My Number check digit
The My Number check digit, worked out.
Output
Paste or type above to see the result here.
Your files stay on your device
This tool runs entirely in your browser. What you paste is processed on your device and is never sent to a server, so it is safe to use with tokens, keys and unpublished text.
How it works
- Paste one number a line; dots, dashes and spaces are fine.
- Each is checked for its length and its check digits.
- The result shows each step of the calculation, and where a number fails.
Frequently asked questions
- How is the My Number check digit calculated?
- The first eleven digits are multiplied, in order, by 6 5 4 3 2 7 6 5 4 3 2 and summed; 11 minus the remainder of the sum divided by 11 is the check digit, or 0 when the remainder is 0 or 1.
- Should I type my real number here?
- It never leaves your browser — but a My Number is sensitive, so check only what you must.
- Does a valid check digit mean the number exists?
- No — only that it is correctly written. Whether it was issued, and to whom, only the issuing authority can say. The checker never makes up numbers either: it checks the ones you type.
- Is anything uploaded?
- No. The check is worked out in your browser, and nothing you type leaves your computer.
Made for a specific use
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