BIN routing
Issuer identifiers shape how card authorisations reach suitable acquiring destinations across card networks and products. BIN routing evaluates the PAN prefix, then applies issuer, domestic, cross-border, debit and credit rules through Cardflo’s integrated BIN tables.
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BIN routing directs card transactions to specific acquirers leveraging information encoded in the Bank Identification Number. This technique allows granular control over payment flows, optimising for factors such as scheme rules, processing costs, or regional preferences. BIN routing configurations are dynamic, requiring constant updates for efficacy.
Cardflo provides the mechanisms for merchants to define how incoming transactions are routed based on their BIN. Merchants specify rules linking BIN attributes to preferred acquirer connections, ensuring each payment attempt is directed according to pre-established criteria. This architectural layer provides technical oversight of transaction disposition.
BIN routing analyses card data to direct transactions to the acquirer with the highest probability of approval for that specific card type. This targeted approach significantly reduces decline rates and improves overall transaction success.
BIN routing overview
BIN routing is a technical process differentiating payment transactions by their initial digits to determine the most appropriate processing pathway. Each unique BIN, or extended BIN, carries specific data about the issuing institution, card scheme, and geographic origin.
Cardflo's infrastructure processes these identifiers to apply predefined routing logic, steering transactions to designated acquirer endpoints.
Effective BIN routing relies upon accurate and current BIN information. Maintaining up-to-date BIN tables is critical to prevent misrouting and ensure compliance with scheme mandates, especially following the migration to 8-digit BINs.
Cardflo integrates data maintenance protocols to continuously refresh BIN data, presenting a current dataset for routing decisions. This system underpins the operational integrity of payment processing.
Merchants configure BIN routing rules within the Cardflo portal, mapping specific BIN ranges or attributes to nominated acquirer connections. This setup allows for precise control over transaction flow, directing payments to acquirers best suited to handle particular transaction types based on cost structures, regional coverage, or technical compatibility.
The system executes these rules before passing the transaction to the preferred acquirer.
How BIN routing works
BIN data ingestion
Cardflo continuously ingests and updates BIN range data from official scheme sources, incorporating changes such as the 8-digit BIN migration details. This establishes a canonical, current database of card issuer information, including card type, country of issuance, and whether it's a consumer or commercial card. This foundational data underpins all subsequent routing decisions.
Rule definition
Merchants define routing rules within the Cardflo control panel, specifying conditions based on BIN attributes. Rules might stipulate that all transactions from a particular country's BINs are sent to a regional acquirer, or that corporate cards are routed to a specific processor. Rulesets are prioritised, allowing for granular control and exception handling.
Transaction evaluation
Upon receiving an authorisation request, Cardflo extracts the card's BIN and queries its internal, up-to-date BIN table. The system evaluates the transaction against the merchant's predefined BIN routing rules. This evaluation determines the most suitable acquirer connection based on the card's issuer, type, country, and other associated attributes in the BIN data.
Acquirer assignment
After identifying the optimal acquirer via the BIN routing logic, the transaction is prepared and forwarded to the designated connection. This happens before any smart routing decisioning (which considers other factors like previous success rates), ensuring the BIN-determined preference is respected as the primary routing directive. The outcome of the acquirer assignment is logged for audit.
Why BIN routing matters
Optimise for processing costs
Different acquirers offer varied pricing models for specific card types, regions, or schemes. By directing transactions from particular BINs (e.g., domestic debit cards in a specific country, or premium credit cards) to an acquirer with a favourable cost structure for that segment, merchants can directly influence their processing expenditure. This mechanism translates raw BIN data into a financial advantage. The precise matching of BIN to acquirer minimises unnecessary fees applied to certain transaction profiles.
Meet scheme and legal requirements
Certain card schemes or national regulations mandate that transactions originating from specific countries or using particular card products must be processed by an acquirer domiciled in that region or certified for that card type. BIN routing provides the technical means to comply with these restrictions, automatically directing transactions to the appropriate acquirer based on the card's issuing location or type. This ensures legal adherence and avoids potential fines or processing blocks.
BIN routing use cases
Prepaid product routing
Digital service merchants distinguish reloadable prepaid, gift and general-purpose prepaid cards from consumer debit because issuer controls and authorisation behaviour differ by product. Cardflo integrates maintained BIN tables into routing rules, directing each prepaid segment towards acquirer partners whose acceptance configuration supports the identified funding instrument.
Fleet card data routing
Fleet management operators separate commercial fleet and purchasing cards from consumer credit because corporate issuers may expect vehicle, fuel or level three transaction data. Cardflo uses BIN product classifications to route eligible payments to acquirer partners configured to transmit the required enhanced data fields through the relevant card network.
Co-badged scheme selection
European retailers accepting co-badged cards must select between a domestic debit scheme and Visa or Mastercard rails while respecting cardholder choice and applicable scheme rules. Cardflo applies network preference logic from BIN attributes, sending the authorisation through an acquirer partner that supports the selected scheme and corresponding domestic acceptance path.
Issuer relationship routing
Gaming operators processing card deposits can encounter materially different authorisation responses across issuing banks, even within the same network and card type. Cardflo maps issuer BIN ranges to approved routing rules, directing transactions towards acquirer partners with appropriate issuer connectivity and still keeping SCA, 3DS2 and operator risk controls.
BIN routing by the numbers
This represents the typical industry range for savings on interchange and cross-border fees when transitioning from a single-acquirer setup to a multi-acquirer BIN-optimised strategy.
Typical improvement observed by merchants when routing international transactions to local acquirers, thereby reducing issuer-side risk declines for cross-border traffic.
The standard duration added to the payment flow by a BIN lookup and routing decision, ensuring that intelligent steering does not negatively impact the checkout experience.
Methodology: these figures are illustrative ranges drawn from published industry data and observed merchant cohorts, not guarantees. Actual results depend on your risk profile, card mix, geography and acquiring setup, and are confirmed only in your own pricing and approval terms.
Related terms
Talk to our team about a live rollout across our acquirer partners' rails.
What you get with BIN routing
- Identify card issuer, country of origin, and card product based on the Bank Identification Number (BIN).
- Distinguish between debit and credit cards, and commercial versus consumer card products.
- Define custom routing rules for transactions originating from specific BIN ranges or attributes.
- Maintain an up-to-date BIN table, automatically updated to reflect scheme changes including 8-digit BINs.
- Map BIN attributes, such as card type or issuing country, to preferred acquirer connections.
- Execute BIN-based routing logic prior to transaction submission to an acquirer.
- Configure exceptions for BIN ranges where specific routing overrides general rules.
- Access detailed BIN data to inform and refine routing strategies for different card types.
- Implement distinct processing paths for corporate cards versus individual consumer cards.
- Leverage BIN data to comply with regional processing mandates or local acquiring requirements.
A short scoping call, then a written plan for your MIDs.
Questions about BIN routing
How does BIN routing differ from standard dynamic routing?
Standard dynamic routing often relies on broad parameters such as transaction value, time of day, or merchant category code. BIN routing is more granular, focusing on the specific attributes of the card itself, such as the issuer's location and the card's technical capability.
While dynamic routing might split traffic for load balancing, BIN routing specifically aims to match the unique identity of the payment instrument with the acquirer most likely to offer the lowest cost and highest authorisation probability.
Will BIN routing assist with SCA and PSD2 compliance?
Yes, BIN routing allows merchants to identify cards issued within the European Economic Area (EEA) versus those issued in non-regulated regions. This enables the merchant to apply Strong Customer Authentication (SCA) triggers only where legally required by PSD2.
Proper BIN identification prevents the unnecessary friction of 3DS on transactions where the issuer is outside the scope of European regulation, thereby protecting the conversion rate for international shoppers.
How are card network preferences applied within BIN routing rules?
BIN routing can apply network-specific conditions after the card prefix has been matched against an integrated BIN table. Merchants can define eligible paths for Visa or Mastercard transactions and combine those conditions with issuer, domestic or cross-border status, and debit or credit classification.
Cardflo then sends the transaction through the configured acquirer partner path, subject to the merchant’s approved MIDs and each partner’s acceptance requirements.
Is an eight-digit BIN required, or will six digits suffice?
The industry is currently transitioning from six-digit to eight-digit BINs due to the depletion of available number ranges. While six digits can still identify the major scheme and brand, eight-digit BINs provide the necessary granularity to identify specific sub-brands and issuing banks accurately.
Modern routing engines should support both to ensure that regional steering remains precise and that no transactions are misidentified during the industry-wide migration.
Does BIN routing affect the merchant's PCI DSS scope?
If the BIN routing logic is handled by a PCI-compliant gateway or orchestration provider, the merchant's scope remains unchanged.
However, if the merchant targets the BIN data themselves on their own servers, they must ensure their environment is certified to handle the first six to eight digits of the PAN.
Most modern implementations use a vault or tokenisation system to perform BIN lookups without exposing the merchant to raw card data.
How can BIN routing lower the rate of failed recurring payments?
Subscription failures often occur when an issuer blocks a cross-border recurring charge. By using BIN routing to ensure that the Merchant Initiated Transaction (MIT) is processed through an acquirer in the same region as the issuer, the transaction appears less risky.
This increases the likelihood that the issuer's automated systems will approve the transaction without requiring manual intervention or step-up authentication from the cardholder.
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