Your driver's license control number is a unique identifier printed on your license that helps verify your identity

The control number (also called a document control number or DCN) is a code specific to your individual license card. It appears on the front or back of your physical license, usually as a series of numbers or a combination of letters and numbers. Each state formats and places this number differently — there is no national standard — but every license has one.

This number exists so that when someone scans or manually enters your license information into a system, they can confirm that the license is real and that the information on it has not been altered. It is tied to the records your state's Department of Motor Vehicles keeps about you.

Key Takeaways

  • The control number is a unique code on your driver's license that helps verify the license is authentic and unaltered.
  • Each state places and formats this number differently, so you may need to look at both sides of your license to find it.
  • You will need this number when renewing your license, explore for a Real ID, or providing proof of identity to government agencies.
  • The control number is not the same as your driver's license number — they are separate identifiers printed on your card.

Where to find your control number on your license

The location and format vary by state. In some states, it appears as a barcode or QR code on the back of the license. In others, it is printed as a series of numbers on the front, often near the bottom or in a corner. A few states print it in multiple places.

The easiest way to locate it is to look at both sides of your physical license and check your state's DMV website, which usually includes a diagram showing where the control number appears. If you cannot find it, you can call your state's DMV directly and provide your license number — they can tell you what the control number is.

Why you need to know your control number

You will most often need this number when renewing your driver's license or explore for a Real ID-compliant license. The DMV uses it to pull up your existing record and verify that you are the person requesting the renewal.

You may also need it if you are explore for certain government services, updating your address with the DMV, or if a law enforcement officer or government agency asks you to provide it as part of identity verification. Some financial institutions or employers may also request it when they need to confirm your identity against your license.

How the control number differs from your license number

Your driver's license number is the main identifier on your license — it is what most people think of as "your license number." The control number is separate and serves a different purpose. Your license number stays with you across renewals in most states, but your control number may change each time you renew because it is tied to that specific card.

Think of it this way: your license number is like your name, and your control number is like a serial number on a specific document. Both identify you, but they do different work in the system.

What happens if your control number is damaged or unreadable

If your license is worn, faded, or damaged so badly that the control number cannot be read, you should request a replacement card from your state's DMV. A damaged license can cause problems when you need to verify your identity, and the DMV can issue a new card with a new control number.

You do not need to wait for your license to expire to request a replacement. Most states allow you to request a duplicate or replacement card at any time, and the process is usually faster and cheaper than a full renewal. Contact your state's DMV to find out the specific process and any fees involved.

Control numbers and identity theft

Your control number is not secret information in the way a Social Security number is, but you should still be cautious about sharing it. If someone has your control number along with other information from your license, they could potentially use it to impersonate you or commit fraud.

Only provide your control number when a legitimate government agency or organization specifically requests it as part of an official process. If you are unsure whether a request is legitimate, contact your state's DMV directly using a phone number from their official website.

Frequently Asked Questions

Is my control number the same every time I renew my license?

No. Your control number is tied to the specific physical card you hold, so when you renew and receive a new card, you get a new control number. Your driver's license number typically stays the same across renewals, but the control number changes.

Can I look up my control number online?

Most states do not allow you to look up your control number through an online portal. You will need to check your physical license or call your state's DMV. Some states may include it in your digital license record if you have created an online account with the DMV.

What should I do if I lose my license before I can write down the control number?

You do not need to have the control number memorized. When you report your license lost and request a replacement, the DMV will issue you a new card with a new control number. You can find the new number on the replacement card when it arrives.

Do all states use the term "control number"?

Not all states use that exact term. Some call it a document control number, security number, or issue number. Check your state's DMV website to see what your state calls it and where it appears on your license.