航空器註冊編號 website

www.planespotters.net
你入左去之後搵Data Center>Airline Fleets>Airline Index/Airline Country
有晒所有航空公司既飛機列表.舊既都有但係好舊既就好似無乜(eg.無CX既L-1011)

Any website that when I type in the flight no. then i can see the aifcraft registration?
******No. because the use of aircraft is up to the airline and is subject to last minute change~