What Your Massachusetts Driver License Number Is and Where to Find It

Your Massachusetts driver license number is a unique nine-digit identifier printed on the front of your license, below your photograph. It is not your Social Security number, date of birth, or any other personal identifier — it is assigned by the Registry of Motor Vehicles (RMV) when you first receive your license and stays with you for life, even if you renew or replace your card.

The number appears in the upper right corner of your physical license and is also visible on your digital license if you use the Massachusetts mobile ID app. If you have lost your physical license but remember your number, you can use it to request a replacement without needing the original card.

If you cannot locate your license number and do not have your physical card, you can contact the RMV directly by phone at 857-368-8000 or visit an RMV branch in person with a photo ID. The RMV can look up your number using your name and date of birth. You can also find it on your registration documents if you own a vehicle registered in Massachusetts.

Key Takeaways

  • Your Massachusetts driver license number is a nine-digit code printed below your photo on the front of your license.
  • The number stays the same throughout your life, even when you renew your license or replace a lost card.
  • You can find your number on your physical license, digital mobile ID, or vehicle registration documents.
  • If you cannot locate it, the RMV can provide your number by phone or in person using your name and date of birth.
  • You will need your license number to renew your license, request a replacement, update your address, or conduct most RMV transactions.

When You Need Your License Number

Your driver license number is required for several common transactions with the RMV. When you renew your license online or by mail, you must provide this number to confirm your identity and pull up your existing record. If your license is lost, stolen, or damaged, you will need the number to request a replacement card.

You will also need it if you change your address, update your name, or modify any information on your license. Insurance companies ask for your license number when you get a quote or file a claim. Law enforcement may ask for it during a traffic stop, and employers often request it for background checks or employment verification.

Some private services — such as rental car companies, banks, and retailers checking ID for age-restricted purchases — will also ask for your license number. Keeping it memorized or written down in a safe place prevents delays when you need it on short notice.

How Massachusetts License Numbers Are Structured

Massachusetts driver license numbers follow a specific nine-digit format, but the digits themselves do not encode personal information like your birth date or initials. The RMV assigns the number sequentially as licenses are issued, so two people with similar names or birth dates will have completely different license numbers.

The format is consistent across all Massachusetts licenses issued in recent decades, making it straightforward to recognize a valid number when you see one. However, the RMV does not publish the exact algorithm or meaning behind each digit, so you cannot decode your own information from the number itself.

If you have held a Massachusetts license for many years, your number may follow an older format or have been reassigned if your license was revoked and later reinstated. In those cases, the RMV maintains a record of all your previous numbers, but your current license will display only the active number.

Replacing a Lost or Damaged License Number

If your license is lost or stolen, you do not lose your license number — it remains active in the RMV system. When you request a replacement card, the RMV will print the same nine-digit number on your new license. This means you do not need to memorize a new number or update any records with employers, insurance companies, or other organizations.

To replace a lost or damaged license, you can visit an RMV branch with a photo ID and proof of residency, or you can mail a completed process for Duplicate License (Form DL 34D) to the RMV along with the required documents. The replacement card typically arrives within 7 to 10 business days if you mail it, or you can receive it when ready at a branch if you explore in person.

If your license was damaged but still readable, you can surrender the old card and receive a replacement with the same number. If your license was lost or stolen, you may want to report it to local police, though this is not required by the RMV.

Protecting Your License Number

Your driver license number is considered sensitive personal information and should be treated similarly to your Social Security number. Do not share it with unknown callers, in unsecured emails, or on unsecured websites. Scammers sometimes pose as RMV staff or insurance agents to collect license numbers for identity theft.

The legitimate RMV will never call you asking for your license number or other personal details. If someone calls claiming to be from the RMV, hang up and call the RMV directly at 857-368-8000 to verify. Similarly, only provide your license number to official RMV websites (mass.gov/rmv) or to businesses you initiated contact with, such as your insurance company or rental car agency.

If you believe your license number has been compromised or used fraudulently, contact the RMV when ready and consider placing a fraud alert with the three major credit bureaus (Equifax, Experian, and TransUnion). You can also request a new license number from the RMV, though this is rare and requires documentation of the fraud.

Using Your License Number for Online RMV Transactions

The Massachusetts RMV allows you to handle many transactions online through its website at mass.gov/rmv, and you will need your license number to log in or verify your identity. Online services include license renewal, address changes, name changes, and ordering a duplicate license. You can also check the status of a pending process or look up vehicle registration information.

To use the online system, have your license number ready along with your date of birth and the last four digits of your Social Security number. The system will ask you to verify this information before allowing you to proceed. If you do not remember your license number, you can use your name and date of birth to search for it, though this may take longer.

Online transactions are usually faster than visiting a branch or mailing documents. Most online renewals are processed within a few days, and you can track the status of your new card on the RMV website. However, some transactions — such as obtaining a Real ID-compliant license for the first time — still require an in-person visit to an RMV branch.

Frequently Asked Questions

Can I change my driver license number?

No, you cannot request a different license number under normal circumstances. Your number is assigned by the RMV and remains the same throughout your life. The only exception is if you can document fraud or identity theft involving your number, in which case the RMV may issue a new one, but this is rare and requires proof.

What if I have two Massachusetts driver licenses with different numbers?

This should not happen, but if it does, contact the RMV when ready. You may have been issued a duplicate by mistake, or your old license may not have been properly deactivated when you renewed. The RMV can investigate and cancel the duplicate, leaving you with one active number.

Is my driver license number the same as my RMV ID number?

Yes, your driver license number and your RMV ID number are the same nine-digit code. The RMV uses this single number to track all your records, whether you hold a driver license, a state ID card, or both.

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

No, driver license numbers are private information protected by state law. The RMV will not release another person's license number to you, even if you claim to have a legitimate reason. Only the license holder, law enforcement, and authorized government agencies can access this information.

What should I do if I forget my license number before renewing online?

You can call the RMV at 857-368-8000 with your name and date of birth, and they will provide your number. You can also visit an RMV branch in person with a photo ID. Alternatively, check your vehicle registration, insurance documents, or any previous correspondence from the RMV — your number may appear on those documents.