whitespace and dashes are removed. To recognize just Visa, MasterCard and
Amex, you only need the first two digits; to recognize almost all cards
except some Switch cards, you need the first four digits, and to recognize
whitespace and dashes are removed. To recognize just Visa, MasterCard and
Amex, you only need the first two digits; to recognize almost all cards
except some Switch cards, you need the first four digits, and to recognize