National Zone Charts Matrix

The National Zone Charts Matrix was developed to assist mailers in applying the proper postage rates to a mailpiece. Postage rates for zoned mail are based on mailpiece weight and the distance the mailpiece travels using these zone assignments.


Please note that this page is moving to Please replace any bookmarks with the new URL.


Who is National Zone Charts Matrix for?

The National Zone Charts Matrix assists mailers in determining the distance that a mailpiece travels based on the ZIP Code™ where the mailpiece enters the mailstream (origination) and the ZIP Code that will deliver the mailpiece to the addressee (destination).

First Class Mail

First Class Mail





Standard Mail

Standard Mail

Latest Updates


What is the National Zone Charts Matrix?

National Zone Charts Matrix is used to assist mailers in determining the distance that a mailpiece travels based on the ZIP Code where the mailpiece enters the mailstream (origination) and the ZIP Code where the mailpiece is delivered to the addressee (destination). Postage rates for certain classes of mail are based on mailpiece weight as well as the distance the mailpiece travels. Please note, the matrix does not contain postage rates, only zone information.

Featured Resources

Tech Guides
International Service Center (ISC) Zone Chart Technical Guide

This document contains information about the technical guide for ISC Zone Chart.

Zone Chart Exceptions Presentation for Zone 9

This presentation is about Zone 9 and 5-Digit ZIP Code Exceptions.

Tech Guides
Zone Charts Matrix Technical Guide

This guide details technical information about the National Zone Charts Matrix.

Applications/ Forms
Zone Charts Order Form

This order form is used to subscribe to the National and International Service Center (ISC) Zone Charts Matrix & Labeling Lists Products.

Related Products

Address Matching System API (AMS API)

AMS API is software used to develop address matching software. This software provides access to USPS® matching logic, which allows users to verify the accuracy of ZIP + 4® returns.

Computerized Delivery Sequence (CDS)

The CDS program provides updated delivery sequence information on customer-provided address lists.


The DPV® Product identifies whether a ZIP + 4® coded address is currently represented in the USPS® delivery file as a known address record. It also allows users to confirm known USPS addresses, as well as, identify potential addressing issues that may hinder delivery.


DSF is an approved method outlined in the Domestic Mail Manual for sequencing mail pieces in walk-sequence when not using a simplified address.

Labeling Lists

The Labeling Lists Data Product assists mailers with presorting mail by providing active, originating 3- and 5-digit ZIP Code™ data, along with their destination locations, for labeling purposes. 



For more information about National Zone Charts, please contact Address Improvement and Administrative Support at 800-238-3150 Call: 800-238-3150 or