A known traveler number (KTN) lookup is a service that allows travelers to obtain their KTN and verify it is active. A KTN is a unique identifier assigned to low-risk travelers who have been pre-approved by the Transportation Security Administration (TSA).
KTN lookups are important for travelers who want to participate in the TSA PreCheck program. PreCheck allows travelers to bypass long security lines and receive expedited screening at airports. To obtain a KTN, travelers must complete an application and undergo a background check.
