Your TSA PreCheck number is on your Known Traveler Number (KTN) card, in your email confirmation, or in your TSA account online

When you completed TSA PreCheck, you received a 10-digit number that identifies you in the TSA system. This number appears on the physical card mailed to you, in the confirmation email sent after you paid and were approved, and in your account on the official TSA website. The fastest way to find it depends on what you still have from your enrollment.

You will need this number when you book flights, check in at the airport, or use TSA PreCheck lanes. Airlines also ask for it during online check-in so they can flag your reservation with your PreCheck status. If you cannot locate it through the methods below, the TSA can look it up for you using your name and date of birth.

Key Takeaways

  • Your TSA PreCheck number is a 10-digit code that appears on your physical card, in your enrollment confirmation email, and in your TSA account online.
  • The TSA website at tsa.gov/precheck lets you log in with your email and password to view your number and card status.
  • If you lost your card or email, you can call the TSA at 1-855-347-8371 and provide your name and date of birth to retrieve your number.
  • When you book a flight, enter your TSA PreCheck number in the "Known Traveler Number" field during reservation to receive PreCheck benefits.

Check your physical TSA PreCheck card

The card mailed to you after approval is the simplest source. Your 10-digit TSA PreCheck number is printed on the front of the card, usually in the upper right corner. The card is valid for five years from the issue date, which also appears on the card.

If you have the card but cannot read the number clearly, hold it under good light or take a photo with your phone's camera. The number should be crisp and straightforward to read. If the card is damaged or the number is worn away, contact the TSA to request a replacement.

Look in your enrollment confirmation email

When the TSA approved your PreCheck process, they sent a confirmation email to the address you provided during enrollment. This email contains your 10-digit TSA PreCheck number and tells you that your card is being mailed. Search your email inbox for messages from tsa.gov or look for subject lines that say "TSA PreCheck Enrollment Confirmation" or "Your TSA PreCheck process."

Check your spam or promotions folder if you cannot find it in your inbox — confirmation emails sometimes land there. If you changed email addresses since you enrolled, you may not have access to that original message. In that case, use your TSA account online or call the TSA directly.

Log into your TSA PreCheck account online

Visit tsa.gov/precheck and click the link to manage your account. You will need the email address and password you created when you enrolled. Once you log in, your dashboard shows your TSA PreCheck number, card status, and expiration date.

If you forgot your password, use the "Forgot Password" link on the login page. The TSA will send a reset link to your email. If you do not remember the email address you used to enroll, you will need to call the TSA instead.

Call the TSA to look up your number

The TSA PreCheck customer service line is 1-855-347-8371. Have your name, date of birth, and the state where you enrolled ready. The representative will search their system and provide your 10-digit number over the phone. This call is free and usually takes less than five minutes.

Customer service is available Monday through Friday, 8 a.m. to 10 p.m. Eastern time, and Saturday and Sunday, 9 a.m. to 8 p.m. Eastern time. Wait times are shortest early in the morning or late in the afternoon. If you are calling from outside the United States, check the TSA website for international calling options.

Enter your number when you book a flight

Once you have your TSA PreCheck number, add it to your airline reservation so you receive PreCheck benefits. During online booking, look for a field labeled "Known Traveler Number" or "KTN." Enter your 10-digit number exactly as it appears on your card or in your TSA account. Some airlines place this field on the main booking page; others hide it under "Frequent Flyer" or "Special Services."

If you already booked a flight without entering your number, you can usually add it during online check-in, which opens 24 hours before departure. Adding your number after booking does not change your ticket price or require you to rebook. When your number is correctly linked, your boarding pass will show "TSA PreCheck" or a TSA logo.

What to do if your card is lost or expired

If your card is lost, stolen, or damaged, contact the TSA at 1-855-347-8371 to request a replacement. Provide your name, date of birth, and the address where you want the new card mailed. A replacement card costs the same as a new enrollment and is valid for five years from the issue date.

If your card has expired, you must renew your TSA PreCheck enrollment. Visit tsa.gov/precheck to start the renewal process. You will pay the renewal fee and may need to visit an enrollment center for a new background check, depending on your situation. Until your new card arrives, you cannot use TSA PreCheck lanes, even if you have a valid number in the system.

Frequently Asked Questions

Can I use my TSA PreCheck number before my card arrives?

Yes. Your number is active as soon as the TSA approves your process, even if your physical card is still in the mail. You can enter your number in airline reservations and use TSA PreCheck lanes at the airport when ready. The card itself is just a backup form of identification.

What if the airline says my TSA PreCheck number is invalid?

Double-check that you entered the number correctly — it is 10 digits with no spaces or dashes. Make sure you are using your TSA PreCheck number, not your driver's license number or passport number. If the number is correct, contact your airline's customer service to confirm the number was added to your reservation. You may need to call the TSA to verify your number is active in their system.

Do I need my TSA PreCheck number at the airport if I have my card?

No. Your physical card is enough to use TSA PreCheck lanes. The TSA agent will scan or read your card at security. However, you still need to enter your number when you book flights so the airline knows to flag your reservation.

Can someone else use my TSA PreCheck number?

No. Your TSA PreCheck number is tied to your identity and background check. Only you can use it. If someone else tries to use your number, it will not work, and they may face questions from the TSA.

How long does it take to get a replacement card?

Replacement cards typically arrive within two to three weeks, though timing varies by location and current processing volume. Your number remains active while you wait, so you can still use TSA PreCheck at the airport without the physical card.