If you can sacrifice a bit of the film, pull some out in a changing bag and develop it to get the edge numbers. You may need to re-trim the leader so it will load properly. This will at least tell you what it is and you may be able to look up the batch numbers and find out how old it is.
Barring that, if the film is Fujicolor and fairly recent it has red, green and blue in the edge markings which you can test develop to look for color shifts and fogging. I assume you mean color here as B&W you can obviously test develop to check for base fog but it is more complicated with color as you know.