Your TSA PreCheck Number: What It Is, Where to Find It, and How to Use It ✈️
If you've applied for TSA PreCheck, you've taken a step toward faster airport security screening. But once you're approved, you'll need to know what your TSA PreCheck number is, where to locate it, and how to use it effectively. This guide walks you through the essentials.
What Is Your TSA PreCheck Number?
Your TSA PreCheck number (also called your Known Traveler Number or KTN) is a unique identifier issued by the Transportation Security Administration when your application is approved. It's a 10-digit code that connects your background check and eligibility status to your identity in the TSA system.
This number is what allows you to access expedited security screening lanes at participating U.S. airports. When you provide it during booking or check-in, it signals to TSA officers that you've already undergone vetting and are eligible for benefits like keeping shoes, belts, and light jackets on during screening, along with leaving laptops and liquids in your carry-on bag.
How to Find Your TSA PreCheck Number 🔍
Your TSA PreCheck number appears in several places, depending on when and how you applied:
Your approval notice email or letter
When your application is approved, TSA sends you a notification. This official document includes your complete KTN. Check your email (including spam folders) if you applied online, or look for a physical letter if you applied in person.
The TSA website
You can log into your account at the official TSA website using the same credentials you used to apply. Your number will be visible in your application status dashboard.
Your trusted traveler card (if you requested one)
Some travelers receive a physical RFID card. Your TSA PreCheck number is printed on the back of this card.
Your airline's website or app
After you've added your number to your frequent flyer profile or booking, it may be stored there for reference.
If you've misplaced your number and can't locate it through these channels, you can contact TSA directly through their official website or call their customer service line for assistance.
Where and When to Enter Your TSA PreCheck Number
Providing your number at the right time ensures you get the benefits you've paid for.
During flight booking
When you reserve a flight, there's typically a field labeled "Known Traveler Number" or "TSA PreCheck." Enter your full 10-digit number here. Airlines use this information to flag your reservation.
At airline check-in
If you didn't enter it during booking, provide it at the ticket counter or kiosk. Staff can add it to your reservation before you head to security.
Verbally at security
Tell the TSA officer at the checkpoint that you have TSA PreCheck. They can verify your eligibility in their system, even if your airline didn't flag your boarding pass.
On your boarding pass
Once entered correctly, your number (or a TSA PreCheck indicator) typically appears on your boarding pass. This is what officers use to route you to the expedited lane.
Important Details to Know
Your number doesn't change
Unlike passwords, your TSA PreCheck number remains the same for the duration of your membership (typically five years). You'll need a new number only when you renew your membership.
It's for U.S. travel only
TSA PreCheck expedited screening applies to domestic U.S. flights and some international flights departing the United States. International travel benefits vary by country and agreement.
Different from Global Entry or NEXUS
If you also hold Global Entry, SENTRI, or NEXUS, you have separate known traveler numbers for each program. Each has its own uses and benefits. Don't mix them up.
Verify accuracy with your airline
If your boarding pass doesn't show the TSA PreCheck indicator after you've provided your number, flag it with an agent. Errors in entry or transmission can prevent you from using expedited screening.
What You'll Need to Remember
Keep your TSA PreCheck number handy—store it in your phone, wallet, or a trusted digital password manager. You'll enter it repeatedly for flights, so having it readily available saves time during the booking process.
If you can't remember it, don't worry: you can always retrieve it from your TSA account, your approval documents, or by calling customer service. There's no penalty for looking it up; just allow a few extra minutes before your flight to sort it out if you're at the airport.
