Illinois is in the Central Time Zone in the United States of America (USA). US Central Standard Time (CST) is 6 hours behind Greenwich Mean Time (GMT-6).
Credit Card Account Number Verification - Card Type Identification. This page provides information about identifying a credit card type from a card number's numeric range and number of digits. First digit must be a 3 and second digit must be a 4 or 7. Valid length: 15 digits. First digit must be 3 and second digit must be 0, 6, or 8. Valid length: 14 digits. Valid length: 16 digits.
The issuer identification number also known as the bank identification number (BIN) is the first six digits of the credit card number. These identify the institution that issued the credit card to the card holder. Here's a list of known IIN prefixes. Afterwards comes the account number, digit 7 to last minus one.