BIN 666039
www.citibank.com.hk
6660 3909 9916 5650
BIN 666039 is the Issuer Identification Number (IIN) at the start of a card number. It is issued on the Maestro network as a debit card at the ATM Card level. The issuing bank is Citibank (hong Kong), Ltd., based in Hong Kong. A BIN identifies the bank and card range only — it never reveals an account number, balance or cardholder.
Card number format for this BIN
Every card number that starts with 666039 follows these Maestro rules. Its last digit is a Luhn check digit calculated from the digits before it, which is why a mistyped number is usually rejected before a payment is even sent.
🇭🇰 Our dataset lists 1,721 BIN ranges issued in Hong Kong. See the Hong Kong BIN list with its banks, card schemes and card types.
Other BINs from Citibank (hong Kong), Ltd.
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Open BIN Lookup →Frequently asked questions
What bank issued BIN 666039?
BIN 666039 belongs to Citibank (hong Kong), Ltd. in Hong Kong. A BIN identifies the issuing bank and card range — never an individual account or cardholder.
Is BIN 666039 a credit or debit card?
It is a debit card on the Maestro network.
Can I get full card numbers from a BIN?
No. A BIN is only the first 6–8 digits and public routing information. It reveals the scheme, type, bank and country, but never a full card number, balance or cardholder. The sample on this page is randomly generated and holds no funds.