What if I cannot provide a DUNS number? Boris April 17, 2018 07:47 Updated A DUNS code is a 9 digit number, supplied by Dun & Bradstreet, Inc, which identifies the geographical location of your business. Look up your identification number on www.dnb.com. If your company doesn't have a DUNS number, you can leave this field blank. Related articles How to register my company? What if I cannot provide a VAT number? Webinar: Getting started with EcoVadis How do I choose the ISIC category of my company? How can I update my answers to the questionnaire or add new documents? Comments 0 comments Article is closed for comments.