Welcome to the D&B D-U-N-S Request Service for US Federal Government Contractors and Grantees Dun & Bradstreet (D&B) provides a D-U-N-S Number, a unique nine digit identification number, for each physical location of your business. D-U-N-S Number assignment is FREE for all businesses required to register with the US Federal government for contracts or grants. Click here to request your D-U-N-S Number via the Web. If one does not exist for your business location, it can be created within 1 business day. Click here to request your D-U-N-S Number by phone, (for U.S., Puerto Rico, and U.S. Virgin Islands Only). For technical difficulties, contact govt@dnb.com