What is an ESTA Application Number?

An ESTA application number is generated once an application is submitted to Customs and Border Protection (CBP). The application number is a unique identifier used by CBP to identify traveler profiles. The ESTA application number is an alphanumeric string of 16 characters, almost always starting with the letter ‘R’ or ‘X’…

For more information on ESTA Application Numbers, visit https://www.official-esta.com/esta-resources/what-is-an-esta-application-number/