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Luhn algorithm - Validate code number

Validate a code number using the Luhn algorithm. Fill in the box below to have it instantly computed.
The Luhn algorithm, a simple checksum verification algorithm, is also known as Luhn formula, modulus 10 algorithm, or mod 10 algorithm.
It is most notably used to validate credit card numbers and IMEI phone identification numbers.

Code (numbers only) with check digit
Partial code without check digit
Check digit