Pricing & Classification DMM Advisory

Message board to keep postal customers informed of changes to mailing standards, services, and prices.

August 10, 2016

PO Box™ Throwback Table in the DPV® and AMS API Products

In an effort to facilitate growth in e-commerce and the package industry, the U.S. Postal Service® will integrate the PO Box™ Throwback table into both the Delivery Point Validation (DPV®) and Address Management System Application Programming Interface (AMS API) products.

With the addition of the PO Box Throwback table (Dph.hst), customers will be informed when a delivery point is a street address, but delivery is made to the customer’s PO Box address. The new feature will help mailers to make sure packages reach their intended destination.

The PO Box Throwback table will be included in the September 2016 release for both products.

Refer questions about integration of the PO Box Throwback table to the Licensing and Certification Department at