回复：File number (A Number) 是指Alien number 吗？几年前的OPT EAD 上的A#是一样的吗

A Number is Alien number. The A number you received from your OPT EAD is not your official A number.

If you I-140 is recently approved, please check your I-140 approval notice. You will find an A # from there. If not, just fill out "none" in your I-485 or other application forms. It really doesn't matter. If the USCIS finds that you actually have an A# in the system, they will issue the same A# for your I-485 receipt.