Announcements
07/21/2026
DELIVERY - Irvington Post Office (07111) - Temporarily Closed
Announcements
07/21/2026
INFORMATIONAL - USPS APIs System Release Notification – July 29, 2026
Announcements
07/21/2026
INFORMATIONAL - MyPFS Delivers a Faster, Smarter Support Experience for PFSC Customers
Announcements
07/21/2026
INFORMATIONAL - South Atlantic Region – Greensboro, NC Regional Processing and Distribution Center (RPDC) – Power Outage
Release Notes
07/21/2026
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.

Release Notes
07/20/2026
PTR2 Release Notes_DD_07_21_26
Announcements
07/20/2026
DELIVERY - Paulina Post Office - Temporarily Closed
Announcements
07/20/2026
INFORMATIONAL - Commercial System Releases – Week of July 25
Announcements
07/20/2026
INFORMATIONAL - Informed Visibility Mail Tracking & Reporting (IV-MTR) – Renaming of Existing Data Fields
Release Notes
07/20/2026
July 26 2026 EPS/eBill R8.6.0.0 Release Notes
Data Files
07/20/2026
***Updated - New Areas*** - Area District 5-digit ZIP Codes (AREADIST_ZIP5.TXT)
Data Files
07/20/2026
City/State ZIP Code Weekly Compare
Data Files
07/20/2026
3 Digit ZIP/AISU Office List (AISUREPT.TXT)
Data Files
07/20/2026
AIS Congressional District File (CONG_DIST.TXT)
Data Files
07/20/2026
AIS County Name Table Layout (AISCNTY.TXT)
Data Files
07/20/2026
AMS County Name Table (COUNTY_NAME_TABLE.TXT)
Data Files
07/20/2026
AMS Address Report: AISU Mailing List (ADDRREPT.TXT)
Data Files
07/20/2026
AISU ZIP Code Record and AISU Address Record Descriptions (AISULOUT.TXT)
Data Files
07/20/2026
AISU ZIP Code File (AISUZIPS.TXT)
Data Files
07/20/2026
AISU Contact Information (AISUADDR.TXT)
Data Files
07/20/2026
Area District Finance File Specification (AREA_DIST_LAYOUT.TXT)
Data Files
07/20/2026
Area District Finance File (AREADIST.TXT)
Data Files
07/20/2026
Area/District 3-digit and 5-digit ZIP Code Assignments (AREA_DIST_ZIP.TXT)
Data Files
07/20/2026
Move to Competitive Street Addressing (MTC SA) List

This .txt file contains the MTC SA List.

User Guides
07/20/2026
Domestic Merchant Returns API: User Guide

This user guide provides examples of XML transactions to the USPS Merchant Returns web service and guidance for installation.