U.S. Customs and Border Protection 싸이트에 가보시면 아래의 글이 있습니다.
How can I get a record of my travel in and out of the United States?
U.S. Customs and Border Protection (CBP) only has complete records of the entry and exit of persons arriving and departing by air or sea. If you are a legal permanent resident and crossed at a land border, it is unlikely that we would have a record of your travels. Also CBP’s records only go back to 1982, even for air travel.
