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
ZIP Codes by Area and District codes

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

Presentations
03/31/2026
Pop-Up Mini Café: Brewed for Business: The Shipping Mini Café

 

Pop-Up Mini Café: Brewed for Business: The Shipping Mini Café

Passcode: 5T8K2$*L

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. 

Release Notes
03/29/2026
March 29 2026 PostalOne! Release Notes