Bank Identification Number (BIN)

By September 17, 2018Industry Terms

A bank identification number (BIN) is used to uniquely identify each bank or financial institution within the card networks. BINs are used to identify both issuers and acquirers.

Since cards can be issued by entities other than a bank–American Express, for example–Issuer Identification Number (IIN) is often a more accurate term.

How Are BINs Used?

Merchants most commonly use BINs to identify the bank that issued a given card. They use this information to submit authorization requests and ensure payment settlements are routed to the correct institution. Merchants might also analyze chargeback data by BIN to determine which institutions process the most chargebacks.

Major Industry Identifier (MII)

The first six digits of a cardholder’s account number reveal the issuer’s BIN. The first digit in the six-digit BIN is called the Major Industry Identifier (MII) and describes the issuer’s industry. The MII also helps identify the card association the issuer is a member of.

Major Industry Identifiers (MII)

0

Issuer’s Industry:
ISO/TC 68 and other industry assignments

1

Issuer’s Industry:
Airlines
Card Network:
UATP

2

Issuer’s Industry:
Airlines, Financial, Other future industry assignments
Card Network:
MIR, Mastercard

3

Issuer’s Industry:
Travel and Entertainment
Card Network:
American Express, Diners Club Carte Blanche, Diners Club International, JCB

4

Issuer’s Industry:
Banking, Financial
Card Network
Visa

5

Issuer’s Industry:
Banking, Financial
Card Network:
Mastercard, Diners Club US & Canada, Maestro, Dankort

6

Issuer’s Industry:
Merchandising, Banking, Financial
Card Network:
Discover, China UnionPay, InterPayment, InstaPayment

7

Issuer’s Industry:
Petroleum,
Other future industry assignments
Card Network:
None

8

Issuer’s Industry:
Healthcare, Telecommunications, Other future industry assignments

Card Network:
None

9

Issuer’s Industry:
Reserved for assignment by national standards organizations
Card Network:
None

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