 US citizens who are SENTRI members may use TSA PreCheck on all participating airlines by entering their Customs and Border Protection ID number or PASS ID/KTN (Known Traveler Number) from their SENTRI card into their flight reservation information or into their frequent flyer account.The same privileges extend to NEXUS and Global Entry members.Enrollment centers are located in Douglas, Nogales, and San Luis, Arizona; Calexico, Otay Mesa, and San Ysidro, California; and Brownsville, El Paso, Hidalgo, and Laredo, Texas.