Area/District 3-digit and 5-digit ZIP Code Assignments (AREA_DIST_ZIP.TXT)

Move to Competitive Street Addressing (MTC SA) List

This .txt file contains the MTC SA List.

Pending Route Adjustment File

This Excel sheet details route adjustments for June 2024 thru August 2024.

Z4 Info File

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

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.

Retail Distribution Codes (RDC) Assignment File

This downloadable file provides information on the Retail Distribution Codes (RDC) Assignment.

Retail Distribution Codes (RDC) Assignment File Compressed

This document provides information on the Retail Distribution Codes (RDC) Assignment File.

Cumulative Listing of ZIP Codes Covered by the LACS Database

This document provides a cumulative listing of ZIP Codes covered by the LACS database for LACS^Link®.

USPS Ship Data Dictionary

Detailed information on the USPS Ship (Formerly Package Platform) data elements available through the Informed Visibility Mail Tracking & Reporting (IV-MTR) application.

May 2024 Nixie Volume

This spreadsheet contains the UAA statistics for May 2024.