Enter the first 6–8 digits of any payment card to check its Issuer Identification Number (IIN). Get the card issuer, network, country, and type — instantly, free, and without any signup.
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Understanding Issuer Identification Numbers and how they differ from BINs.
The Issuer Identification Number (IIN) is the standardised term defined by ISO 7812 for the first 6–8 digits of any payment card. It uniquely identifies the card-issuing institution — whether a bank, fintech, or other financial entity.
IIN and BIN refer to the exact same digits. BIN (Bank Identification Number) was the original industry term. ISO renamed it IIN because modern card issuers include non-bank institutions such as digital wallets, fintechs, and government programs.
An IIN encodes the card network (Visa, Mastercard, etc.), the issuing institution, the country of issue, the card type (credit, debit, prepaid), and optional tier (classic, gold, platinum). No personal cardholder data is included.
Historically, IINs were 6 digits. In 2022, ISO 7812 expanded support to 8-digit IINs to accommodate the growing number of card issuers globally. This checker supports 6, 7, and 8-digit inputs.
IIN vs BIN — Quick Comparison
| Property | IIN | BIN |
|---|---|---|
| Full Name | Issuer Identification Number | Bank Identification Number |
| Standard | ISO 7812 (current) | Legacy / informal |
| Who issues it | Any card-issuing institution | Originally banks only |
| Digit length | 6–8 digits | 6–8 digits |
| Same digits? | Yes — identical to BIN | Yes — identical to IIN |
| Used by | ISO, regulators, modern APIs | Developers, everyday usage |
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Common questions about IIN numbers and how to check them.
The IIN (Issuer Identification Number) is the first 6–8 digits on your debit card. It identifies the bank or institution that issued the card, the card network (e.g. Visa), and the country of issue. It contains no personal account data.
Yes. IIN and BIN refer to the exact same digits. IIN is the current ISO 7812 standard term. BIN is the older, widely used informal term. Functionally they are identical — both describe the first 6–8 digits of a payment card.
The IIN is simply the first 6, 7, or 8 digits of the card number printed on the front or embossed on any credit or debit card. Enter those digits into the IIN checker above to look up the issuer details.
This IIN checker supports all major card networks including Visa (starts with 4), Mastercard (51–55, 2221–2720), American Express (34, 37), Discover (6011, 622126–622925, 644–649, 65), UnionPay (62), JCB (3528–3589), and more.
Completely safe. The IIN (first 6–8 digits) contains zero personal information — no name, account number, CVV, or expiry. No full card number is ever needed or submitted.
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