Your registration number is printed on your vehicle registration card, which your state's motor vehicle department mails to you after you register a car

The registration number — also called a registration plate number or plate number — is a unique identifier assigned to your vehicle. It appears on the physical metal or plastic plate bolted to your car's front and rear bumpers, and it also appears on the paper or card your state's Department of Motor Vehicles (or equivalent agency) sends you. If you need to find it quickly, the easiest place to look is your registration card, which you should keep in your vehicle or at home.

The registration number is different from your Vehicle Identification Number (VIN), which is a longer code stamped into your car's frame and used for ownership and title purposes. Your registration number is what law enforcement and parking authorities use to identify your specific vehicle on the road.

Key Takeaways

  • Your registration number appears on the metal or plastic plate on your car's front and rear, and on the registration card your state mailed to you.
  • The registration card is the fastest place to find your number if you cannot see the plate clearly or need it for paperwork.
  • If you have lost your registration card, your state's motor vehicle department can issue a replacement or tell you your number over the phone.
  • Your registration number is not the same as your VIN; the registration number identifies your vehicle on the road, while the VIN is used for ownership records.

Check your registration card first

Your registration card is a small document, usually the size of a credit card or slightly larger, that your state's motor vehicle department mailed to you when you first registered your vehicle. The registration number is printed clearly on the front or back of this card. If you registered your vehicle recently, the card should have arrived within a few weeks of your registration being processed.

Keep this card in your vehicle at all times — it is a legal requirement in most states. If you have it with you, you can find your registration number without stepping outside or looking at the plate.

Look at your vehicle's registration plate

The registration plate is the metal or plastic plate bolted to the front and rear of your vehicle. The registration number is printed on this plate in large characters. In most states, the plate format includes letters and numbers, though the exact format varies by state — some states use a specific pattern, while others allow custom plates.

If the plate is dirty or damaged and you cannot read it clearly, you can clean it gently with a cloth. If the plate is missing or severely damaged, contact your state's motor vehicle department to report it and request a replacement.

Contact your state's motor vehicle department if you cannot find it

If you have lost your registration card and cannot read your plate, you can contact your state's Department of Motor Vehicles directly. Most states allow you to call or visit their website to look up your registration number using your driver's license number or vehicle identification number (VIN). Some states also allow you to request a replacement registration card by mail or online.

To prepare for this contact, have your driver's license and VIN ready. Your VIN is stamped on the driver's side of your dashboard (visible through the windshield from outside) and also appears on your title document. The motor vehicle department's phone number and website are listed on your state's government website.

Understanding the difference between registration number and VIN

Your registration number and your VIN serve different purposes. The registration number is what identifies your vehicle for road use and is tied to your registration status with the state. The VIN is a 17-character code that identifies the vehicle itself — its make, model, year, and manufacturing details — and is used for ownership, title, and insurance purposes.

When you renew your registration or move to a new state, your registration number may change, but your VIN stays the same for the life of the vehicle. Both numbers are important to have on hand for different situations: use your registration number for traffic stops and parking matters, and your VIN for insurance claims, title transfers, and vehicle history reports.

What to do if your registration plate is damaged or missing

If your registration plate is damaged, faded, or missing, you should report it to your state's motor vehicle department and request a replacement. Most states charge a small fee for a replacement plate, though some waive the fee if the plate was damaged due to normal wear and tear.

You can usually request a replacement plate online, by mail, or in person at a motor vehicle office. The replacement typically arrives within two to four weeks. Until it arrives, keep a copy of your registration card with you while driving, as it serves as proof of registration if you are stopped by law enforcement.

Frequently Asked Questions

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

Yes. The registration number and the license plate number are the same thing — they both refer to the unique identifier printed on your vehicle's plate. This is the number law enforcement uses to identify your vehicle.

Can I look up my registration number online?

Most states allow you to look up your registration number through their motor vehicle department website using your driver's license number or VIN. Visit your state's official motor vehicle website to see what information you need to provide.

What if I moved to a new state — does my registration number change?

Yes. When you register your vehicle in a new state, you receive a new registration number and a new plate. You must complete this process within the timeframe your new state requires, which is typically 30 to 90 days after moving.

Do I need my registration number to renew my registration?

You do not need it to start the renewal process, but having it on hand makes it faster. Your state's motor vehicle department can look up your account using your driver's license number or VIN. Your registration card or plate will have the number if you need to reference it.

What if my registration card and plate are both lost?

Contact your state's motor vehicle department by phone or online. Provide your driver's license number and VIN, and they will tell you your registration number. You can then request replacement documents and a new plate through the same contact.