Where to find your TSA PreCheck number online

Your TSA PreCheck number is in your email confirmation from TSA, on the official TSA website using your login, or in the TSA mobile app. The fastest route is the TSA website at tsa.gov — sign in with the same username and password you created when you enrolled, and your Known Traveler Number (KTN), which is your PreCheck number, appears on your account dashboard under "Active Memberships" or "My TSA PreCheck."

If you enrolled in person at an enrollment center, you received a confirmation email when ready after your appointment. That email contains your nine-digit PreCheck number. Search your email inbox for messages from tsa.gov or PreCheck enrollment confirmation. If you cannot find the email, check your spam folder or use your email provider's search function to look for "TSA" or "PreCheck."

The TSA mobile app, available on iOS and Android, also displays your PreCheck number once you log in. Open the app, sign in with your credentials, and your KTN appears on the main screen or under your membership details. This method works offline, so you can access your number at the airport even without cell service.

Key Takeaways

  • Your PreCheck number is a nine-digit Known Traveler Number (KTN) that appears on your TSA account dashboard at tsa.gov after you log in.
  • Your enrollment confirmation email from TSA contains your PreCheck number and is the fastest place to look if you enrolled recently.
  • The TSA mobile app displays your PreCheck number on the main screen once you sign in with your account credentials.
  • You need your PreCheck number when you book a flight to add it to your reservation so TSA can identify you at security.

How to access your account on the TSA website

Go to tsa.gov and select "Sign In" in the upper right corner. You will be taken to a login page where you enter the username and password you created during your PreCheck enrollment. If you do not remember your password, select "Forgot Password" and follow the prompts to reset it using your email address.

Once you are logged in, your dashboard displays your active memberships. Look for the section labeled "My TSA PreCheck" or "Active Memberships." Your nine-digit Known Traveler Number is listed there. Write it down or take a screenshot — you will need it when you book flights or add PreCheck to an existing reservation.

If you see a message that says your account does not exist or your membership is not found, you may have enrolled under a different email address or username. Try logging in with an alternate email, or contact the TSA PreCheck enrollment center where you applied. They can confirm your enrollment status and resend your number.

What to do if you cannot find your confirmation email

Check your email spam, promotions, or other filtered folders first. TSA confirmation emails sometimes land in these sections instead of your inbox. Search for emails from tsa.gov, precheck@tsa.gov, or any message containing "PreCheck" or "Known Traveler Number."

If the email is not in any folder, log into your TSA account at tsa.gov and retrieve your number from your dashboard. Your PreCheck number is stored in your account regardless of whether you have the confirmation email. If you cannot log in, use the "Forgot Password" option to reset your credentials and access your account.

As a last resort, contact the TSA PreCheck enrollment center where you completed your process. They can look up your enrollment record by name and date of birth and provide your PreCheck number over the phone or email. Have your ID and enrollment appointment date ready when you call.

Adding your PreCheck number to flight reservations

Once you have your PreCheck number, add it to your airline reservation so TSA can identify you at security. When you book a flight online, most airlines ask for your Known Traveler Number (KTN) during checkout. Enter your nine-digit PreCheck number in that field. If the airline does not ask during booking, log into your reservation after purchase and add it to your passenger profile.

You can also add your PreCheck number to your frequent flyer account with your airline. Once it is saved there, the airline automatically adds it to every flight you book under that account. This saves time on repeat bookings and reduces the chance of forgetting to enter it.

If you already booked a flight without adding your PreCheck number, contact the airline or log into your reservation and edit your passenger information to add it. Changes can usually be made up to 24 hours before departure, though some airlines allow changes closer to your flight time.

Understanding your Known Traveler Number format

Your TSA PreCheck number is always nine digits long and is also called your Known Traveler Number or KTN. It looks like this: 123456789. Some airlines and TSA systems may refer to it as your "PreCheck number," "TSA PreCheck ID," or "KTN" — these all mean the same thing.

Do not confuse your PreCheck number with your passport number, driver's license number, or TSA ID card number. Your PreCheck number is unique to your PreCheck membership and is used only for security screening purposes. Keep it separate from other identification numbers.

Your PreCheck number remains the same for the entire five-year length of your membership. You do not need to renew or update it unless you renew your PreCheck membership, in which case TSA will issue a new number when your renewal is processed.

Troubleshooting login and account access issues

If you cannot log into your TSA account, first confirm you are using the correct email address and password. Try resetting your password by selecting "Forgot Password" on the login page. TSA will send a password reset link to your email address. Follow the link and create a new password.

If you receive an error message saying your account does not exist, you may have enrolled under a different email address than the one you are trying now. Try logging in with any other email addresses you use regularly. If that does not work, you may not have completed your enrollment. Check your email for a message asking you to finish your process or schedule an in-person appointment.

If you have tried multiple email addresses and passwords and still cannot access your account, contact the TSA PreCheck program directly. You can reach them through the TSA website contact form or call the enrollment center where you applied. Have your full name, date of birth, and the email address you believe you used to enroll.

Frequently Asked Questions

What if I lost my PreCheck number and cannot access my email or TSA account?

Contact the TSA PreCheck enrollment center where you completed your process. Provide your full name and date of birth, and they can look up your enrollment record and give you your PreCheck number. You can find your enrollment center's phone number on the TSA website under "Contact Us."

Can I use my PreCheck number if my membership has expired?

No. Your PreCheck number is only valid during your active membership period. If your membership has expired, you must renew it before you can use PreCheck at security. You can renew online at tsa.gov or at an enrollment center. Once renewed, you will receive a new PreCheck number.

Do I need to print my PreCheck number or show it on my phone at the airport?

No. TSA does not require you to print or display your PreCheck number at the airport. As long as your PreCheck number is added to your airline reservation, TSA can see it in their system when you check in. Your boarding pass may display your PreCheck status, but it is not required.

Is my PreCheck number the same as my TSA ID card number?

No. Your PreCheck number is your Known Traveler Number used for flight reservations. Your TSA ID card number is different and appears on the back of your physical PreCheck card if you requested one. Use your PreCheck number (KTN) when booking flights, not your card number.

What should I do if someone asks for my PreCheck number over the phone or email?

Be cautious. TSA and airlines will never ask for your PreCheck number unsolicited. If someone contacts you claiming to be from TSA or your airline asking for this information, it may be a scam. Hang up or delete the message and contact TSA or your airline directly using the phone number on their official website.