-Prem to Cloud
Announcements
08/22/2025
INFOMATIONAL - Priority Mail Open and Distribute (PMOD) Service Updated
Announcements
08/22/2025
PROCESSING AND DISTRIBUTION - Postal Service Addressing Service Delays in the Chicago