What is RDI?

RDI™ stands for Residential Delivery Indicator. It's a process that allows you to determine whether an address is residential or business, and it should be an integral part of your address quality regimen.

Last mile issues often cause problems for package shippers. Not knowing whether an address is a business or residence can cause unexpected costs and delays for shippers. It can be even worse when you are shipping to a purported business that is run out of a residence-it appears you're shipping to a business, but are then hit with residential delivery fees with no way to recoup the costs! The solution for these issues is RDI.

RDI determines whether an address is classified as residential or business based on records in the USPS®Address Management System (AMS) database. An address is entered into an RDI capable system and a code is returned for the address. A code of ‘Yes’ indicates the address is a Business, while a ‘No’ code is given for Residential. RDI should be used in conjunction with CASS Certified™ ZIP + 4®address matching software.


RDI is available through the following Anchor Solutions:

MaxCASS OS is Anchor's CASS Certified solution for address correction and standardization (including the RDI™ option) with a fully customizable, drag-and-drop environment. Using MaxCASS OS for CASS processing is an easier way to maintain the most complete, correct and current addresses possible.


The Customer Data Hub is Anchor Software's Master Data Management system. This software package allows organizations to  coordinate disparate data systems into a single repository. For each customer or prospect, a single "golden record" is created enabling a 360° view of the customer.


AddressPro is a robust and highly scalable address quality web service solution using Anchor Software’s proven address cleansing technology to ensure the accuracy, completeness, and consistency of address data across the enterprise.

If you'd like more information about RDI options and how RDI can help reduce delivery costs, please fill out this form. We will have a consultant contact you within one business day to discuss adding RDI to your delivery operations.

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Note: In 2013 the USPS removed the requirement that RDI be used only for shipping parcels, as well as the USPS RDI License Agreement requirement.  Users will be able to purchase the data directly from the USPS or from participating software vendor. Therefore, RDI may now be used be by any organization to identify business and residential addresses for any purpose, which includes enhancing data quality and expanding marketing initiative.