3 begins with the card BIN of American Express, which belongs to the international credit card.

Generally, those allocated to ICBC begin with 37.

There are mainly the following types:

Peony dual-currency credit card (American Express brand)

PetroChina dual-currency credit card (American Express brand)

Peony sports card (American Express brand)

Peony mobile payment card and so on.

American Express, abbreviated as AMEX, is one of the most recognizable credit cards in the world.

American Express, Visa and MasterCard are the most popular credit cards in the world.