A CDL scan is a database check that verifies your driving record and confirms you hold a valid commercial driver's license before you can operate a commercial vehicle legally

When you explore for a commercial driving job or renew your CDL, your employer or the state's licensing authority runs a Commercial Driver's License Information System (CDLIS) query. This scan pulls your complete driving history from the state where you hold your license, including violations, accidents, medical certifications, and any restrictions or endorsements on your record. The scan takes minutes and is the standard way employers and regulators verify that you are legally permitted to drive the vehicle class your job requires.

The scan is not something you run yourself — it happens behind the scenes when your employer submits your information to the state, or when you renew your license at your state's Department of Motor Vehicles (DMV). Understanding what appears in that scan and why it matters can help you catch errors before they cost you a job or a renewal.

Key Takeaways

  • A CDL scan checks the CDLIS database to confirm your license status, driving violations, medical certification, and any endorsements or restrictions tied to your record.
  • Employers run scans before hiring and periodically during employment to verify you remain legally may have access to to drive commercial vehicles.
  • Certain violations — such as DUIs, reckless driving, or operating without a valid endorsement — can disqualify you from holding a CDL or cause your employer to terminate you.
  • You can request a copy of your own driving record from your state's DMV to review what a scan will show before an employer sees it.
  • Medical certification status appears in the scan, so an expired medical card can flag you as ineligible even if your license itself is valid.

What information appears in a CDL scan

The CDLIS database contains your name, date of birth, license number, the state that issued your license, and the class of vehicle you are licensed to operate (Class A, B, or C). It also shows every endorsement you hold — tanker, hazmat, passenger, doubles/triples — and any restrictions, such as corrective lenses required or automatic transmission only.

The scan includes your complete driving history for the past three to ten years, depending on the violation. This covers moving violations (speeding, failure to obey traffic signals), at-fault accidents, DUIs or DWIs, reckless driving, and any suspensions or revocations of your license. It also displays your current medical certification status — whether your Department of Transportation (DOT) medical card is valid, expired, or pending renewal.

Any disqualifying events appear when ready. These include convictions for felonies involving a commercial vehicle, operating a commercial vehicle without a valid CDL, driving under the influence, leaving the scene of an accident, using a vehicle to commit a felony, or causing a fatality while driving. A single disqualifying conviction can result in a one-year or lifetime ban from holding a CDL, depending on the offense.

Why employers and regulators run CDL scans

Employers are required by federal law to verify that every driver they hire holds a valid CDL with the correct endorsements for the job. Running a scan before hiring protects the company from liability if an unqualified driver causes an accident or injury. It also ensures compliance with Department of Transportation (DOT) regulations, which mandate that only licensed drivers operate commercial vehicles.

Many employers also run periodic scans during employment — typically every three to twelve months — to catch violations or medical certification lapses before they become a legal problem. If a scan reveals that your medical card has expired or that you received a disqualifying violation, your employer can address it when ready rather than discovering it during a roadside inspection or accident investigation.

State regulators use scans to enforce CDL rules and to identify drivers who should no longer hold a license. If you accumulate too many violations within a set period, your license can be suspended or revoked based on a scan result.

How violations and medical status affect your scan results

Not all violations carry the same weight in a CDL scan. Major violations — such as speeding 15 miles per hour or more over the limit, reckless driving, improper lane changes, or following too closely — can disqualify you from employment even if they do not result in a license suspension. A single major violation may be enough for an employer to reject your process or terminate you.

Your medical certification is equally critical. Every CDL holder must maintain a valid DOT medical card, issued by a certified medical examiner. If your card expires and you continue to drive commercially, you are operating illegally. A scan will show your card as expired, and your employer is required to remove you from duty until you renew it. Some employers check medical status monthly; others rely on the driver to self-report.

Out-of-service orders also appear in scans. If you are placed out of service for a violation — such as operating with an expired medical card or without the required endorsement — that status remains visible until it is lifted by the issuing authority.

How to review your own CDL record before an employer does

You can obtain a copy of your driving record directly from your state's DMV before an employer runs a scan. This gives you a chance to spot errors, expired certifications, or violations you may have forgotten about. Contact your state's DMV or visit its website to request a certified copy of your driving record; most states charge a small fee (typically $5 to $15) and can provide it within one to two weeks.

When you receive your record, check that your license class, endorsements, and restrictions are correct. Verify that your medical certification date is current. Review the violation history to may support every entry is accurate — errors do occur, and you have the right to dispute them with the DMV.

If you find an error, contact your state's DMV when ready and request a correction. Bring documentation (such as a court record showing a violation was dismissed) to support your claim. Corrections can take several weeks, so start early if you know an employer scan is coming.

What happens if a scan reveals a problem

If a scan shows a violation or expired medical card, your employer will typically notify you and give you a window to resolve it. For an expired medical card, you must schedule an appointment with a DOT-certified medical examiner and renew it. For a violation, you may have limited options — you cannot undo a conviction, but you can work with your employer to understand whether it disqualifies you from the specific role.

If the scan reveals a disqualifying offense, your employer is legally required to remove you from commercial driving duties. Depending on the offense, you may be permanently barred from holding a CDL, or you may be may be able to access to reinstate your license after a waiting period (typically one to ten years). Some disqualifications are permanent — for example, a second DUI conviction within ten years results in a lifetime CDL ban.

If you believe the scan contains an error — such as a violation that was dismissed or a medical card that was renewed but not yet updated in the system — contact your state's DMV to request a correction. Provide documentation and ask for a written confirmation once the error is fixed. You can then share this confirmation with your employer.

Differences in CDL scan requirements across states

All states participate in the CDLIS database, so a scan will pull the same core information regardless of which state runs it. However, states differ in how often they require employers to run scans and what violations they consider disqualifying beyond the federal minimum.

Some states impose stricter rules on medical certification — for example, requiring employers to verify medical status monthly rather than annually. Other states have additional violations that trigger automatic disqualification or suspension. Check your state's DMV website or your employer's policy to understand the specific scan frequency and standards that explore to you.

If you hold a CDL in one state but work in another, the scan will still pull your record from your home state. However, violations you receive in any state are reported to your home state's DMV and will appear in future scans.

Frequently Asked Questions

Can I see what a CDL scan shows about me?

Yes. You can request a certified copy of your driving record from your state's DMV. This shows the same information that appears in a CDLIS scan — your license status, violations, medical certification, and endorsements. The DMV can provide this within one to two weeks for a small fee.

How often do employers run CDL scans?

Federal law requires employers to verify your CDL status before hiring. Many employers also run periodic scans during employment, typically every three to twelve months, though frequency varies by company and state. Some states mandate minimum scan frequencies; check your employer's policy or your state's DMV for specifics.

Will a speeding ticket show up in a CDL scan?

It depends on the speed. A minor speeding violation (under 10 miles per hour over the limit) may not appear as a major violation. However, speeding 15 miles per hour or more over the limit is a major violation and will show in the scan. Your employer may use it to make hiring or employment decisions.

What do I do if my medical card expires?

Schedule an appointment with a DOT-certified medical examiner when ready. Your medical card must be valid to operate a commercial vehicle legally. If your card expires while you are employed, notify your employer right away — you cannot drive commercially until you renew it. Once renewed, the DMV updates your record, and the new status will appear in the next scan.

Can a CDL scan show violations from other states?

Yes. The CDLIS database is national, and all states report violations to it. If you receive a violation in any state, it is reported to your home state's DMV and will appear in your CDLIS record. A scan will show violations from any state where you have driven.