BIN 400661
BANCO DA UNIAO • GUINEA-BISSAU • VISA
About BIN 400661
BIN 400661 is a VISA debit card operating on the CLASSIC payment network, issued by BANCO DA UNIAO in GUINEA-BISSAU (GW). The default settlement currency for this card is Unknown. This is not a prepaid card — it is linked to a standard bank account or credit facility. Card numbers beginning with this BIN pass the Luhn algorithm validation, confirming they are structurally valid card numbers.
Frequently Asked Questions
What is BIN 400661?
A Bank Identification Number (BIN), also called an Issuer Identification Number (IIN), is the first 6–8 digits of a payment card. BIN 400661 identifies BANCO DA UNIAO as the issuing institution for cards carrying this prefix. These digits tell payment processors which bank issued the card before the full transaction is initiated.
Which bank issued BIN 400661?
BIN 400661 was issued by BANCO DA UNIAO, a financial institution operating in GUINEA-BISSAU.
In which country is BIN 400661 registered?
BIN 400661 is registered in GUINEA-BISSAU (country code: GW). The issuing bank, BANCO DA UNIAO, holds the licence to issue cards under this BIN range in GUINEA-BISSAU. Transactions on these cards typically involve GUINEA-BISSAU-based banking and settlement infrastructure.
Is BIN 400661 a credit, debit, or prepaid card?
BIN 400661 belongs to the debit card category. This is not a prepaid card, so it is linked to a standard bank account or approved credit facility.
What payment network does BIN 400661 use?
BIN 400661 operates on the VISA payment network using the CLASSIC card scheme. This means all transactions made with cards carrying this BIN are routed and processed through VISA's global payment infrastructure.
What currency is associated with BIN 400661?
The primary currency associated with BIN 400661 is Unknown. This is the currency in which domestic transactions are typically billed for cards under this BIN range when used in GUINEA-BISSAU. International transactions may involve currency conversion depending on the merchant's country.
Does BIN 400661 pass the Luhn check?
Yes — card numbers beginning with BIN 400661 pass the Luhn algorithm. The Luhn algorithm is a standard checksum formula used by payment systems to detect miskeyed or structurally invalid card numbers. A passing result confirms the number range is mathematically valid.
