A credit card number starting with 5528 identifies it as a Mastercard, specifically a Diners Club Mastercard, as Mastercard numbers begin with 5, and Diners Club uses the 55 prefix within the Mastercard network, though the specific issuer (bank) determines if it's a debit or credit card. While the '5' signifies Mastercard, the '55' points towards Diners Club International, handled by Mastercard.
Diners Club transactions can interface from the GDSs with CA as the credit card company code (because Diners Club is handled by MasterCard and Diners Club numbers start with 5528).
The first digit of a Visa card is always 4, identifying it as part of the Visa network, while the subsequent digits (part of the first 6-8, the Issuer Identification Number (IIN) or Bank Identification Number (BIN)) specify the issuing bank, like 4147 or 403766, helping to determine the financial institution.
The first six to eight digits are referred to as the bank identification number (BIN) or issuer identification number (IIN). These numbers identify the card issuer. The remaining digits identify the individual account of the cardholder.
A card that starts with 5524 is a Mastercard, but it can be a credit card issued by the Commonwealth Bank of Australia or a debit card issued by Morgan Stanley. Privacy Cards allow you to set spending limits and pause or close your card at anytime, helping you take back control of your online payments.
All American Express numbers start with 34 or 37; most MasterCard numbers start with 51, 52, 53, 54, or 55 (they also have some other potential starting numbers which we won't concern ourselves with for this problem); and all Visa numbers start with 4.
Issuer Identification Numbers: The First 6 Digits
A card's Issuer Identification Number (IIN), or Bank Identification Number (BIN), indicates which credit card company it originates from and clarifies which card network it belongs to.
1. Credit card number. This is the long number on the front of your card. It's usually 16-19 digits long and is unique to you.
The SWIFT/BIC code for Capital One is NFBKUS33XXX.
To tell if your card is Visa or Mastercard, look for their logos on the card; Visa has blue, white, and gold colors with a "V" symbol, while Mastercard features overlapping red and yellow circles; alternatively, Visa numbers start with '4', while Mastercard numbers start with '2' or '5'.
The 2/3/4 rule is a guideline, primarily used by Bank of America, that limits how many new credit cards you can get: no more than 2 in 30 days, 3 in 12 months, and 4 in 24 months, helping to prevent over-application and manage hard inquiries on your credit report. While not universal, it's a useful benchmark for responsible card application, though other banks have different rules (like Chase's 5/24 rule).
The first digit of a Visa card is always 4, identifying it as part of the Visa network, while the subsequent digits (part of the first 6-8, the Issuer Identification Number (IIN) or Bank Identification Number (BIN)) specify the issuing bank, like 4147 or 403766, helping to determine the financial institution.
The majority of credit card issuers (Visa and Mastercard) have 16 digits displayed across their cards. American Express has 15. The first six digits of the number indicate the Issuer Identification number or IIN. The first digit is the Major Industry Identifier or MII.
Depending on your card, the BIN may be the first six or eight digits. In this example, 400344 is the six-digit BIN. The first digit is the MII, indicating the industry of the card issuer. In this case, 4 appearing as the first digit means the card issuer is in the banking and financial industry.
How do you detect Credit card type based on number?
Your account number is located at the top of your online or paper statement.
Citi cards start with 5 or 4 in most cases, depending on whether the Citi card is on the Visa or Mastercard network. Store cards issued by Citibank will begin with a different number, since they are not associated with any major payment network.
The first 6 digits of a credit card number are known as the Issuer Identification Number (IIN), or sometimes the Bank Identification Number (BIN). This segment identifies the institution that issued the card and ties it to a specific card network (such as Visa, Mastercard, American Express, etc.).
Best Credit Cards with a $5,000 Credit Limit
Response Code: 54 - Expired Card. The customer's card is expired. Contact your customer and confirm that the correct dates were entered and that there were no mistakes (e.g. 05/11 rather than 05/12).
All the card numbers start 5424 (Citibank MasterCard) and there are actually only a small number of different card numbers.