How to Sign Up With Dun & Bradstreet and Get Your Free D-U-N-S Number

Dun & Bradstreet is one of the three major business credit bureaus, and for many suppliers and lenders it is the first one they check. To have a file there, your business needs a D-U-N-S number: a unique nine-digit identifier D&B assigns to your business. Getting one is free and it is a foundational step in building business credit, because without it your business is effectively invisible at D&B. Here is how to sign up and request yours.

Why you need a D-U-N-S number

A D-U-N-S number does two things. First, it uniquely identifies your business in Dun & Bradstreet's system, which many lenders, suppliers, and even government contracts rely on to look you up. Second, it anchors your D&B credit file, the file that carries your PAYDEX score, D&B's headline measure of whether you pay on time. Without a D-U-N-S number, you cannot build a PAYDEX score, and net-30 vendors that report to D&B have nowhere to attach your payment history. In short, the D-U-N-S number is the doorway to your entire Dun & Bradstreet credit profile.

Before you sign up

• Have your business's legal name, address, and phone number ready, exactly as they appear on your other records.
• Know your entity type and roughly when the business started.
• Decide whether you can wait for the free route (up to about 30 business days) or need it faster.
• Check first whether your business may already have a D-U-N-S number; some do without the owner realizing it.

How to sign up and request your D-U-N-S number, step by step

1. Go to the Dun & Bradstreet website (dnb.com) and find the option to request a D-U-N-S number. Look specifically for the free D-U-N-S request path.
2. Search for your business first to confirm whether a D-U-N-S number already exists for it. If one does, you do not need a new one.
3. If none exists, start the request and enter your business details: legal name, physical address, phone number, entity type, and when the business started, exactly as they appear elsewhere.
4. Choose the free option if you can wait. D&B offers a no-cost D-U-N-S request that can take up to roughly 30 business days to process. Expedited paid options exist if you need it sooner.
5. Submit your request and watch for confirmation. D&B may follow up to verify your business information.
6. Save your D-U-N-S number once issued, and note it alongside your EIN in your records. You will use it when applying for vendor accounts and funding.

After you get your D-U-N-S number

• Note your D-U-N-S number with your other business identifiers so it is easy to find.
• Begin opening net-30 vendor accounts that report to Dun & Bradstreet so your file starts to build.
• Watch your PAYDEX score begin to form as those on-time payments report.
• Keep your D&B business profile accurate; you can view and update your information through D&B's tools.

Free versus expedited: which to choose

Dun & Bradstreet offers a free path to a D-U-N-S number, and for most business owners that is the right choice. The trade-off is time: the free route can take up to roughly 30 business days to process. If you have a specific deadline, a vendor application, a contract, or a funding step that requires the number sooner, D&B sells expedited processing that delivers it faster. Unless you are on a clock, request the free D-U-N-S number early, well before you actually need it, and let the standard timeline run. Paying to expedite makes sense only when a real deadline is driving you.

What to do while you wait

The waiting period is not dead time. While your D-U-N-S request processes, you can line up the accounts that will build your file the moment the number is live. Confirm your business identity is consistent everywhere, open or verify your business bank account, and research which net-30 vendors report to Dun & Bradstreet so you are ready to apply in the right order. That way, the day your D-U-N-S number is issued, your file can start filling in immediately rather than starting from zero.

Common mistakes to avoid

• Paying when you did not need to. If you have no deadline, the free D-U-N-S request is fine. Do not pay to expedite out of impatience alone.
• Requesting a duplicate. Search first; some businesses already have a D-U-N-S number. A duplicate can fragment your D&B record.
• Entering inconsistent details. Your name, address, and phone should match your other records exactly, or verification slows and your identity fragments.
• Stopping at the number. The D-U-N-S is an identifier, not credit. Without reporting accounts attached to it, your file and PAYDEX score never build.

How your D-U-N-S number fits into building business credit

Your D-U-N-S number is the doorway to your Dun & Bradstreet file, but a doorway is not a house. The file only becomes valuable when reporting accounts attach on-time payments to it and your PAYDEX score forms. That means the D-U-N-S number is step one of a sequence, not the destination: identity, then D-U-N-S, then net-30 vendors that report to D&B, then higher tiers in order. Company Base OS is built around exactly this sequence, telling you which vendors report to Dun & Bradstreet and the precise order to open them so your file builds cleanly. The free Fundability quiz shows you where to start.