Where to find your known traveler number online

Your known traveler number (KTN) is stored in the TSA's system once you enroll in PreCheck or CLEAR. The fastest way to retrieve it is to log into your account on the official TSA website at tsa.gov. Go to "Manage Benefits" and select the program you enrolled in — your KTN will appear on that page. If you enrolled online, the same username and password you created during enrollment will work.

If you enrolled in person at a TSA PreCheck enrollment center or CLEAR kiosk, you can still use the same login. The system sends you a confirmation email with your KTN shortly after approval, so check your email inbox and spam folder for messages from TSA or CLEAR. That email is often easier to find than logging in.

Key Takeaways

  • Your KTN appears in your account on tsa.gov under "Manage Benefits" once your enrollment is approved.
  • The TSA sends your KTN by email after approval, so search your inbox for messages from TSA or CLEAR.
  • If you cannot find your email or remember your password, you can reset your password on tsa.gov or call the TSA at 855-347-8371.
  • Your KTN is a four-digit or longer code that you enter when booking flights or at airport security.

Checking your email confirmation

The TSA sends a confirmation email within a few days of your enrollment being approved. This email contains your KTN, your membership number, and your membership expiration date. Search your email for messages from "tsa.gov" or "tsa@tsa.dhs.gov" and look for subject lines that say "TSA PreCheck Enrollment Confirmation" or "CLEAR Membership Confirmation."

If you cannot find the email, check your spam or promotions folder — confirmation emails sometimes land there by mistake. If you still cannot locate it, you can request a new confirmation email by logging into your account on tsa.gov and selecting "Resend Confirmation Email" or a similar option.

Resetting your password if you are locked out

If you do not remember the password you created during enrollment, go to tsa.gov and click "Forgot Password" on the login page. Enter the email address you used to enroll, and the TSA will send you a link to reset it. Follow the link in that email to create a new password, then log in to view your KTN.

If you do not have access to the email address you enrolled with, call the TSA at 855-347-8371. The phone 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 identification ready — the TSA will verify your identity before sharing your KTN over the phone.

What to do if you never received a confirmation

If your enrollment was approved but you never received a confirmation email, log into your account on tsa.gov and check the status of your enrollment. If it shows "Approved," your KTN should be visible in your account even if the email did not arrive. Write down the number from your account page.

If your enrollment status shows "Pending" or "Denied," you will not have a KTN yet. A pending status means the TSA is still reviewing your process — this can take several weeks. A denied status means you were not approved; the TSA will send a separate email explaining why, usually within a few days of the denial.

Using your KTN when you book a flight

Once you have your KTN, enter it in the "Known Traveler Number" field when you book a flight online. Most airline websites have this field on the passenger information page. If you book by phone or through a travel agent, give them your KTN and tell them whether it is for TSA PreCheck or CLEAR.

Your KTN must be in the airline's system before you check in at the airport for it to work at security. If you forget to add it during booking, you can usually add it to your reservation afterward through your airline account or by calling the airline. Check in at least 24 hours before your flight to make sure the KTN is linked to your boarding pass.

Checking your membership expiration date

Your KTN is only active while your membership is current. Log into tsa.gov and go to "Manage Benefits" to see when your PreCheck or CLEAR membership expires. TSA PreCheck is valid for five years; CLEAR is valid for one year. Both programs send you a reminder email about 60 days before expiration.

If your membership has expired, you will need to renew it to use your KTN again. The renewal process is the same as the initial enrollment — you can do it online or in person at a TSA PreCheck enrollment center. Once you renew, you will receive a new KTN, which you should update in your airline profiles.

Frequently Asked Questions

What if I have both TSA PreCheck and CLEAR — do I have two different KTNs?

Yes, each program has its own KTN. PreCheck and CLEAR are separate memberships with separate numbers. When you book a flight, you can enter both numbers in the appropriate fields, or just the one for the program you want to use at that airport.

Can I look up someone else's KTN?

No. Your KTN is private information tied to your account. Only you can view it by logging into tsa.gov with your own credentials. The TSA will not share another person's KTN over the phone or email.

What if my KTN is not working at the airport?

Make sure your KTN was entered correctly when you booked your flight and that it appears on your boarding pass. If it does not appear on your boarding pass, tell the TSA officer at security — they can look up your membership in the system using your ID. If your membership has expired, you will not be able to use PreCheck or CLEAR benefits until you renew.

Is my KTN the same as my membership number?

No, they are different. Your KTN is what you enter when booking flights. Your membership number is used for account management and customer service. Both appear in your confirmation email and in your account on tsa.gov.