What is a Known Traveler Number (KTN)? | Transportation …
https://www.tsa.gov/travel/frequently-asked-questions/what-known-traveler-number-ktn
For members approved for Global Entry, NEXUS, or SENTRI, the KTN is the CBP PASS ID number. This nine-digit number usually begins with 10, 13, 14, 15, 16, 50, 70, 80, 95, 98, or 99 and can be found on the back of your NEXUS, SENTRI, or Global Entry card in the upper-left corner or by logging on to the Trusted Traveler Programs website.
DA: 18 PA: 41 MOZ Rank: 93