How can a DUNS number help me? Then are 4 ways a DUNS number can help you Establish business creditworthiness. Your DUNS number is directly tied to the credit profile D&B builds on your business. In fact, to indeed have a D&B PAYDEX score, (you can check yours with Nav) you ’ll need a DUNS number . When merchandisers or suppliers look up your business credit profile because they're considering doing business with you and offering your business trade credit, or a lender who's considering advancing to your business, they ’ll want to see a credit history. Keep in mind that your credit profile wo n’t be important use to you (and can actually harm you) until you begin establishing a strong business credit history. Guard your particular creditworthiness. When you do n’t have a DUNS number tied to your business credit profile, you ’ll need to depend more on your particular credit for business purposes. This can ...