Question: what is a known traveler number?
Answer: This nine-digit number usually begins with 15, 98 or 99 serves as your known traveler number, and can be found on the back of your NEXUS, SENTRI, or Global Entry card or by logging on to the Trusted Traveler Program website. ... Global Entry, NEXUS, and SENTRI are programs of U.S. Customs and Border Protection.