Where to find your TSA PreCheck number

Your TSA PreCheck number is in your email confirmation from the TSA, on your Known Traveler Number (KTN) card if you received a physical one, or in your TSA account online. The fastest way to locate it is to log into your account at tsa.gov using the same email address you registered with. Once logged in, your 10-digit PreCheck number appears on your account dashboard under "Active Memberships" or "My Benefits."

If you cannot find your email confirmation, check your spam or promotions folder — TSA confirmation emails sometimes get filtered. The confirmation email contains your KTN in the subject line or body. If you still cannot locate it, you can request a replacement card or retrieve your number by calling the TSA at 1-855-347-8371 during business hours.

Key Takeaways

  • Your TSA PreCheck number is a 10-digit code found in your TSA account at tsa.gov, your confirmation email, or on your physical KTN card.
  • Log into tsa.gov with the email address you used when you enrolled to see your active membership and PreCheck number when ready.
  • If you lost your confirmation email, check your spam folder or call 1-855-347-8371 to retrieve your number by phone.
  • You need your PreCheck number when booking flights; enter it in the "Known Traveler Number" field during check-in to access expedited screening.

Checking your account on the TSA website

Go to tsa.gov and select "Sign In" in the upper right corner. Enter the email address and password you created when you enrolled in PreCheck. If you forgot your password, click "Forgot Password" and follow the reset instructions sent to your email.

Once you are logged in, look for a section labeled "My Memberships," "Active Benefits," or "My Account." Your PreCheck number will display as a 10-digit code next to your membership status. The page also shows your membership expiration date — PreCheck is valid for five years from your enrollment date. If your membership has expired, you will see an option to renew on the same page.

Using your PreCheck number when you book a flight

When you purchase a plane ticket online or at the airport, the airline will ask for your Known Traveler Number (KTN). This is where you enter your TSA PreCheck number. Entering it correctly ensures you are flagged for expedited screening at security, which means you can keep your shoes, belt, and light jacket on, and leave your laptop and liquids in your bag.

Enter your PreCheck number exactly as it appears in your TSA account — all 10 digits with no spaces or dashes. If you book through a travel website like Expedia or Kayak, look for a field labeled "Frequent Traveler Number," "KTN," or "PreCheck Number" during the passenger information step. If you forget to add it when booking, you can usually update it in your airline account before you check in.

What to do if you cannot locate your number

If you have searched your email thoroughly and cannot log into your TSA account, call the TSA at 1-855-347-8371. Have your driver's license or passport ready. The TSA representative will verify your identity and provide your PreCheck number over the phone. This process usually takes fewer than five minutes.

If you enrolled in PreCheck more than five years ago, your membership may have expired. The TSA will tell you this during the call. You can renew your membership online at tsa.gov or in person at a PreCheck enrollment center. Renewal is faster than the initial enrollment and costs less.

Retrieving a replacement KTN card

If you received a physical KTN card when you enrolled and have lost it, you do not need to replace it to use PreCheck. Your PreCheck number is what matters — the card is optional. However, if you want a replacement card, log into your TSA account and look for a "Request Replacement Card" or "Order Card" option. Some enrollment centers will also print a replacement on the spot if you visit in person.

The replacement card is mailed to the address on file and typically arrives within two to three weeks. In the meantime, you can use your PreCheck number by entering it in the KTN field when you book your flight.

Confirming your PreCheck is active before you travel

Before you head to the airport, log into your TSA account one more time to confirm your membership status shows as "Active" and your expiration date has not passed. This takes 30 seconds and prevents surprises at security. If your membership expired, you will not receive expedited screening even if you enter your old PreCheck number.

When you arrive at the airport, look for the TSA PreCheck lane at security — it is usually marked with a blue sign. Present your boarding pass and ID. The TSA agent will scan your boarding pass to confirm your PreCheck status is linked to that flight. If everything matches, you will proceed through the expedited line.

Frequently Asked Questions

What if I do not remember the email I used to enroll in PreCheck?

Call the TSA at 1-855-347-8371 with your driver's license or passport. The representative can look up your account using your name and date of birth, then tell you which email is on file or help you reset it. You can then log in and retrieve your PreCheck number.

Can I use my PreCheck number if my membership expired?

No. If your membership has expired, your PreCheck number will not work at security, and you will be screened as a regular passenger. You can renew your membership online at tsa.gov or at an enrollment center. Renewal takes about 10 minutes and costs less than initial enrollment.

Do I need the physical KTN card to use PreCheck?

No. Your PreCheck number is all you need. Enter it in the Known Traveler Number field when you book your flight, and the TSA will flag you for expedited screening. The physical card is a backup reference, but it is not required.

What if my PreCheck number does not work at the airport?

First, confirm your membership is active by logging into your TSA account. If it is active, tell the TSA agent at security that your PreCheck number should be linked to your boarding pass. They can manually verify it. If your membership has expired, you will need to renew before you can use PreCheck benefits.