A DUNS (Data Universal Numbering System) number is a unique nine-digit identifier for businesses. This number is provided to businesses by a company called Dun & Bradstreet and receiving this number is an essential part of getting through your Apple Developer Account steps.

You can find a comprehensive explanation of what a DUNS number is and how it works on the D&B website here.

Any registered business should already have a DUNS number assigned to them and getting this number from the Dun & Bradstreet website is a very simple process. Click here to learn more about how to get your DUNS number.