Contact Lists
07/25/2024
CASS™ Software Manufacturers Data File Cycle O: Certified Products Guide (D) - (Expires July 31, 2028)
Contact Lists
07/25/2024
CASS™ Software Manufacturers Cycle O - (Expires July 31, 2028)
Contact Lists
07/25/2024
CASS™/MASS™ Certified Products Guide - All Sections Data Files Cycle O - (Expires July 31, 2028)

This document contains the certified vendors list for CASS™ and MASS™ products for Cycle O.

Data Files
07/25/2024
Z4 Info File

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

Data Files
07/25/2024
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
07/24/2024
INFORMATIONAL - USPS Mailing Promotions
Announcements
07/24/2024
DELIVERY: Atlantic Area – North Carolina District Mooresville Office (28115) – Resumed All Services
Announcements
07/24/2024
INFORMATIONAL: Discontinuance of the Dual-Use Priority Mail/Priority Mail Express Medium Tube Box
Announcements
07/24/2024
DELIVERY: WestPac Area - ID-MT-OR District - Jamieson Post Office (97909) - Reopened
Announcements
07/24/2024
INFORMATIONAL: USPS Ship INCIDENT #8868714 Census Attributes Data Feed