First of all a card contain 16 digit and not 12, 4*** **** **** ****,so you are missing 4 digits,then you have the expiry,4*** **** **** ****=1403,then you have the type,4*** **** **** ****=1403101 or 201,find the rest,cause I never heard of a track 2 generator.
4*** **** **** ****=1403101...