Error Codes
06/15/2026
Known Issues List 6.11.2026
Data Files
06/15/2026
***Updated - New Areas*** - Area District 5-digit ZIP Codes (AREADIST_ZIP5.TXT)
Data Files
06/15/2026
City/State ZIP Code Weekly Compare
Data Files
06/15/2026
3 Digit ZIP/AISU Office List (AISUREPT.TXT)
Data Files
06/15/2026
AIS Congressional District File (CONG_DIST.TXT)
Data Files
06/15/2026
AIS County Name Table Layout (AISCNTY.TXT)
Data Files
06/15/2026
AMS County Name Table (COUNTY_NAME_TABLE.TXT)
Contact Lists
06/15/2026
AMS Address Report: AISU Mailing List (ADDRREPT.TXT)
Data Files
06/15/2026
AISU ZIP Code Record and AISU Address Record Descriptions (AISULOUT.TXT)
Data Files
06/15/2026
AISU ZIP Code File (AISUZIPS.TXT)
Data Files
06/15/2026
AISU Contact Information (AISUADDR.TXT)
Data Files
06/15/2026
Area District Finance File Specification (AREA_DIST_LAYOUT.TXT)
Data Files
06/15/2026
Area District Finance File (AREADIST.TXT)
Data Files
06/15/2026
Area/District 3-digit and 5-digit ZIP Code Assignments (AREA_DIST_ZIP.TXT)
Data Files
06/15/2026
Move to Competitive Street Addressing (MTC SA) List

This .txt file contains the MTC SA List.

Announcements
06/12/2026
Power-up your Public Speaking Skills with Chris Lien
Release Notes
06/12/2026
PTR2 Release Notes_DD_06_13_26
Announcements
06/12/2026
DELIVERY - Commercial System Releases (June 20 – June 26)
Announcements
06/12/2026
DELIVERY - NC District Waco Post Office (28169) Temporarily Closed
Announcements
06/12/2026
DELIVERY - South Colton Post Office (13687) - Suspended Temporarily
Announcements
06/12/2026
INFORMATIONAL - USPS Occupancy Trends Product
Announcements
06/12/2026
INFORMATIONAL - USPS Population Mobility Trends Product
Release Notes
06/12/2026
Informed Visibility® Mail Tracking & Reporting (IV®-MTR) Release Notes

These release notes summarize new features and enhancements implemented in deployments to the IV-MTR application.

Announcements
06/11/2026
INFORMATIONAL - Upcoming USPS.com Maintenance on July 11, 2026
Release Notes
06/11/2026
USPS APIs Release Notes

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