CHECK DIGIT Generate or Verify a check digit. A check digit is used on credit cards, bar codes, routing numbers, etc. The check digit will verify that a user entered the number in correctly. It does not validate the number, that would be determined by the company or individual who made the numbers.

Select a Check Digit Type Luhn SIN ABA ISBN UPC (A) EAN-8 / UPC (E) EAN-13 EAN-14 SSCC BOL PCD Postnet CAS Registry Number   Generate Check Digit Generate Check Digit Input    result(s) Generate Check Digit Result (Unformated) Verify Check Digit Verify Check Digit Input

 

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