CreditCardValidator
Mastercard Credit Cards — Postoffice - IIN 542598
Credit card numbers that start with the Issuer Identification Number (IIN) 542598 are Mastercard credit cards issued by Postoffice in United Kingdom. Note that this is the only IIN range issued by Postoffice, so all cards issued by this provider will be of the format 5425 98XX XXXX XXXX. For more information, call Postoffice at (845) 607-6500.
| Card Scheme | Mastercard |
|---|---|
| Bank Name | Postoffice |
| Card Type | CREDIT |
| IIN | 542598 |
| Card Number | 5425 98XX XXXX XXXX |
| Bank Phone | (845) 607-6500 |
| Bank Country |
United Kingdom
|
Anatomy of a Postoffice Mastercard Credit Card Number
While credit card number may seem like a random string of digits, they actually contain a large amount of valuable data about the card that can be used for validation and verification purposes.
Digit 1 — The MIIThe first digit of the card is known as the MII digit, and indicates the credit card's scheme. In this case, the MII of 5 indicates that this is a Mastercard card.
Digits 1-6 — The IIN / BINThe first six digits of the card number, inclusive of the MII, are called the IIN (Issuer Identification Number) or BIN (Bank Identification Number). This sequence uniquely identifies the bank that issued the card. In this case, the IIN of 542598 indicates that this card was issued by Postoffice in United Kingdom.
Digits 7-15 — The Account NumberDigits 7-15 of the credit card number contain the Primary Account Number, or PAN, issued by the bank to uniquely identify the account holder. These 8 digits are the most important part of the credit card number.
Digit 16 — The Check DigitThe last digit of the card number (the 16th digit in most cases) is the check digit, which is calculated by applying a mathematical formula called the Luhn algorithm to the preceding portions of the account number. While not actually part of the account number itself, the check digit is essential to allow easy validation of card numbers and detection of typos, missed digits, etc.