BIN 644903 — Lookup & Card Details

Check bank, country, card type, and issuer information for BIN 644903.

What is BIN 644903?

BIN 644903 is on the Discover network.

A Bank Identification Number (BIN, or Issuer Identification Number / IIN) is the first 6 to 8 digits of any payment card. It tells the payment network which institution issued the card, what kind of card it is, and where it was issued. The card runs on the Discover network.

Discover is a U.S.-based network whose BINs include 6011, 65 and the 644–649 ranges, with international acceptance via partner networks.

In practice this prefix is what a checkout sees first — risk engines score it, gateways route on it, and merchants use it to decide whether to accept the card class at all. BIN 644903 is institutional data under the ISO/IEC 7812 standard — looking it up reveals the issuing program, nothing about any cardholder.

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BIN 644903, digit by digit

Each position in a BIN carries defined meaning under ISO/IEC 7812. Here is how the 6 digits of 644903 break down.

6Major Industry Identifier — Merchandising & banking (Discover, UnionPay, Maestro)

4Issuer range digit 2 of the 6-digit prefix

4Issuer range digit 3 of the 6-digit prefix

9Issuer range digit 4 of the 6-digit prefix

0Issuer range digit 5 of the 6-digit prefix

3Issuer range digit 6 of the 6-digit prefix

BIN 644903 — frequently asked questions

Which bank issued BIN 644903?

The live registry lookup doesn't currently return a bank name for BIN 644903. The prefix resolves to the Discover network, and issuer details may appear as registries update — newly issued and virtual ranges often lag.

What card network does BIN 644903 run on?

BIN 644903 runs on the Discover network. Discover is a U.S.-based network whose BINs include 6011, 65 and the 644–649 ranges, with international acceptance via partner networks.

Is it legal to look up BIN 644903?

Yes. BIN 644903 is public infrastructure data under the ISO/IEC 7812 standard — it identifies the issuing program, not any cardholder. No personal or account data is involved in a BIN lookup.

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Related BIN ranges

Browse neighboring BINs — useful when pinpointing a card range.

Lower BINs

644893 644894 644895 644896

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