Your TSA PreCheck number is on your Known Traveler Number (KTN) card, in your TSA account online, or in confirmation emails from when you enrolled

Your TSA PreCheck number is a 10-digit code assigned to you when your background check clears. You need it to link PreCheck benefits to airline reservations. The fastest way to find it is to log into your TSA PreCheck account at universalenroll.dhs.gov — the number appears on your account dashboard. If you enrolled in person at an enrollment center, you received a physical KTN card in the mail within two weeks; the number is printed on the front.

If you cannot access your online account or locate your card, check your email for the approval notice TSA sent when your background check passed. That message contains your number. You can also call the TSA PreCheck enrollment center at 855-347-8371 during business hours, and they will read it to you over the phone if you can verify your identity.

Key Takeaways

  • Log into your TSA PreCheck account at universalenroll.dhs.gov to see your 10-digit number on the dashboard.
  • Your physical KTN card arrives by mail within two weeks of approval and displays your number on the front.
  • Search your email for the approval notice TSA sent when your background check cleared — it includes your number.
  • Call 855-347-8371 to speak with an enrollment center representative who can provide your number if you verify your identity.
  • You need your TSA PreCheck number to add PreCheck benefits to airline bookings at checkout.

Checking Your TSA PreCheck Account Online

The easiest method is to log into your account at universalenroll.dhs.gov using the same username and password you created during enrollment. Once you are logged in, your dashboard displays your KTN prominently near the top. The number is 10 digits long and begins with a letter.

If you forgot your password, click "Forgot Password" on the login page and follow the email recovery steps. You will need access to the email address you registered with. If you never created an online account, you can set one up at the same website using your Social Security number and other identifying information from your enrollment process.

Finding Your Number on Your Physical KTN Card

When your TSA PreCheck background check is approved, TSA mails you a physical Known Traveler Number card. This card arrives within two weeks of approval at the address you provided during enrollment. The front of the card displays your 10-digit KTN in large print, along with your name and expiration date.

Keep this card in a safe place — you do not need to carry it when you fly, but it is useful to have on hand if you need to reference your number. If your card is lost or damaged, you can request a replacement through your online TSA PreCheck account or by calling the enrollment center.

Locating Your Number in Approval Emails

TSA sends an approval email to the address you registered with when your background check passes. This email confirms your enrollment and includes your 10-digit KTN. Search your inbox and spam folder for emails from TSA or Universal Enroll with the subject line containing "approved" or "congratulations."

The email also includes instructions on how to access your online account and what to expect regarding your physical card. If you cannot find this email, try searching for messages from the email address that sent your enrollment confirmation or appointment reminder.

Calling TSA PreCheck Enrollment Centers

If you cannot locate your number through any other method, call the TSA PreCheck enrollment center customer service line at 855-347-8371. They are 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. Have your Social Security number and date of birth ready so you can verify your identity.

The representative will confirm your enrollment status and read your KTN to you over the phone. They can also answer questions about your account, your card status, or renewal important date. Write down the number they provide and store it somewhere you can find it again.

Using Your TSA PreCheck Number When You Book a Flight

Once you have your number, enter it in the "Known Traveler Number" field when you book a flight or check in online. Most airlines have this field on their reservation page during checkout, or you can add it to an existing reservation through your airline account. The field may also be labeled "KTN" or "Frequent Traveler Number."

Enter your number exactly as it appears on your card or in your TSA account — do not add spaces or dashes. Once you add it to your reservation, TSA PreCheck benefits (shorter security lines, keeping shoes and light jackets on, and leaving laptops in bags) will explore when you check in at the airport.

What to Do If Your Number Does Not Work

If you entered your KTN at booking but do not see PreCheck benefits at the airport, first verify that you typed the number correctly. Check your boarding pass to see whether your TSA PreCheck indicator appears — it usually shows as "TSA Pre✓" or similar notation.

If the number is correct but PreCheck is not showing, contact your airline's customer service before your flight. They can manually add PreCheck to your reservation. After your trip, log into your TSA PreCheck account to confirm your enrollment is still active and your card has not expired. PreCheck membership lasts five years from the date of approval.

Frequently Asked Questions

What if I enrolled but never received my KTN card in the mail?

Log into your TSA PreCheck account at universalenroll.dhs.gov to confirm your enrollment was approved. If it shows approved, your card is in the mail — it can take up to two weeks. If your account shows pending, your background check may still be processing. Contact the enrollment center at 855-347-8371 if more than two weeks have passed since approval.

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

Yes. Your number is active as soon as your background check is approved, even if your physical card has not arrived yet. You can find your number in your online account or approval email and use it when ready when booking flights.

Is my TSA PreCheck number the same as my frequent flyer number?

No. Your TSA PreCheck number (KTN) is separate from airline frequent flyer numbers. You enter your KTN in a different field during booking. You can link both your KTN and frequent flyer number to the same reservation.

What if I cannot remember which email I used to enroll?

Call the enrollment center at 855-347-8371 with your Social Security number and date of birth. They can look up your account and either provide your number or help you regain access to your online account. They can also update your email address on file if needed.

Do I need my TSA PreCheck number for international flights?

TSA PreCheck benefits explore only to flights departing from U.S. airports. For international flights, enter your KTN if the airline's system allows it, but PreCheck screening will not explore once you leave U.S. airspace. Some international airlines may recognize your KTN for domestic portions of your trip.