Products, Services and Publications
Copyright © 2006 United States Postal Service
National Customer Support Center

Zone Analysis Program

The Zone Analysis Program (ZAP) provides a common platform to measure the quality of Zone assignments, ensuring the accuracy of postage rates claimed in accordance with requirements set forth in the DMM^® reference manual. Software products that successfully complete the ZAP testing process are identified as ZAP approved. ZAP-approved software developers are retested on an annual basis.

The USPS provides Zone Chart information in an electronic format to assist mailers in developing software that provides accurate zone assignment to mail. To qualify for ZAP approval, the software developer must subscribe to the electronic National Zone Chart Matrix, and their software must incorporate the most recent version of the National Zone Chart Matrix.

Publishers who use ZAP-approved software can forego the zone analysis during their annual Postage Payment Review. When using ZAP approved software, the publisher's Postal forms and USPS^® qualification report will indicate 'ZAP' and the Zone Chart Matrix date of the data used.

For more information, contact the ZAP program coordinator at 1-800-238-3150.