Data Files
09/12/2024
Z4 Info File

A downloadable ZIP file containing information related to the Z4 Info File

Data Files
09/12/2024
Early Warning System (EWS002C0.ZIP)

This file is the EWS production file and is updated weekly. This file contains the Early Warning System data file for the CASS™ and MASS™ certification process.

 

Announcements
09/11/2024
DELIVERY: WestPac: California 4 District - Post Offices Temporarily Closed
Announcements
09/11/2024
DELIVERY: WestPac: California 6 District - Post Offices Temporarily Closed
Announcements
09/11/2024
DELIVERY: WestPac: California 3 District - Valyermo Post Office - Temporarily Closed
Publications
09/11/2024
2025 Promotions Calendar and Technical Information
Announcements
09/11/2024
INFORMATIONAL: Statement of Ownership Reminder - Disregard
Announcements
09/11/2024
INFORMATIONAL: USPS Enters into New Agreements with Package Consolidator Companies Consistent with its Delivering for America (DFA) Strategy
Announcements
09/11/2024
INFORMATIONAL: Informed Delivery Maintenance Outage
Release Notes
09/11/2024
USPS APIs Release Notes

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