IMEI Calculator & Validation

Calculating the IMEI check digit (Luhn)

An IMEI has 15 digits, and the last one is not arbitrary: it is a check digit derived from the preceding fourteen by the Luhn algorithm. That is what makes a mistyped IMEI detectable without querying anything.

Enter 14 digits to have the check digit calculated, or 15 to verify an IMEI you already have. The calculation runs entirely in your browser — nothing is transmitted.

A failed check almost always means a transcription error rather than a fake device. Correct the number and run the device check afterwards to see the actual status.

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