[header] How to sell to the government [title] Obtain your duns number. [step] A duns number, or dun & bradstreet number, will provide your business with a specific numerical identification. This number will be used by the government to identify your business. 
You'll need a duns number before you can finish setting up your business and get started looking for contracts. [substeps] You can get started setting up your duns number here http: // fedgov.