Where Your TSA PreCheck Number Appears

Your TSA PreCheck number is printed on your Known Traveler Number (KTN) card, which TSA mails to you after your background check clears. The number is a 10-digit code that appears on the front of the card, usually in the upper right corner. If you have the physical card in front of you, that's the fastest way to find it.

If you've misplaced the card, you can find the same number through your TSA account online or by contacting TSA directly. The number stays the same for the entire five-year validity period of your membership, so once you locate it, you can save it for future flights.

Key Takeaways

  • Your TSA PreCheck number is a 10-digit code printed on the front of your Known Traveler Number card that TSA mails after approval.
  • You can retrieve your number by logging into your TSA PreCheck account at tsa.gov/precheck with your email and password.
  • If you don't have an online account, you can call the TSA PreCheck customer service line at 1-855-347-8371 to request your number.
  • Airlines and booking websites ask for this number when you purchase tickets so TSA can flag your reservation for expedited screening.

Checking Your TSA Account Online

The easiest way to find your number without the physical card is through the TSA PreCheck website. Go to tsa.gov/precheck and select "Sign In" in the upper right corner. Enter the email address you used when you enrolled and your password.

Once you're logged in, your dashboard will display your membership details, including your 10-digit TSA PreCheck number. You can take a screenshot, write it down, or straightforward read it aloud to an airline agent. The number is also listed on any confirmation emails TSA sent you after your enrollment was approved.

Calling TSA Customer Service

If you don't have an online account or can't remember your login information, call TSA PreCheck customer service at 1-855-347-8371. The line is open 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 driver's license or passport number ready when you call.

A representative will verify your identity using information from your enrollment process and then provide your 10-digit number over the phone. This process typically takes five to ten minutes. If you're calling close to your flight, have a pen ready to write down the number when ready.

Finding It on Your Airline Reservation

If you've already booked a flight and entered your TSA PreCheck number at purchase, you can find it again by logging into your airline account. Most airlines display your KTN in the "Manage My Booking" or "Trip Details" section of their website or app. Look for a field labeled "Known Traveler Number" or "TSA PreCheck Number."

This is helpful if you remember entering the number but can't locate your card or TSA account. The number shown in your airline reservation is the same 10-digit code you'll need for all future flights.

What to Do If You Never Received Your Card

TSA typically mails your Known Traveler Number card within two weeks of approval. If more than three weeks have passed since you received your approval email and the card hasn't arrived, log into your TSA account and check the "My Account" section for your number. You can use this number when ready for flights even if the physical card is still in the mail.

If you still don't see a number in your account after three weeks, contact TSA customer service at 1-855-347-8371. They can confirm whether your card was mailed and provide your number directly. You don't need to wait for the physical card to start using TSA PreCheck at the airport.

Using Your Number When You Book Flights

When you purchase airline tickets online or over the phone, you'll see a field asking for your Known Traveler Number. Enter your 10-digit TSA PreCheck number exactly as it appears on your card or in your TSA account. Some airlines call this field "TSA PreCheck," "KTN," or "Known Traveler Number"—they all mean the same thing.

Entering the number correctly ensures TSA can match it to your reservation and flag you for expedited screening. If you enter it incorrectly or leave it blank, you won't receive TSA PreCheck benefits on that flight, even though you have an active membership. Double-check the number before you complete your booking.

Frequently Asked Questions

What if I lost my TSA PreCheck card?

You don't need the physical card to use TSA PreCheck. Your 10-digit number is all you need—you can find it through your TSA account online or by calling customer service. Enter the number when you book your flight, and TSA will recognize you at the airport. You can request a replacement card through your TSA account if you want a physical copy.

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

No. Your TSA PreCheck number is a 10-digit code that stays the same for five years. Your confirmation number is a separate code TSA sends when you enroll, and your airline confirmation number is different again. The TSA PreCheck number is the one you enter when booking flights.

Can I use someone else's TSA PreCheck number?

No. Your TSA PreCheck number is tied to your identity and background check. Using someone else's number is fraud and can result in serious penalties. Each person must enroll separately and receive their own number.

What if my TSA PreCheck number doesn't work at the airport?

First, confirm you entered it correctly when booking your flight. If it was entered correctly, tell a TSA officer at security that you have an active TSA PreCheck membership. They can look up your account using your ID. If there's a problem with your membership status, contact TSA customer service before your next flight.