Technical Specifications
11/28/2025
11/28/2025
FAQs
11/28/2025
11/28/2025
Data Files
11/28/2025
11/28/2025
NCOALink® Statistics
This spreadsheet includes NCOALink statistics from 2007-2024 by licensee type.
Data Files
11/28/2025
11/28/2025
Z4 Info File
A downloadable ZIP file containing information related to the Z4 Info File
Data Files
11/28/2025
11/28/2025
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.
Release Notes
11/26/2025
11/26/2025
Program Requirements
11/26/2025
11/26/2025
Tech Guides
11/26/2025
11/26/2025
PostalOne! Release 63.0.0.0 Mail.XML TEM WSDLs
This ZIP file contains the Web Services Description Language (WSDL) and XML Schema Definition (XSD) files for Mail.XML™ TEM Release 63.0.0.0
Tech Guides
11/26/2025
11/26/2025
Tech Guides
11/26/2025
11/26/2025
PostalOne! Release 63.0.0.0 Mail.XML PROD WSDLs
This ZIP file contains the Web Services Description Language (WSDL) and XML Schema Definition (XSD) files for Mail.XML™ PROD Release 63.0.0.0