Where to find your TSA PreCheck number

Your TSA PreCheck number is a nine-digit code printed on your Known Traveler Number (KTN) card, which you receive in the mail after your background check clears. The fastest way to find it is to look at the physical card itself — the number appears in the upper right corner. If you no longer have the card, you can retrieve the number from your TSA account online, through the TSA's customer service phone line, or by checking your airline reservation.

The number stays the same for the five-year life of your membership, so once you have it, you can save it in your phone or a password manager for future flights. You will need it every time you book a flight if you want TSA PreCheck screening at the airport.

Key Takeaways

  • Your TSA PreCheck number is printed on the physical KTN card you received by mail after your background check was approved.
  • If you cannot find your card, log into your TSA account at universalEnroll.dhs.gov to view your number in your profile.
  • You can also call the TSA at 1-855-347-8371 to have an agent look up your number using your name and date of birth.
  • Add your number to your airline profile so it automatically appears on your boarding pass, or enter it manually when you book each flight.

Checking your TSA account online

Go to universalEnroll.dhs.gov and sign in with your username and password. If you do not remember your login, use the "Forgot Username" or "Forgot Password" link on the homepage. Once you are logged in, your dashboard will show your membership status and your Known Traveler Number.

This method works whether your card is lost, damaged, or straightforward stored somewhere you cannot reach right now. The number displayed online is the same one printed on your physical card, so you can use it when ready for your next flight.

Calling TSA customer service

Phone the TSA at 1-855-347-8371 during business hours (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). Have your name, date of birth, and the email address you used to enroll ready. An agent will look up your membership and read your nine-digit number to you over the phone.

This is the slowest method if you need the number right away, since you have to wait for an available agent. However, it requires no password or online account access, so it works if you cannot log into your TSA account.

Finding it on your airline reservation

If you added your TSA PreCheck number when you booked your flight, it will appear on your airline confirmation email and in your online reservation. Log into your airline account, find the flight you booked, and look for a section labeled "Known Traveler Number," "KTN," or "TSA PreCheck." The number will be displayed there.

This method only works if you already entered the number during booking. If you did not add it then, you will need to use one of the other methods to retrieve it first, then add it to your reservation before you check in at the airport.

Adding your number to future bookings

Once you have your TSA PreCheck number, save it in your airline profile so it appears on every boarding pass you print. Log into your airline account, go to your profile or account settings, and look for a field labeled "Known Traveler Number" or "TSA PreCheck." Enter your nine-digit number and save. The next time you book a flight with that airline, the number will populate automatically.

You can also enter it manually at the time of booking if you prefer not to store it in your profile. Either way, the number must appear on your boarding pass for you to use the TSA PreCheck lane at security.

What to do if you cannot find your number

If your card is lost or you have forgotten your online password, the TSA account website and phone line are your fastest options. The online portal lets you reset your password in minutes, and the phone line can provide your number within the same business day. You do not need the physical card to use TSA PreCheck — the number is what matters at the airport.

If you have moved since you enrolled and never received your card, contact the TSA by phone with your name and date of birth. They can confirm whether the card was mailed and to what address, and they can provide your number when ready so you can use it on your next flight while you wait for a replacement card to arrive.

Frequently Asked Questions

Can I use my TSA PreCheck number if I lost my physical card?

Yes. The card is a convenience, but the nine-digit number is what you actually need. As long as your number appears on your boarding pass, you can use the TSA PreCheck lane at security. You do not need to show the physical card.

What if I forgot my password for the TSA website?

Click "Forgot Password" on the universalEnroll.dhs.gov login page. You will receive an email with a link to reset it. Follow the link and create a new password, then log in to view your number. This usually takes a few minutes.

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

Your Known Traveler Number (KTN) is your TSA PreCheck number — they are the same thing. It is the nine-digit code you enter when you book flights and the code that appears on your boarding pass.

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

No. Only the person who enrolled can view their own number through the TSA website or by calling customer service. You will need to provide your own name and date of birth to retrieve it.