what is a data universal numbering system duns number 
a data universal numbering system or duns number is a unique nine digit series of numerals that identifies a business dun bradstreet d b creates the number which generates a business profile in its database and provides a company s name phone number address number of workers and line of business along with other relevant corporate information the duns number is the most widely used method for identifying companies in the united states dun bradstreet maintains up to date information on hundreds of millions global businesses 1