Your registration number is printed on your vehicle registration card and on your license plate

Your car registration number — also called a registration plate number, plate number, or VIN-related identifier depending on context — appears in multiple places on your vehicle and documents. The fastest place to check is your registration card, the document your state's motor vehicle department mailed to you when you registered the car. It's also visible on the front and rear license plates bolted to your vehicle. If you've lost the card or can't remember where you put it, you can retrieve the number from your state's motor vehicle agency online or by phone.

The registration number and the Vehicle Identification Number (VIN) are different things. Your registration number is what appears on your license plate — typically a combination of letters and numbers unique to your vehicle in your state. Your VIN is a 17-character code that identifies the vehicle itself and appears on multiple documents and locations on the car. Both are useful, but when someone asks for your "registration number," they usually mean the plate number.

Key Takeaways

  • Your registration card, mailed by your state's motor vehicle department, displays your registration number clearly on the front.
  • The same number appears on both your front and rear license plates in the format your state uses.
  • You can look up your registration number through your state's motor vehicle agency website or by calling their customer service line.
  • If your registration card is lost or damaged, you can request a replacement from your state's motor vehicle department, usually for a small fee.

Check your registration card first

Your registration card is the official document issued by your state's Department of Motor Vehicles (or equivalent agency — some states call it the Secretary of State or Registry of Motor Vehicles). When you registered your vehicle, this card was mailed to your address. The registration number is printed prominently on the front of the card, usually near the top or in a clearly marked field.

The card also lists your vehicle's make, model, year, and VIN. Keep this card in your vehicle or in a safe place at home. Many states require you to carry it while driving, and you'll need it for insurance, repairs, and registration renewals. If you've moved since you registered the car, check whether the card was forwarded to your new address or is still at your old one.

Look at your license plates

Your registration number is the same as your license plate number — the combination of letters and numbers on the metal or plastic plate attached to the front and rear of your vehicle. Every state formats these differently. Some use all letters, some use all numbers, and most use a mix. The number is the same on both the front and rear plates.

If your plates are damaged, faded, or missing, you can still see the number if you have your registration card. If both your card and plates are gone, contact your state's motor vehicle agency to look it up. You'll need to provide your VIN or driver's license number to retrieve it.

Use your state's motor vehicle agency website

Every state motor vehicle agency maintains an online portal where you can look up your registration information. The process varies by state, but most require you to enter your driver's license number, VIN, or the last four digits of your Social Security number. Some states offer this lookup for free; others charge a small fee.

To find your state's portal, search for "[Your State] Department of Motor Vehicles" or "[Your State] motor vehicle registration lookup." The official state website will have a link to their online services. If you can't find it or prefer not to use the website, call your state's motor vehicle customer service line. They can provide your registration number over the phone after verifying your identity.

Call your state's motor vehicle agency

If you don't have internet access or prefer to speak with someone, call your state's motor vehicle department directly. Have your driver's license number, VIN, or vehicle information ready. The representative will verify your identity and provide your registration number.

Wait times vary depending on the time of day and how busy the agency is. Early morning or mid-week calls often have shorter waits. Some states also offer chat support through their websites as an alternative to phone calls.

Request a replacement registration card

If your registration card is lost, stolen, or damaged, you can request a replacement from your state's motor vehicle agency. Most states allow you to order a duplicate card online, by mail, or in person at a local office. The replacement usually arrives within one to three weeks, though expedited options may be available for an additional fee.

When you request a replacement, you'll need to provide your driver's license number, VIN, or current registration information. Some states charge a replacement fee, typically between $5 and $25. Check your state's motor vehicle website for the exact process and cost in your area.

Check your insurance documents

Your car insurance policy or insurance card often lists your vehicle's registration number. If you have your insurance documents handy, look for the policy page that describes your vehicle — it will show the registration number along with the make, model, and year. This is a quick way to find the number if your registration card is temporarily misplaced.

Your insurance agent or company can also provide this information if you call them. They have your vehicle information on file and can read it to you over the phone or email it to you.

Frequently Asked Questions

Is my registration number the same as my VIN?

No. Your registration number is what appears on your license plate. Your VIN is a separate 17-character code that identifies the vehicle itself. Both are printed on your registration card, but they serve different purposes. Insurance companies and repair shops often ask for your VIN, while police and parking enforcement ask for your registration number.

What if I can't find my registration card and my plates are damaged?

Contact your state's motor vehicle agency by phone or through their website. Provide your driver's license number or VIN, and they'll look up your registration number for you. You can also request a replacement registration card at the same time.

Can I use my registration number to look up information about another person's vehicle?

Most state motor vehicle agencies restrict access to registration information for privacy reasons. You can look up your own registration details, but accessing someone else's information usually requires a legitimate reason and proper authorization. Contact your state's motor vehicle agency to learn what information is publicly available.

Do I need my registration number to renew my registration?

Most states send renewal notices to your address on file, and the notice includes your registration number. If you've moved and didn't receive a notice, you can look up your registration number through your state's website or by calling the motor vehicle agency. They'll help you complete the renewal process.

What if my registration number has changed?

Your registration number changes only if you get new license plates. This happens when you move to a different state, request vanity plates, or replace damaged plates. If you've done any of these, your state's motor vehicle agency will have issued new plates and updated your registration card. The old number is no longer valid.