OT I know but just been doing some online research while trying to sort some stuff out for my US visa application. The US government have a handy website one can use to look up previous details of travel to the US. The history goes back up to five years and you can enter details from your current or expired passport as long as it's within the five year history.

Quite cool if you just want to check out previous travel. Also useful for filling in one of the questions on the US visa applcation form.

https://i94.cbp.dhs.gov/I94/request.html