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Check Digit Calculator

Just enter your RIV number to find out the check digit...

Please note: this page does not work with the new ZZ709 prefix - instead please enter 99709 until the page is fixed.

Enter RIV number:
Multiplier: 2 1 2 1 2 1 2 1 2 1 2
Digit × Multiplier:
Unique Digits:
Round up to nearest 10:  
Check Digit:  

Wikipedia page about UIC numbering and Luhn algorithms.