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A country code and a checksum.
Also known as: International bank account number, IBAN format
The international bank account number, structured with a country prefix and two check digits.
Identifies a bank account internationally, with a country code and two check digits before the national part.
Contexts: Public information
The check digits are computed over the whole rest of the number with the country code moved to the end, so a transposed pair of digits anywhere in the account number fails the check — the commonest human error is exactly the one it catches.
Contexts: Public information
Length varies by country, so an IBAN's length is itself a weak check on its country code.
Contexts: Public information
Two letters naming the country, two check digits, then a national account identifier of country-specific length, conventionally printed in groups of four.