IBAN Validator

Validate IBAN numbers with country length, format, and checksum checks.

IBAN
Validate IBAN numbers with country length, format, and checksum checks.
Validation Result
Validate IBAN numbers with country length, format, and checksum checks.
Validation Result
Validate IBAN numbers with country length, format, and checksum checks.

What is IBAN?

IBAN (International Bank Account Number) is a standardized identifier for bank accounts used in international payments.

IBAN Structure

An IBAN starts with a two-letter country code, two check digits, and a country-specific BBAN.

Checksum Validation

IBAN validity is checked with the ISO 13616 mod-97 algorithm.

  1. Remove spaces and move the first four characters to the end
  2. Convert letters to numbers (A=10, B=11, …, Z=35)
  3. Compute mod 97; a valid IBAN leaves a remainder of 1

Each country defines a fixed length and structure for the BBAN portion.