Why databases disagree
One source may store a legal issuer name, another a consumer brand and another a programme manager. Country fields can refer to an allocation, an institution or a market programme. Product labels may be normalized differently.
The disagreement is not always an error. The first question is whether the sources resolve the same range and the same moment in time.
Freshness is visible through change
Portfolios are acquired, renamed, reissued and migrated. A trustworthy dataset records when it was refreshed and avoids timeless claims such as “always accurate.”
For recurring operations, log the data version used for a decision. That makes later investigation possible when a range changes.
Precision changes the answer
A six-digit record can describe a parent allocation containing many eight-digit sub-ranges. A more specific record may carry a different type, level or programme name without contradicting the parent.
Quality checks should compare like with like: same prefix length, same source date and the same field definition.
How to evaluate a lookup source
Look for declared granularity, refresh information, sensible handling of missing fields, secure input requirements and clear limitations. Be cautious when a service asks for a complete PAN or claims that a BIN alone can validate a card.
The strongest operational pattern is layered: use a BIN database for context, then use the acquirer, processor or payment network data appropriate to the decision.
How BINov separates current and historical data
BINov keeps the current lookup protected and provides its result as an image. The older open-format database remains available separately at old.binov.net for legacy compatibility and research.
Keeping those roles explicit prevents historical coverage from being mistaken for a promise about the current paid dataset.
Accuracy is not one percentage. It is the intersection of correct range, current snapshot, clear field meaning and honest uncertainty.
Primary sources
This guide is grounded in public material from ISO and payment-industry organizations.
Frequently asked questions
Which source should win when results differ?
Prefer the source with the appropriate range precision, a known refresh date and authority for your use case.
Can a BIN database guarantee transaction success?
No. Transaction outcomes depend on authorization and risk systems outside a reference database.