How can I find my Known Traveller Number (KTN)?

To find your Known Traveller Number (KTN), you can log into your Trusted Traveler Program account on the official website of the program you are enrolled in, such as TSA PreCheck or Global Entry. Your KTN will be displayed in your account profile once you log in. You can also find your KTN on the back of your Trusted Traveler Program card, if you have one.