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Check Digit Mod 11 (ISBN-10 check digit)
This online calculator generates and validates check digit with mod11 algorithm, used by ISBN-10
ICAO MRZ Check Digit
This calculator calculates the check digit from the other digits/alphabetic characters in the entered series. The calculation is done according to the algorithm used by ICAO for machine readable travel documents
ICAO MRZ Check Digit
This calculator calculates the check digit from the other digits/alphabetic characters in the entered series. The calculation is done according to the algorithm used by ICAO for machine readable travel documents. The description of the algorithm can be found below the calculator.
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