You can find your TSA PreCheck number through the TSA KTN lookup tool, Trusted Traveler accounts, airline profiles, or past approval letters.
Losing track of your TSA PreCheck number usually happens on the one trip when you especially want that shorter security lane. Maybe you enrolled years ago, changed email accounts, or tossed the original approval letter. The number did not vanish, though. It sits in a few predictable places that you can reach with a bit of smart searching.
Start by matching how you enrolled with the most direct lookup path. Use this quick table as a map, then read the shorter sections that follow for more detail.
How Do You Find Your TSA Precheck Number? Step-By-Step
| How You Enrolled | Where To Look First | Good Match When |
|---|---|---|
| TSA PreCheck Application Program | Online KTN lookup and approval email or letter | You applied at an enrollment center or through a TSA partner |
| Global Entry | Back of Global Entry card and Trusted Traveler account | You use kiosks when you land from trips abroad |
| NEXUS | Back of NEXUS card and Trusted Traveler account | You cross the Canadian border by air or land on a regular basis |
| SENTRI | Back of SENTRI card and Trusted Traveler account | You cross the Mexican or Canadian border through SENTRI lanes |
| U.S. Military | DoD ID number on your official ID card | Your branch allows that number to act as your KTN |
| Employer Or Government Sponsorship | Internal travel portal or travel office records | Your organization paid the fee and handled enrollment |
| Stored With An Airline | Frequent flyer profile or past boarding passes | You remember seeing TSA PreCheck on at least one earlier trip |
Why Your TSA Precheck Number Matters For Every Flight
Your TSA PreCheck number, also called a Known Traveler Number or KTN, links your background check to each airline ticket. When the number, your full name, date of birth, and gender line up, your boarding pass shows the TSA PreCheck mark and agents send you through the faster screening lane.
If the KTN is missing, outdated, or typed in with even one wrong digit, the system treats you like a standard passenger. Shoes, belt, laptop, and liquids all come out of your bag again. Spending a few minutes to recover the number now saves many minutes at security lines over the life of your membership.
Finding Your TSA Precheck Number Across Different Programs
Many travelers type how do you find your tsa precheck number? into a search bar right before a trip. The answer depends on which program gave you the benefit in the first place. Work through the paths below until one of them turns up your KTN.
TSA PreCheck Application Program Members
If you enrolled directly in the TSA PreCheck Application Program, your number lives in that system. The easiest option is the official online TSA PreCheck Known Traveler Number lookup tool. Enter your legal name, date of birth, and country of birth exactly as you gave them during enrollment, then submit the form to see your KTN.
Global Entry, NEXUS, and SENTRI members do not receive a separate TSA PreCheck card. Instead, the nine digit PASSID printed on the back of each Trusted Traveler card doubles as the KTN. Flip the card over and read the number near the top; those digits are the ones you add to airline bookings.
Global Entry, NEXUS, And SENTRI Members
You can also log in to the official Trusted Traveler Programs website to see the same PASSID in your online account. Open the active membership and read the member number on the summary page. That number works as your KTN any time you book a flight that departs from a United States airport.
Military Travelers Using A DoD ID
Many members of the U.S. armed forces can use TSA PreCheck lanes when they enter their Department of Defense ID number in the Known Traveler field. In this case there is no added card or new number to learn. The DoD ID on the front of your common access card or other approved ID acts as your KTN for booking and check in.
Once you read the DoD ID, add it to the secure traveler section of each airline profile you use. Check one fresh booking with that airline to see that the TSA PreCheck mark appears on the boarding pass. If it does not, confirm with your branch that you fall under the groups listed as eligible for this perk.
Employer Or Government Sponsored Memberships
Once you have the number, treat it as your own. Store it in a secure note and add it to your personal airline accounts. That way you keep TSA PreCheck on leisure trips as well as work trips, even if you change jobs later.
Airline Profiles And Past Trips
Another shortcut is to look for your TSA PreCheck number inside airline systems. Sign in to each frequent flyer account you use, then open the profile or personal details page. Many airlines have a secure traveler, Known Traveler, or passenger information section where the KTN sits once you have entered it at least once.
Open the app or site for an airline you use often, sign in, and tap through to your profile. Look for headings such as passenger details, advanced passenger information, or secure traveler data. The KTN field usually sits near the redress number field, which many travelers confuse with it.
If you see your number there, copy it to a separate note. If the field is empty, you can paste a KTN you found through another method into this profile so later tickets carry the TSA PreCheck benefit automatically.
Practical Ways To Find Your TSA Precheck Number Online
Open the official KTN lookup page for the TSA PreCheck Application Program. Enter your full legal name, including any middle name, exactly as it appears on the ID you used at enrollment. Then enter your date of birth and country of birth, plus at least one contact method, and submit the form.
If the system finds a match, it shows your KTN on the screen and may send a copy by email or text as well. If it does not, check your spelling and try again. When that still fails, move on to the Trusted Traveler account method or the airline profile method, since you may have enrolled through a different program than you remember.
Steps For Using Your Trusted Traveler Account
To use your Trusted Traveler account, go to the login page, sign in, and choose the program that gave you Global Entry, NEXUS, or SENTRI. The dashboard shows your active memberships. When you click into one, the member details page lists your PASSID, which works as the KTN for TSA PreCheck.
Open the app or site for an airline you use often, sign in, and tap through to your profile. Look for headings such as passenger details, advanced passenger information, or secure traveler data. The KTN field usually sits near the redress number field, which many travelers confuse with it.
Steps For Recovering Your Number From Airline Profiles
If you see your number there, copy it to a separate note. If the field is empty, you can paste a KTN you found through another method into this profile so later tickets carry the TSA PreCheck benefit automatically.
Where Your TSA Precheck Number Should Appear When You Travel
Finding the KTN once is only part of the story. You also want quick ways to check that the number is connected to each new trip. Use this table to confirm that everything lines up before you reach the airport.
| Place To Check | Where The KTN Shows | What To Verify |
|---|---|---|
| Frequent Flyer Profile | Secure traveler or Known Traveler section | Full name and date of birth match your enrollment records |
| New Flight Booking | Passenger information step during checkout | KTN field is filled and not confused with the redress field |
| Existing Reservation | Passenger details page for that trip | The KTN appears before you check in for the flight |
| Mobile Boarding Pass | TSA PreCheck text or logo near your name | The indicator shows for each leg of your trip |
| Printed Boarding Pass | Lines such as TSA PRE or TSAPRECHK | The text prints clearly for every segment |
| Check-In Confirmation Screen | Passenger data summary before seat selection | The KTN field still holds your number after you check in |
Fixing Problems When TSA Precheck Is Missing
Sometimes your KTN is correct, yet the boarding pass still does not show TSA PreCheck. In that case, small data mismatches usually sit behind the problem. One wrong digit in your date of birth or one missing letter in a last name can stop the system from matching your profile.
Compare each part of your booking with your TSA PreCheck or Trusted Traveler record. Match full name, middle name, date of birth, and gender. If everything lines up and PreCheck still does not show, call the airline and ask an agent to reissue the boarding pass for that flight.
Simple Habits So You Never Lose Your Number Again
First, store the KTN in a secure digital note that you use for other travel data, such as passport numbers and airline loyalty numbers. Second, add it to the secure traveler sections of every airline profile you have, then check your next booking to see that TSA PreCheck appears by default.
Third, keep a simple physical backup. Write the KTN neatly on a small card tucked into your passport holder or wallet, away from view but easy to reach. If you started this search by asking how do you find your tsa precheck number? you now have clear paths to recover it and keep it safe, so the shorter security lane stays part of every trip.