Data Files
02/23/2026
AISU Contact Information (AISUADDR.TXT)
Data Files
02/23/2026
Area District Finance File Specification (AREA_DIST_LAYOUT.TXT)
Data Files
02/23/2026
Area District Finance File (AREADIST.TXT)
Data Files
02/23/2026
Area/District 3-digit and 5-digit ZIP Code Assignments (AREA_DIST_ZIP.TXT)
Data Files
02/23/2026
Move to Competitive Street Addressing (MTC SA) List

This .txt file contains the MTC SA List.

Announcements
02/22/2026
Delivery - Mesa Verde National Park Post Office - Temporary Closed
Release Notes
02/22/2026
February 22 2026 Release Notes
Announcements
02/20/2026
DELIVERY - Military Post Offices Temporarily Suspended
Data Files
02/20/2026
Undeliverable-as-Addressed (UAA) Mail Roll-Up 1998-2025

This spreadsheet provides a breakdown of Total UAA mail by mail class from FY1998 thru FY2025.

Error Codes
02/19/2026
Known Issues List 2.19.2026