Announcements
04/01/2026
INFORMATIONAL - USPS Modernization Through Package Equipment Upgrades in April 2026
Announcements
04/01/2026
INFORMATIONAL - Atlantic Area AIM Meeting June 2, 2026
Data Files
04/01/2026
March 2026 Nixie Volume

This spreadsheet contains the UAA statistics for March 2026.

Announcements
04/01/2026
INFORMATIONAL - Federal Register - Manifest Mailing System Retired April 1, 2026
Data Files
04/01/2026
Informed Visibility Mail Tracking & Reporting Machine Count

List of US Postal Service machines by site, including a description of each machine.

Data Files
04/01/2026
Informed Visibility® Mail Tracking & Reporting (IV®-MTR) Development Tracker

This document provides a list of active IV-MTR work to be as well as items completed in FY25.

 

*Please note, Postal Pro is the only source for a current IV-MTR Development log as updates will be made on an ongoing basis.

Release Notes
04/01/2026
USPS APIs Release Notes

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

Data Files
04/01/2026
ZIP Codes by Area and District codes

The Excel spreadsheet lists ZIP Codes with the associated Area and District Codes.  

Announcements
03/31/2026
DELIVERY - Southern Area - Puerto Rico District - Moca Post Office (00676) - Suspended
Announcements
03/31/2026
INFORMATIONAL - USPS Package Tracking Access Control Implementation (Effective Wednesday, April 1, 2026)
Announcements
03/31/2026
DELIVERY - Atlantic Area Easton Post Office (18042) - Closed Until Further Notice
Announcements
03/31/2026
INFORMATIONAL: Mail Spoken Here March 2026 Issue
Announcements
03/30/2026
INFORMATIONAL - USPS APIs System Maintenance April 15 Release
User Guides
03/30/2026
USPS APIs Terms and Conditions

ACKNOWLEDGEMENT AND ACCEPTANCE. Read this carefully before registering to use the USPS API services. By utilizing the APIs, you hereby ACCEPT ALL of the terms and conditions of this Agreement. 

FAQs
03/30/2026
USPS PTR2 API Known Issues
Data Files
03/30/2026
***Updated - New Areas*** - Area District 5-digit ZIP Codes (AREADIST_ZIP5.TXT)
Data Files
03/30/2026
City/State ZIP Code Weekly Compare
Data Files
03/30/2026
3 Digit ZIP/AISU Office List (AISUREPT.TXT)
Data Files
03/30/2026
AIS Congressional District File (CONG_DIST.TXT)
Data Files
03/30/2026
AIS County Name Table Layout (AISCNTY.TXT)
Data Files
03/30/2026
AMS County Name Table (COUNTY_NAME_TABLE.TXT)
Contact Lists
03/30/2026
AMS Address Report: AISU Mailing List (ADDRREPT.TXT)
Data Files
03/30/2026
AISU ZIP Code Record and AISU Address Record Descriptions (AISULOUT.TXT)
Data Files
03/30/2026
AISU ZIP Code File (AISUZIPS.TXT)
Data Files
03/30/2026
AISU Contact Information (AISUADDR.TXT)