Data Files
03/25/2024
Move to Competitive Street Addressing (MTC SA) List

This .txt file contains the MTC SA List.

Data Files
03/21/2024
Z4 Info File

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

Data Files
03/21/2024
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.

 

Data Files
03/20/2024
Zone Chart and Exceptions Test Files for Zone 10

Download this sample Test file to help prepare you for the proposed Zone 10.  Zone 10 will be represented as follows in the Zone Chart files - A in the Zone Chart Matrix and 10 in the Exception File. The Zone Chart Matrix has only a single character field for the zone, while the Exception File has a two-character field.  The test files are encrypted - contact labellist.ncsc@usps.gov for the encryption password.

Please note important dates below regarding the official release date for Zone 10 in the Zone Charts Matrix:

  • Live data for Zone 10 data will be available in the June 1st Zone Charts Matrix release.
  • IMPORTANT: Zone 10 will not be effective until after the USPS July Price Change. The USPS July Price change is effective July 14, 2024. There will be a special “Do Not Use Until” notice for mail entered before this effective date.
Data Files
03/18/2024
Pending Route Adjustment File

This Excel sheet details route adjustments for March 2024 thru May 2024.

Data Files
03/11/2024
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 LACSLink®.

Data Files
03/05/2024
ZIP Codes by Area and District codes

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