The 2022 US visa credit card number visa international credit card number starts with 4. The card number of an international standard credit card is generally 16 digits, and the first 6 digits are assigned by the international card organization; among them, the 16-digit credit card starting with "4" is a VISA card, and the 16-digit credit card starting with "5" is a MasterCard card. Credit cards with 15 digits starting with "34" or "37" are American Express cards, credit cards with 14 digits starting with "30", 36", "38" or "39" are Diners Club cards, and about 16 digits starting with "35" The credit card starting with "62" is UnionPay card. MasterCard is a bank card jointly issued by MasterCard International and banks around the world.