What is a DUNS+4 ?

Data Universal Numbering System

What is a DUNS Number?

The DUNS Number is a unique nine-digit identification number provided by D&B. DUNS Number assignment is FREE for all businesses required to register with the U.S. Government for contracts or grants.

What is a DUNS +4?

A DUNS plus four is an alphanumeric four character set that follows a nine-digit DUNS number. This alphanumeric code is not associated, assigned or handled by D&B.

When adding additional bank accounts in SAM, the DUNS +4 extension allows the DLA to assign a new CAGE Code for each additional bank account entered on the Financial Information page of the SAM entity registration.

A DUNS +4 extension to a DUNS number is created by registrants in SAM when there is a need for more than one bank/Electronic Funds Transfer (EFT) account for a single location. D&B does not create or maintain the +4 number

Register a DUNS+4 


  1. Perhaps you should add language to the effect that when an entity does not have multiple bank accounts, the additional 4 numbers are 0000.
    There are a whole lot of SVOG applicants unnecessarily seeking the last 4 numbers of their DUNS #.

    Thank you

Leave a comment

Your email address will not be published. Required fields are marked *