Publications
04/01/2025
Combined Service Standard Directory-FCM
Publications
04/01/2025
3D Base Service Standard Directory
User Guides
04/01/2025
Service Standards File Layouts/Release Notes

The Postal Service is looking to move ahead with service standard changes to support Delivering for America network changes. We intend to continue providing service standard data files for customer use to determine the number of days in transit. This tech sheet will provide the future proposed file layouts to help customers understand upcoming changes associated with the proposed changes. Along with file layout changes, we are now incorporating Presort First-Class Service Standards.

Data Files
04/01/2025
ZIP Codes by Area and District codes

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

Announcements
03/31/2025
2025 National Postal Forum – Registration Closes This Week
Announcements
03/31/2025
INFORMATIONAL: Mailing & Shipping Solutions Center (MSSC) Announces eVS Helpdesk Transition
Data Files
03/31/2025
***Updated - New Areas*** - Area District 5-digit ZIP Codes (AREADIST_ZIP5.TXT)
Data Files
03/31/2025
City/State ZIP Code Weekly Compare
Release Notes
03/31/2025
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.

Data Files
03/31/2025
3 Digit ZIP/AISU Office List (AISUREPT.TXT)