A Bank Identification Number is the first six digits of a credit card, debit card, charge card, etc. These digits identify which network the card belongs to as well as which bank issued it.

Known bank identification numbers

• 3717 - American Express Charge Card
• 3725 - American Express Credit Card
• 3794 - American Express Corporate Charge Card
• 4117 - Bank of America (formerly Fleet) Visa Debit Card
• 4264 - MBNA Visa
• 4305 - Bank of America (formerly Fleet) Visa Credit Card
• 4254 - Washington Mutual (formerly Fleet) Visa Debit Card
• 449352 - Nationwide Building Society VISA
• 4495 - Citizen's Bank VISA
• 4500 - CIBC VISA
• 450060 - CIBC Aerogold (VISA credit card)
• 4502 - CIBC VISA
• 4503 - CIBC VISA
• 4505 - CIBC VISA
• 454313 - Nationwide Building Society Visa Debit Card
• 462785 - Egg plc VISA
• 482870 - Wachovia Bank Visa debit card
• 492940 - Barclaycard VISA credit card
• 529930 - Marks & Spencer Money MasterCard credit card
• 532902 - Wachovia Bank MasterCard credit card
• 544156 - AIB MasterCard credit card
• 5424 - CITI Bank Master Card
• 543482 - Royal Bank of Scotland MasterCard credit card
• 6011 - Discover Bank Discover Card credit card
• 6035 - CITI Bank (Home Depot) Card
• 675967 - NatWest debit card