It looks like your message was cut off, but you might be looking for information regarding Form I-94 (Arrival/Departure Record) issued by U.S. Customs and Border Protection (CBP).
Form I-94 is a critical document that serves as official proof of legal entry and dictates how long an international visitor can lawfully remain in the United States. Core Details of Form I-94
Purpose: It records your legal admission status, visa classification (such as F-1, J-1, H-1B, or B-2), and your mandatory departure date.
Duration of Status (D/S): For students and exchange scholars, the “Admit Until Date” typically shows “D/S”, meaning you can legally stay as long as you maintain your school or program requirements.
Accessing the Form: CBP processes arrivals electronically. You can retrieve, review, and print your records directly on the Official CBP I-94 Website by entering your passport details.
Alphanumeric Format: Modern I-94 identifiers consist of 11 characters structured as nine digits, followed by a letter in the 10th position, and a single digit at the end.