Chinese ID Number Validator (身份证)

Validate an 18-digit Chinese resident ID number (身份证号码): check digit, date of birth, sex and province, and generate test numbers. Free, in your browser.

Generate test numbers
Generated numbers are fictitious and only for testing software and forms. Using them to pass yourself off as someone, open accounts or register anything is illegal.
What it does
The resident identity card of mainland China (居民身份证) has an 18-character number: six digits for the region where it was first registered, eight for the date of birth (YYYYMMDD), three for the order of registration (odd for men, even for women) and a check digit from 0 to 9 or X, calculated with the ISO 7064 MOD 11-2 method. This page checks the province, the date and the check digit.
Everything happens in your browser: the numbers you type are not sent or stored.
Frequently asked questions
Does a valid number mean that the person or company exists?
No. It only means the check digits are correct, which catches typing mistakes. Whether the number was actually issued, and to whom, can only be checked with the authority that issues it.
What are the generated numbers for?
For testing: filling in forms in development, testing databases and validation code. They are made at random with correct check digits, so by chance one may coincide with a real number. Never use them to identify yourself, sign up for anything or deceive anyone.
How does a check digit work?
It is calculated from the other digits with a fixed formula, usually multiplying each digit by a weight and taking the remainder of a division (modulo 11, or modulo 23 for the Spanish DNI letter). If one digit is typed wrong or two are swapped, the check digit no longer matches.
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