BIN IIN Issuer Network Lookup
Longest-prefix6/8-digit IIN resolution through caller independently verified issuer/network registry, no external bank lookup, PAN validation or current assignment guarantee. Caller independently verifies edition, jurisdiction, applicability and one currency; screening does not establish legal compliance, coverage or bank approval.
Description
Issuer identification uses supplied prefixes and an independently verified registry.
Issuer identification uses supplied prefixes and an independently verified registry.1
Longest-prefix matching is narrower than validating a full card or determining live issuer routing. Use BIN IIN Issuer Network Lookup to evaluate the supplied inputs under the model explained below.
When to use BIN IIN Issuer Network Lookup
Use BIN IIN Issuer Network Lookup to evaluate the supplied inputs under the model explained below. Establish the currency and minor-unit convention, measurement period and applicable transaction or institution context.
How to use BIN IIN Issuer Network Lookup and understand its results
- Establish the currency and minor-unit convention, measurement period and applicable transaction or institution context.
- Enter Caller iin prefixes, Caller issuer labels, Caller network labels, Query iin digits using the field table and validation rules below, then run the tool.
- Read Longest matching caller iin prefix, Caller issuer label, Caller network label; interpret the units, signs, ordering and unknown-value placeholders described below.
- Correct reported input errors and rerun. Apply successful results according to their specific meanings and check the assumptions before using them in a decision.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| callerIinPrefixes | Caller iin prefixes | array of string | Required; constraints below |
| callerIssuerLabels | Caller issuer labels | array of string | Required; constraints below |
| callerNetworkLabels | Caller network labels | array of string | Required; constraints below |
| queryIinDigits | Query iin digits | string | Required; constraints below |
Supply unique exact six- or eight-digit prefixes with aligned nonblank issuer and network labels, each at most 128 UTF-16 code units, and a query of 6–8 digits. Select prefixes with which the query begins, then choose the longest match. No match is an input error; a seven-digit query can match a six-digit prefix. Return matched prefix and supplied labels unchanged. No live BIN registry, full PAN, checksum or card validation is involved.
matchedPrefix=longest callerPrefix for which query.startsWith(prefix) Use the field order, units and branch conditions described above.
| Output field | Meaning | Value type |
|---|---|---|
| longestMatchingCallerIinPrefix | Longest matching caller iin prefix | string |
| callerIssuerLabel | Caller issuer label | string |
| callerNetworkLabel | Caller network label | string |
{
"input": {
"callerIinPrefixes": [
"123456",
"12345678"
],
"callerIssuerLabels": [
"issuer-a",
"issuer-b"
],
"callerNetworkLabels": [
"network-a",
"network-b"
],
"queryIinDigits": "12345678"
},
"output": {
"longestMatchingCallerIinPrefix": "12345678",
"callerIssuerLabel": "issuer-b",
"callerNetworkLabel": "network-b"
}
}Limitations and assumptions
Longest-prefix matching is narrower than validating a full card or determining live issuer routing. Apply the exact scope and assumptions explained above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse arrays fail validation. Domain-specific bounds, alignments and supported tokens are explained above; extremely large inputs or outputs can also be rejected. Input errors differ from successful false results, empty match lists and unknown-evidence placeholders.
Alternative or Complementary methods
Use IBAN Country Length Format Lookup for a related task: An IBAN format combines a country code, check digits and a country-specific account pattern.
Use Card Expiry CVV Length Checker for a related task: A card's expiration month convention is distinct from its CVV format policy.
References
-
BIN IIN Issuer Network Lookup — tool.io
Similar or alternative tools
- IBAN Country Length Format Lookup
An IBAN format combines a country code, check digits and a country-specific account pattern.
- Card Expiry CVV Length Checker
A card's expiration month convention is distinct from its CVV format policy.