The 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.

Individual Zone Charts are located on the Postal Explorer website.

For more detailed information regarding the National Zone Charts Matrix, please refer to the National Zone Charts Matrix technical guide. An order form is also available for download.