Where Your TSA PreCheck Number Lives

Your TSA PreCheck number is a nine-digit identifier printed on your Known Traveler Number (KTN) card, which TSA mails to you after you complete the in-person appointment and background check. The number appears on the front of the card in the upper right corner. If you have the physical card in front of you, that nine-digit code is what you need.

If you don't have the card nearby or it's been lost, your number is stored in the TSA's system and linked to your account. You can retrieve it through your TSA PreCheck account online, by calling TSA directly, or by checking your email confirmation from when you first enrolled.

Key Takeaways

  • Your TSA PreCheck number is the nine-digit code printed on the front of your Known Traveler Number card in the upper right corner.
  • You can find your number by logging into your TSA PreCheck account at tsa.gov/precheck, which shows your full enrollment details.
  • If you've lost your card or forgotten your number, call the TSA PreCheck customer service line at 1-855-347-8371 with your driver's license or passport information ready.
  • Your confirmation email from enrollment contains your TSA PreCheck number and can be searched in your email inbox if you saved it.
  • Airlines need your nine-digit number when you book a flight to link your reservation to your PreCheck status at security.

Checking Your TSA PreCheck Account Online

The fastest way to find your number is through your TSA PreCheck account. Go to tsa.gov/precheck and click "Sign In" in the upper right corner. You'll log in with the same username and password you created when you enrolled.

Once you're logged in, your dashboard displays your enrollment status and your nine-digit TSA PreCheck number. This page also shows your card's expiration date and lets you request a replacement card if yours is damaged or lost. The number on your screen is the same one you'll give to airlines when booking flights.

If you've forgotten your login credentials, click "Forgot Username" or "Forgot Password" on the sign-in page. TSA will send a reset link to the email address associated with your account, usually within a few minutes.

Calling TSA Customer Service for Your Number

If you prefer to speak with someone or don't have access to your online account, call the TSA PreCheck customer service line 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, passport, or state ID ready when you call. The representative will verify your identity using information from your enrollment record, then provide your nine-digit number over the phone. They can also tell you whether your card is still in the mail, if it's been delivered, or if you need to request a replacement.

Wait times are typically shorter on weekday mornings. If you reach a busy period, the system will offer to call you back at your number instead of holding.

Finding Your Number in Your Enrollment Email

When you completed your TSA PreCheck appointment, TSA sent a confirmation email to the address you provided during enrollment. This email contains your nine-digit TSA PreCheck number and your Known Traveler Number (KTN), which are the same thing.

Search your email inbox for messages from "tsa@tsa.dhs.gov" or search for the word "PreCheck" to locate the confirmation. If you can't find it, check your spam or promotions folder—sometimes confirmation emails land there by mistake. The email subject line usually says something like "TSA PreCheck Enrollment Confirmation" or "Your TSA PreCheck Number."

If you've changed email addresses since you enrolled and can't access the original confirmation, calling customer service is your best option.

What to Do If Your Card Is Lost or Damaged

If your physical card is lost or damaged but you still need your number, you don't have to wait for a replacement. Your nine-digit number remains active in TSA's system regardless of the card's condition. You can use the number when ready when booking flights—you don't need the physical card to enter it into the airline's system.

To request a replacement card, log into your TSA PreCheck account and select "Request a Replacement Card" from your dashboard. TSA will mail a new card to your address at no cost. Replacement cards typically arrive within two to three weeks. In the meantime, continue using your nine-digit number when you book travel.

Using Your Number When You Book a Flight

Once you have your nine-digit TSA PreCheck number, enter it in the "Known Traveler Number" field when you book your flight with any airline. This links your reservation to your PreCheck status so TSA knows you're enrolled when you arrive at security.

The field location varies by airline—some ask for it during the initial booking, others add it during check-in online or at the airport counter. If you forget to enter it at booking, you can usually add it later through your airline's website or mobile app by editing your reservation.

When you reach the security checkpoint, TSA will see your PreCheck status and direct you to the expedited security line, where you can keep shoes, belts, and light jackets on and leave laptops and liquids in your bag.

Frequently Asked Questions

Is my TSA PreCheck number the same as my Known Traveler Number?

Yes, they are the same nine-digit code. TSA uses both terms interchangeably. When airlines ask for your "Known Traveler Number" or "KTN," enter your TSA PreCheck number.

What if I can't log into my TSA PreCheck account?

Click "Forgot Username" or "Forgot Password" on the sign-in page at tsa.gov/precheck. TSA will email a reset link to your registered email address. If you still can't access your account, call customer service at 1-855-347-8371 and they can help you regain access or provide your number directly.

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

Yes. Your number is active when ready after your in-person appointment is complete and your background check clears. You don't need to wait for the physical card to arrive to start using your number when you book flights.

Do I need my TSA PreCheck number for domestic flights only?

TSA PreCheck applies to domestic flights within the United States. For international flights, you may be able to use your PreCheck status on the outbound leg if you're flying from a U.S. airport, but the returning international flight won't use PreCheck. Some international programs like Global Entry include TSA PreCheck benefits.