Visa BIN list Visa Credit Cards — Banco Nacional Ultramarino Sa - IIN 451187

Credit card numbers that start with the Issuer Identification Number (IIN) 451187 are Visa credit cards issued by Banco Nacional Ultramarino Sa in Macau. Note that this is the only IIN range issued by Banco Nacional Ultramarino Sa, so all cards issued by this provider will be of the format 4511 87XX XXXX XXXX. For more information, call Banco Nacional Ultramarino Sa at (532) 833-5533.

Banco Nacional Ultramarino Sa
credit card chip
4511 Valid Thru 08/2025
John Q. Cardholder
Card Scheme Visa
Bank Name Banco Nacional Ultramarino Sa
Card Type CREDIT
IIN 451187
Card Number 4511 87XX XXXX XXXX
Bank Phone (532) 833-5533
Bank Country Macau

Anatomy of a Banco Nacional Ultramarino Sa Visa 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 MII

The first digit of the card is known as the MII digit, and indicates the credit card's scheme. In this case, the MII of 4 indicates that this is a Visa card.

Digits 1-6 — The IIN / BIN

The 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 451187 indicates that this card was issued by Banco Nacional Ultramarino Sa in Macau.

Digits 7-15 — The Account Number

Digits 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 Digit

The 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.

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