Data Files
01/12/2026
AISU ZIP Code File (AISUZIPS.TXT)
Data Files
01/12/2026
AISU Contact Information (AISUADDR.TXT)
Data Files
01/12/2026
Area District Finance File Specification (AREA_DIST_LAYOUT.TXT)
Data Files
01/12/2026
Area District Finance File (AREADIST.TXT)
Data Files
01/12/2026
Area/District 3-digit and 5-digit ZIP Code Assignments (AREA_DIST_ZIP.TXT)
Data Files
01/12/2026
Move to Competitive Street Addressing (MTC SA) List

This .txt file contains the MTC SA List.

Announcements
01/11/2026
DELIVERY: Southern Area - Texas 3 District -Stanton Post Office (79782) - Operations Temporarily Suspended
Announcements
01/09/2026
DELIVERY - Hewitt Post Office (07421) - Temporarily Closed
Tech Guides
01/09/2026
2026 Promotions Calendar and Technical Guide
Release Notes
01/09/2026
USPS APIs Release Notes

For the latest updates, please review the USPS APIs Release Notes.