When you were admitted to the US, your passport was ink-stamped by Customs and Border Protection (CBP) to show the visa class you were admitted in and the date your status expires.
This ink-stamp is called an I-94 admission stamp.
An I-94 record is a detailed record of your I-94 admission, which includes your I-94 number.
To obtain your I-94 record, please visit the US Customs and Border Protection website.
If you have trouble locating your I-94 record at this website, please contact CBP at 1-757-858-6103. When you call, please say “I am a foreign national and I cannot locate my I-94 record at your website.”