Where to find your TSA PreCheck number online

Your TSA PreCheck number is in your account on the TSA website. Go to tsa.gov, click "Manage My Reservation" in the top menu, and sign in with the same email and password you used when you enrolled. Your Known Traveler Number (KTN) — that is your TSA PreCheck number — appears on the confirmation page under your name and enrollment status.

If you do not remember your password, click "Forgot Password" on the login page. The TSA will send a reset link to the email address on file. Check your spam folder if you do not see it within a few minutes.

Your number is also printed on your physical TSA PreCheck card, which was mailed to you after you completed your enrollment appointment. The card shows a 10-digit alphanumeric code — that is your KTN.

Key Takeaways

  • Your TSA PreCheck number is a 10-digit code called your Known Traveler Number (KTN), found by logging into your account at tsa.gov.
  • The same number is printed on the physical TSA PreCheck card mailed to you after your enrollment appointment.
  • You need this number when you book flights so airlines know you have passed the TSA PreCheck screening.
  • If you lost your card or forgot your login details, the TSA website has recovery options for both.

What to do if you cannot log into your TSA account

If your password reset does not work, or if you do not remember the email address you used to enroll, contact the TSA directly. Call the TSA PreCheck customer service line at 1-855-347-8371, Monday through Friday, 8 a.m. to 10 p.m. Eastern time. Have your driver's license or passport ready — they will verify your identity and provide your number over the phone.

You can also visit a TSA PreCheck enrollment center in person. Bring a valid government-issued ID, and staff can look up your account and give you your number on the spot. Find the nearest center at tsa.gov under "Find an Enrollment Center."

Using your number when you book a flight

Enter your TSA PreCheck number in the Known Traveler Number field when you book your ticket online. This field is usually near the bottom of the passenger information section on airline websites. If you do not see it, look for a link that says "Add Known Traveler Number" or "TSA PreCheck."

You can also add your number to your airline frequent flyer profile so it fills in automatically on future bookings. Log into your airline account, go to your profile settings, and paste your KTN into the TSA PreCheck field. This saves time on repeat bookings.

If your card was lost or damaged

You do not need a physical card to use TSA PreCheck — your number is what matters. As long as your number is in the airline's system when you check in, you will get TSA PreCheck screening at the airport, even if your card is at home.

If you want a replacement card, log into your TSA account and look for a "Replace Card" or "Reorder Card" option. Some enrollment centers can print a replacement on the spot if you visit in person. There is usually a small fee for a replacement card, though the exact amount varies by state.

Checking your TSA PreCheck expiration date

Your TSA PreCheck membership lasts five years from the date you completed your enrollment appointment. You can see your expiration date in your TSA account under "My Reservation" or on the back of your physical card.

The TSA will send you an email reminder about 90 days before your membership expires. When it is time to renew, you can start a new enrollment through the TSA website. Renewal is usually faster than the first enrollment and may cost less.

What your TSA PreCheck number does and does not do

Your TSA PreCheck number tells airport security that you have passed a background check and are cleared for expedited screening. This means you can go through a faster security line, keep your shoes and belt on, and leave your laptop and liquids in your bag.

Your number does not may provide you will never be selected for additional screening — random checks still happen. It also does not work at every airport or on every flight, though most major U.S. airports and airlines honor it. International flights do not use TSA PreCheck; you would need a different program like Global Entry for those.

Frequently Asked Questions

Can I look up someone else's TSA PreCheck number?

No. Only the person enrolled in TSA PreCheck can access their own number through the TSA website. If you are booking a flight for someone else, ask them for their KTN directly. Airlines do not share this information.

What if I have TSA PreCheck but do not have my number memorized?

You do not need to memorize it. Log into your TSA account, check your email confirmation from enrollment, or look at your physical card. You can also call the TSA customer service line at 1-855-347-8371 and they will provide it after verifying your identity.

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

No, they are separate. Your TSA PreCheck number is your Known Traveler Number (KTN). Your frequent flyer number is your airline loyalty account number. You enter both when you book a flight, but they serve different purposes.

Can I use my TSA PreCheck number if I renew my driver's license?

Yes. Your TSA PreCheck number does not change when you renew your ID. It stays the same for the full five-year membership period, even if your driver's license or passport expires or is replaced.