Data Files
03/16/2026
Area District Finance File (AREADIST.TXT)
Data Files
03/16/2026
Area/District 3-digit and 5-digit ZIP Code Assignments (AREA_DIST_ZIP.TXT)
Data Files
03/16/2026
Move to Competitive Street Addressing (MTC SA) List

This .txt file contains the MTC SA List.

Contact Lists
03/16/2026
Business Acceptance Solutions & Major Mailer Support Directory

This document provides a contact list for Business Acceptance Solutions (formerly Business Mailer Support) & Major Mailer Support

 

Announcements
03/13/2026
INFORMATIONAL - Commercial System Releases – March 22, 2026
Announcements
03/13/2026
INFORMATIONAL - USPS APIs System Maintenance March 25, 2026
  • 03/13/2026

    INFORMATIONAL - Expansion of Webinar API API Package Tracking Access Control, Address & NCOA APIs

  • 03/13/2026

    INFORMATIONAL - Commercial Systems Releases – March 15, 2026

  • 03/13/2026

    INFORMATIONAL - USPS APIs System Deployment March 15, 2026

    • Release Notes
    03/13/2026
    March 22 2026 Release Notes