BIN / IIN Code 603544 is an Issuer identification number for CITIBANK USA, N.A. from Issuing network MAESTRO. The code is used in United States and can be found on a credit card. The type of 603544 is debit, and the card level is STANDARD.
When you apply a credit card, You will find a digit string on the card. The number is the credit card number, it consists of two parts. The leading 6 digits is the BIN number (Bank Identification Number), also known as the IIN (issuer identification number), the last digit is the Luhn check digit and the remaining card number is your personal account number. Visa and Mastercard are the two most prominent payment processors for credit cards.
The types of credit card includes Business credit cards, Secured credit cards, Prepaid cards and Digital cards. All credit card numbers must pass the Luhn algorithm test. The Luhn formula or Luhn algorithm, also known as the "mod 10" or "modulus 10" algorithm is a simple checksum formula, named after its creator, IBM scientist Hans Peter Luhn, used to validate a variety of identification numbers. It is used in credit card numbers, IMEI numbers and many ID numbers like Israel ID Numbers, Greek Social Security Numbers (ΑΜΚΑ), Canadian Social Insurance Numbers and National Provider Identifier numbers in the United States even survey codes appearing on Taco Bell, McDonald's and Tractor Supply Co. receipts.