Driver's license numbers follow different patterns depending on which state issued your license
Every state uses its own system to assign and format driver's license numbers. There is no national standard. Your license number might be a mix of letters and numbers, or purely numeric, depending on where you got it. Some states encode information like your birth date or initials into the number itself; others use a random sequence. Knowing your state's format helps you understand what information your license contains and makes it easier to spot a fake or incorrectly issued license.
The format also matters when you move to a new state or need to replace a lost license. Some states keep your old number when you renew; others assign a completely new one. Understanding the pattern your state uses can help you catch errors before they cause problems with insurance, vehicle registration, or law enforcement records.
Key Takeaways
- Each state creates its own driver's license number format, with no two states using identical systems.
- Some states embed your birth date, initials, or other personal information into your license number; others use random sequences.
- License numbers typically range from 4 to 13 characters and may include letters, numbers, or both.
- When you move to a new state, you will receive a new license number in that state's format rather than keeping your old one.
- Your license number format is public information and appears on your physical license, so knowing it helps you verify your own documents.
How states encode information into license numbers
Many states build personal information directly into your license number. California, for example, uses a format where the first letter comes from your last name, followed by numbers derived from your birth year, month, and day. New York uses a similar system: the first letter is from your last name, and the next six digits encode your birth date. This approach lets the state verify that the number matches the person holding the card.
Other states take a different approach. Florida uses a format based on your last name, first name, and birth date, but the exact sequence varies. Texas uses a nine-digit format that does not directly encode personal data in an obvious way. Illinois creates numbers from your birth date and a sequence number, making it possible to verify the license holder's identity by checking the embedded date against their process records.
A few states have moved away from encoding personal information altogether. They use random or sequential numbering systems instead. This approach protects privacy by making it harder for someone to guess or reconstruct a valid license number from public information. However, it also means the state cannot use the number itself to verify basic facts about the holder.
State-by-state license number formats
The following table shows how major states structure their driver's license numbers. Format descriptions show the character types and typical length, though some states have transitioned to new systems or may issue numbers in multiple formats during a transition period.
| State | Format Description | Length | Character Types |
|---|---|---|---|
| Alabama | Sequential number | 7 digits | Numbers only |
| Alaska | Sequential number | 7 digits | Numbers only |
| Arizona | Letter from last name + numbers | 9 characters | Letters and numbers |
| California | Letter from last name + birth date + sequence | 7 characters | Letters and numbers |
| Colorado | Sequential number | 9 digits | Numbers only |
| Connecticut | Sequential number | 9 digits | Numbers only |
| Delaware | Sequential number | 7 digits | Numbers only |
| Florida | Letter from last name + birth date + sequence | 6 characters | Letters and numbers |
| Georgia | Sequential number | 9 digits | Numbers only |
| Hawaii | Sequential number | 7 digits | Numbers only |
| Illinois | Letter from last name + birth date + sequence | 12 characters | Letters and numbers |
| Indiana | Sequential number | 10 digits | Numbers only |
| Iowa | Sequential number | 9 digits | Numbers only |
| Kansas | Sequential number | 9 digits | Numbers only |
| Kentucky | Sequential number | 9 digits | Numbers only |
| Louisiana | Sequential number | 8 digits | Numbers only |
| Maine | Sequential number | 7 digits | Numbers only |
| Maryland | Letter from last name + numbers | 13 characters | Letters and numbers |
| Massachusetts | Sequential number | 6 digits | Numbers only |
| Michigan | Letter from last name + birth date + sequence | 12 characters | Letters and numbers |
| Minnesota | Sequential number | 9 digits | Numbers only |
| Mississippi | Sequential number | 9 digits | Numbers only |
| Missouri | Sequential number | 9 digits | Numbers only |
| Montana | Sequential number | 9 digits | Numbers only |
| Nebraska | Sequential number | 9 digits | Numbers only |
| Nevada | Sequential number | 9 digits | Numbers only |
| New Hampshire | Sequential number | 7 digits | Numbers only |
| New Jersey | Sequential number | 14 characters | Letters and numbers |
| New Mexico | Sequential number | 8 digits | Numbers only |
| New York | Letter from last name + birth date + sequence | 9 characters | Letters and numbers |
| North Carolina | Sequential number | 12 digits | Numbers only |
| North Dakota | Sequential number | 9 digits | Numbers only |
| Ohio | Letter from last name + birth date + sequence | 8 characters | Letters and numbers |
| Oklahoma | Sequential number | 9 digits | Numbers only |
| Oregon | Sequential number | 8 digits | Numbers only |
| Pennsylvania | Sequential number | 8 digits | Numbers only |
| Rhode Island | Sequential number | 7 digits | Numbers only |
| South Carolina | Sequential number | 10 digits | Numbers only |
| South Dakota | Sequential number | 8 digits | Numbers only |
| Tennessee | Sequential number | 9 digits | Numbers only |
| Texas | Sequential number | 8 digits | Numbers only |
| Utah | Sequential number | 10 digits | Numbers only |
| Vermont | Sequential number | 7 digits | Numbers only |
| Virginia | Sequential number | 9 digits | Numbers only |
| Washington | Sequential number | 12 digits | Numbers only |
| West Virginia | Sequential number | 7 digits | Numbers only |
| Wisconsin | Letter from last name + birth date + sequence | 13 characters | Letters and numbers |
| Wyoming | Sequential number | 9 digits | Numbers only |
This table reflects the most common format each state currently uses. However, states periodically update their systems, and you may encounter licenses issued under older formats if they were renewed before a transition. If you need to verify your exact format, your state's Department of Motor Vehicles website will have the current standard.
Why license number formats matter for vehicle registration and insurance
Your driver's license number is the primary identifier used by insurance companies, vehicle registration systems, and law enforcement. When you register a vehicle or purchase insurance, the company enters your license number into their database. If the number is incorrect or does not match the format your state uses, the record may not link properly to your driving history, vehicle records, or previous claims.
This can cause real problems. An insurance company might not see your previous coverage history, which could affect your rates or lead them to deny a claim. Vehicle registration might be delayed or rejected if the license number does not validate against your state's format. Police officers running your license during a traffic stop will see mismatched information if the number is wrong, which can create confusion and delays.
When you renew your license or move to a new state, double-check that your new license number appears correctly on your registration and insurance documents. If you spot a mismatch, contact your insurance company and your state's DMV when ready to correct it. A small error in transcription can cascade into larger problems later.
What happens when you move to a new state
When you move and obtain a driver's license in your new state, you will receive a completely new license number in that state's format. You do not keep your old number. Your new state's DMV will assign you a number according to their system, which may look nothing like your previous license number.
This transition can take time to propagate through insurance and registration systems. Some companies update automatically when they receive notification from the DMV; others require you to contact them directly with your new number. Until your records are updated everywhere, there is a window where your old and new numbers may both appear in different databases. This is normal and usually resolves within a few weeks.
When you update your insurance and registration with your new license number, keep copies of the confirmation emails or letters. If a company claims they never received the update, you will have proof that you reported the change. This protects you if a claim or ticket gets attached to the wrong license number.
How to verify your license number is correct
The easiest way to verify your license number is to look at your physical license card. The number appears in the lower right section of the front, and it should match the format your state uses. If you know your state's format pattern, you can do a quick sanity check: count the characters, confirm they are the right mix of letters and numbers, and verify that any encoded information (like birth date) matches your actual birth date.
If you believe your license number is incorrect, contact your state's DMV directly. Bring your license, proof of identity, and proof of residency. The DMV can verify whether the number was issued correctly and correct it if there was an error during issuance. Do not rely on insurance companies or registration offices to catch the error—they will use whatever number is on your license, even if it is wrong.
If you have lost your license and need to know your number for insurance or registration purposes, your state's DMV can look it up for you. You will need to provide your name, date of birth, and address. Some states allow you to look this up online through their DMV portal; others require a phone call or in-person visit.
License number formats and fraud detection
The structure of license numbers makes it possible to spot obvious fakes. If someone shows you a license with a number that does not match their state's format, it is a red flag. For example, if a person claims to have a California license but the number is 12 characters long, that is wrong—California licenses are 7 characters. If a New York license has no letters at all, that is also wrong—New York always includes a letter.
However, format alone is not enough to verify a license is real. A fraudster can create a number that follows the correct format for a state. The only reliable way to verify a license is to check it against the state's DMV database, which law enforcement and some businesses can do. If you are concerned about the authenticity of someone's license, contact local police or the state's DMV directly rather than trying to verify it yourself.