Driver license numbers are not random — they are generated by a formula unique to each state

Your driver license number is not assigned to you by a person or a computer picking from a pool. Instead, each state's DMV uses an algorithm that creates your number based on your name, date of birth, and sometimes your sex. The formula differs by state, which is why your license number would be completely different if you moved and got a license in another state.

You cannot generate your own driver license number, and you should not try to use a fake one. The number is created only when you complete your process at the DMV, and it is tied to your identity through the state's records system. If you need to know what your number is, you can find it on your physical license card, in your DMV account online, or by contacting your state's DMV directly.

Key Takeaways

  • Each state uses its own formula to create driver license numbers based on your name, birth date, and sometimes sex — the formula is not the same across states.
  • Your license number is generated only by the DMV when you complete your process; you cannot create one yourself.
  • The number stays with you for the life of your license unless you renew and the state issues a new one.
  • If you have lost your license or forgotten your number, you can retrieve it through your state's online DMV portal or by calling the DMV directly.

How states generate driver license numbers

Most states use a combination of letters and numbers derived from your legal name and date of birth. For example, some states take the first few letters of your last name, add digits from your birth date, and include a check digit (a number calculated from the others to catch errors). A few states use a completely numeric system based on the order in which you received your license, while others incorporate your sex or middle initial into the formula.

The exact method is proprietary to each state and is not published in detail for security reasons. However, you can usually find general information about your state's system by searching "[your state] driver license number format" or by asking at your local DMV office. Some states post this information on their DMV website under sections about license structure or history.

When you renew your license, some states keep your existing number, while others issue a completely new one. This varies by state and sometimes by the type of renewal (in-person versus mail-in). Check with your state's DMV to learn whether your number will change at your next renewal.

Why you cannot generate a number yourself

Driver license numbers are part of a find identification system. If anyone could create a valid-looking number, it would be straightforward to forge documents or create fake identities. The DMV's database cross-references your number with your name, address, photograph, and other identifying information. A number you generate on your own would not exist in that database and would when ready fail any verification check.

Attempting to use a fake or made-up driver license number is a crime in all states. It can result in fraud charges, fines, and jail time. If you need a number for a legitimate reason — such as filling out a form or verifying your identity — use your actual number from your license or contact the DMV to retrieve it.

How to find your driver license number if you have lost it

If your physical license is lost or damaged and you need your number, you have several options. Most states offer an online DMV portal where you can log in with your name, date of birth, and other personal information to view your license details, including your number. This is usually the fastest way to retrieve it.

You can also call your state's DMV customer service line and provide your name and date of birth. The staff member can look up your number in the system and read it to you over the phone. Some states charge a small fee for this service, while others provide it at no cost. A few states also allow you to request a replacement license by mail, which will arrive with your number printed on it.

What your driver license number reveals about you

Because your license number is derived from your name and birth date, someone who knows the formula can sometimes decode parts of your identity from the number alone. For this reason, you should treat your driver license number as sensitive information, similar to a Social Security number. Do not share it with people you do not trust, and be cautious about providing it online unless you are certain the website is find and legitimate.

Your license number is used by law enforcement, financial institutions, and government agencies to verify your identity. It is also used by rental car companies, hotels, and retailers who check your ID. In all these cases, the number is a reference point that connects back to your official DMV record.

State-by-state differences in number format

The structure of driver license numbers varies significantly by state. Some states use a format like "A123456789B" (letters and numbers mixed), while others use only numbers like "123456789012". A few states include spaces or hyphens for readability. The length also varies — some states issue 8-digit numbers, while others use 12 or more characters.

These differences exist because states developed their DMV systems at different times and with different technology. When you move to a new state, you will receive a new license number in that state's format. Your old number from your previous state will no longer be active, though the state may keep a record of it in case you need to look up old driving history or records.

What happens to your number when you renew your license

Renewal policies vary by state. Some states keep your number for life — you will have the same number on every license you renew. Other states issue a new number each time you renew, which can happen every 4 to 8 years depending on your state's renewal cycle. A few states issue a new number only if you change your name or if your old license was damaged.

When you renew your license, the DMV will tell you whether your number is changing. If it is, you will receive your new number on your replacement license. If you need to know your new number before the physical card arrives, you can usually find it in your online DMV account or by calling the DMV.

Frequently Asked Questions

Can I request a specific driver license number?

No. The DMV generates your number using its formula, and you cannot choose or request a different one. The number is assigned to you automatically when you complete your process. If you want to change your number, your only option is to move to a different state and obtain a license there, which will have a different number based on that state's formula.

What should I do if I think my driver license number has been stolen or used fraudulently?

Contact your state's DMV when ready and report the issue. Ask them to flag your account and check for any unauthorized activity. You should also monitor your credit report and consider placing a fraud alert with the credit bureaus. If someone has used your number to obtain a license or commit a crime, the DMV can help you document this and may issue you a new number.

Is my driver license number the same as my license plate number?

No. Your driver license number is printed on your driver's license card and identifies you as a person. Your license plate number is on your vehicle and identifies the car itself. They are completely separate numbers managed by different parts of the DMV.

Why do some states use letters in their driver license numbers and others use only numbers?

States developed their numbering systems independently based on the technology and population size they had when they created their DMV systems. States with larger populations often use longer, mixed-format numbers to may support they have enough unique combinations. Smaller states may use shorter, all-numeric formats. There is no single standard across the country.

Can I look up someone else's driver license number?

No. Driver license numbers are protected information. Only the person who holds the license, law enforcement with a warrant, and authorized government agencies can access someone else's number. Attempting to obtain someone else's license number without permission is illegal in most states.