Where to find your TSA PreCheck number online

Your TSA PreCheck number lives in your account on the official TSA website at universalenroll.dhs.gov. Log in with the same username and password you created when you enrolled, then look for your Known Traveler Number (KTN) — that is your TSA PreCheck number. It appears on your account dashboard, usually near the top of the page after you log in.

If you cannot remember your login details, use the "Forgot Username" or "Forgot Password" link on the login page. You will need the email address you registered with and may be asked to answer security questions or verify your identity through your phone number.

The number itself is nine characters long and looks like a mix of letters and numbers. Write it down or take a screenshot — you will need it when you book flights or check in at the airport.

Key Takeaways

  • Your TSA PreCheck number is your Known Traveler Number (KTN), found by logging into universalenroll.dhs.gov with your enrollment account credentials.
  • The number is nine characters long and appears on your account dashboard after you log in successfully.
  • If you forgot your login information, use the password or username recovery links on the TSA enrollment website.
  • You can also find your number on your physical TSA PreCheck card, printed on the front in the lower right corner.

Check your physical TSA PreCheck card

If you have your TSA PreCheck card in front of you, your number is printed directly on it. Look at the front of the card in the lower right corner — you will see a nine-character code. That is your Known Traveler Number.

Your card was mailed to you after your enrollment was approved. If you cannot find the card or it has been damaged, you can still access your number through your online account at universalenroll.dhs.gov.

What to do if you cannot log into your account

Start with the password reset option on universalenroll.dhs.gov. Click "Forgot Password," enter the email address you used to enroll, and follow the link sent to your inbox. If you do not receive an email within a few minutes, check your spam folder.

If you cannot reset your password or do not remember which email you used, you may need to create a new account. However, before you do that, try the "Forgot Username" option — it may help you recover your original account. If neither works, contact the TSA directly through their website or call the TSA PreCheck customer service line. They can verify your identity and help you regain access to your account.

Where to enter your TSA PreCheck number when booking

When you book a flight on an airline website or through a travel booking service, there is usually a field for your Known Traveler Number during checkout. It is often labeled "KTN," "TSA PreCheck Number," or "Frequent Traveler Number." Enter your nine-character number exactly as it appears.

If you do not see a field for it during booking, you can add it to your airline profile after you purchase your ticket. Most airlines let you manage your frequent traveler information in your account settings. Adding it before you check in at the airport ensures the TSA PreCheck benefit is linked to your boarding pass.

How to add your number at airport check-in

If you forgot to add your TSA PreCheck number when you booked, you can still add it at the airport. When you check in at the ticket counter or kiosk, tell the agent your number or provide it on the form they give you. They can add it to your reservation and print it on your boarding pass.

If you are checking in online or through a mobile app, look for an option to add or update your frequent traveler information before you arrive at the airport. This is faster than doing it in person and reduces the chance you will forget.

What happens if you lose your card

Your TSA PreCheck membership does not end if your card is lost or damaged. Your enrollment is still active, and your Known Traveler Number is still valid. You can use your number at the airport even without the physical card — just provide it to the TSA agent or airline staff when you check in.

If you want a replacement card, log into your account at universalenroll.dhs.gov and request one. There is usually a small fee for a replacement card, though the exact cost varies. The new card will arrive by mail within a few weeks. In the meantime, your number works just as well.

Frequently Asked Questions

Can I look up someone else's TSA PreCheck number?

No. Your TSA PreCheck number is tied to your account and is only visible when you log in with your own credentials. You cannot look up another person's number, and the TSA will not provide it over the phone or email for privacy reasons.

What if my TSA PreCheck number is not showing up on my boarding pass?

Make sure you entered it correctly when you booked your flight — a single wrong character will cause it not to match. If it was entered correctly, contact your airline before you go to the airport. They can verify that the number is linked to your reservation and reprint your boarding pass if needed.

Is my TSA PreCheck number the same as my confirmation number?

No. Your confirmation number is a code the airline gives you when you book a flight. Your TSA PreCheck number (Known Traveler Number) is a permanent nine-character code tied to your TSA PreCheck membership. They are separate and serve different purposes.

How long does my TSA PreCheck number stay the same?

Your number stays the same for the entire five-year period of your TSA PreCheck membership. When your membership expires and you renew, you may receive a new number, though the TSA sometimes keeps the same one. Check your account or new card after renewal to confirm.