Your plate number is printed on your registration card and on the metal plate itself

Your license plate number — also called your registration plate or tag number — appears in three places you can reach right now: on the metal plate bolted to the front and back of your vehicle, on your registration card (the paper document in your glove box), and on any registration renewal notices the state has sent you. If you need it when ready and can't get to your car, your registration card is the fastest source. The number is a combination of letters and numbers unique to your vehicle and state.

The format varies by state. Some states use a pattern like three letters followed by three numbers (ABC 123). Others mix them differently or add a county code at the start. Regardless of the format, that plate number is how the state's motor vehicle department tracks your vehicle's registration, insurance status, and inspection history.

Key Takeaways

  • Your plate number is printed on your registration card, visible on the metal plates on your vehicle, and listed on any renewal notices you have received.
  • If you have lost your registration card, you can contact your state's motor vehicle department with your vehicle identification number (VIN) to retrieve it.
  • The plate number format differs by state, but it is always a unique combination of letters and numbers assigned to your specific vehicle.
  • You will need your plate number for insurance claims, traffic citations, parking tickets, and to report your vehicle as stolen.

Check your registration card first

Your registration card is a small laminated document, usually wallet-sized, that came with your vehicle when you bought it or renewed your registration. Open your glove box — this is where most people keep it. The plate number is printed clearly on the front or back of the card, often labeled as "License Plate Number," "Plate Number," or "Tag Number."

If you have received a renewal notice from your state in the mail, that document also displays your plate number at the top or in a box on the front. Keep these notices until your new registration arrives, because they serve as proof of registration if you are stopped by police.

Look at the metal plates on your vehicle

Walk to the front of your car. The metal plate bolted to the bumper or frame displays your plate number in large characters. Write down exactly what you see — letters first, then numbers, in the order they appear. Some states use a space or hyphen between letters and numbers; write that too if it is there.

Check the rear plate as well. In most states, both plates carry the same number. If they differ, contact your state's motor vehicle department, because that indicates a registration problem. The rear plate is often easier to photograph if you need a clear image for insurance or legal purposes.

Contact your state motor vehicle department if you have lost your card

If your registration card is missing and you cannot see your plates clearly (for example, if your vehicle is in storage or the plates are damaged), call your state's motor vehicle department. You will need your vehicle identification number (VIN), which is stamped on the driver's side dashboard near the windshield and also appears on your insurance documents and title.

Most states allow you to look up your plate number online through their motor vehicle website using your VIN and driver's license number. Some states charge a small fee for a replacement registration card, typically between $5 and $15, though this varies. A few states mail a replacement free of charge.

Why you need your plate number and when to use it

Your plate number is required for several transactions and situations. If you are in a traffic accident, you will give your plate number to the other driver and to police. If you receive a parking ticket or traffic citation, the officer writes your plate number on the ticket. If you file an insurance claim, your insurer will ask for it to verify your vehicle and policy.

If your vehicle is stolen, you report the plate number to police so they can broadcast it to other officers and add it to a stolen vehicle database. If you are renewing your registration online or by mail, you will need your plate number to confirm your identity. Some states also require it when you renew your vehicle inspection or update your address on file.

What to do if your plate number has changed

If you recently received new plates from your state — because you moved, renewed your registration, or requested a vanity plate — your old registration card may still show the old number. Do not use the old number for insurance or legal purposes. Use only the number on your new metal plates.

Your new registration card will arrive in the mail within one to three weeks of your renewal. Until it arrives, keep the renewal notice or receipt that shows your new plate number. If you need to prove your registration before the card arrives, that notice is acceptable to police in most states.

Frequently Asked Questions

What if I can't find my registration card and my plates are too dirty to read?

Call your state's motor vehicle department with your VIN and driver's license number. They can tell you your plate number over the phone or direct you to look it up online. You can also check your insurance documents, which usually list your plate number.

Are the front and back plate numbers always the same?

Yes, in all 50 states. Both plates carry the same registration number. If they differ, one plate may be from a previous registration and needs to be replaced. Contact your motor vehicle department to report the mismatch.

Do I need my plate number to renew my registration?

Most states ask for it during online or mail renewal to confirm your identity, but it is not always required if you provide your VIN and driver's license number. Check your state's renewal form or website to see what information they request.

Can I look up someone else's plate number online?

No. Most states do not allow public searches of plate numbers for privacy reasons. If you need information about a vehicle involved in an accident or crime, report it to police and they can look it up through law enforcement databases.

What if my plate number has letters that look like numbers, like the letter O and the number 0?

Write it exactly as it appears on the plate. If you are unsure, photograph the plate or check your registration card, which will clarify any ambiguous characters. When you provide it verbally, you can say "letter O" or "number zero" to avoid confusion.