Data Files
12/29/2025
AISU ZIP Code Record and AISU Address Record Descriptions (AISULOUT.TXT)
Data Files
12/29/2025
AISU ZIP Code File (AISUZIPS.TXT)
Data Files
12/29/2025
AISU Contact Information (AISUADDR.TXT)
Data Files
12/29/2025
Area District Finance File Specification (AREA_DIST_LAYOUT.TXT)
Data Files
12/29/2025
Area District Finance File (AREADIST.TXT)
Data Files
12/29/2025
Area/District 3-digit and 5-digit ZIP Code Assignments (AREA_DIST_ZIP.TXT)
Data Files
12/29/2025
Move to Competitive Street Addressing (MTC SA) List

This .txt file contains the MTC SA List.

Announcements
12/26/2025
DELIVERY - Wrightwood Post Office (92397) - Temporarily Closed
Announcements
12/26/2025
DELIVERY - Lytle Creek Post Office (92358) - Temporarily Closed
Announcements
12/23/2025
INFORMATIONAL - USPS APIs System Maintenance January 14, 2026