BIN 531710 Mastercard B2B credit card · Optal Financial, Ltd. · 🇬🇧 United Kingdom

Prefix 531710 identifies Mastercard cards issued by Optal Financial, Ltd. (B2B credit card). Issuing country: 🇬🇧 United Kingdom.

✓ Runs locally💳 MastercardCredit🇬🇧 United Kingdom
What BIN 531710 identifies
Issuing bankOptal Financial, Ltd.
NetworkMastercard
Card typeCredit
Card levelB2B
Issuing country🇬🇧 United Kingdom
Prefix length6 digits

A prefix identifies the issuer and the network, nothing else: not the cardholder, not the balance, not whether the card is valid. A bank runs hundreds of them, and a prefix can be reassigned after a portfolio is closed. The details below are computed in your browser: the full number is never sent, and only its first three digits appear in the URL of the reference-data slice being downloaded.

Other prefixes from Optal Financial, Ltd.

223367223419223438223483434937435045435055439733439734439735439736455745

All prefixes from Optal Financial, Ltd. · All issuers in this country

Examples:
MASTERCARDBIN 531710🇬🇧 United Kingdom

🔒 Network and Luhn check computed locally; the issuer is read from a static file. Paypedia never receives or stores any card number.

Anatomy of a card number. MII, BIN, account number, and Luhn check digit.

The BIN (Bank Identification Number), officially called the IIN (Issuer Identification Number), is the first few digits of a card number. They identify the network and the issuer, which lets the merchant route the transaction and apply the right fees.

4MIIIssuer industry (4 = banking/finance)
53904Rest of the BINTogether: 6 to 8 digits that identify the issuer
123456789Account numberAssigned by the issuing bank
8Luhn check digitMod 10 check across the whole number
⚠️
BIN-8 migration: historically 6 digits long, BINs are moving to 8 digits at Visa and Mastercard to ease the shortage of ranges. A single 6-digit prefix can now cover several issuers, so enter 8 digits when you have them for a reliable match.

Look up a card from your assistant. The BIN database, plugged into your AI.

Paypedia’s MCP server exposes this database: network, issuer, country, debit or credit, and Luhn check, across 458,044 BINs and 5,805 IIN ranges, locally and with no API key.

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