\u00a0credit card<\/a>\u00a0network the card belongs to. The best-known credit card networks are Visa, Mastercard, and American Express. Although they’re the biggest card networks, they’re not the only ones! Besides the big three, there’s also Discover, Diner’s Club, Carte Blanche, JCB, and a few smaller ones.<\/p>\nThe first digit of a credit card serves as a Major Industry Identifier (MII) and tells us what credit card network the card belongs to. For a 3798 card, the first number is a “3”. It turns out that credit cards that start with a 3 are always an American Express, Diner’s Club, Carte Blanche, or a JCB credit card.<\/p>\n
This means our card can’t be a Visa, Mastercard, or Discover credit card. Although we haven’t narrowed it down to one card network, we know that a “3798” credit card must be an American Express, Diner’s Club, Carte Blanche, or a JCB card.<\/p>\n
How about other credit card prefixes? A card that begins with a 4 is always a Visa card. If the first digit is a 2 or a 5 would be a Mastercard credit card, and a 6 would be a Discover card. It used to be that Mastercard only used a 5, but they also started using a “2” a few years back.<\/p>\n