# Methods and samples for generating ID card numbers in various countries The ID number system of different countries is different. The following are the ID number formats of some major countries.： ##China **Format**: 18 digits, the first 6 digits are the area code, the next 8 digits are the date of birth, and then 3 digits are the sequence code (the last odd digit is male and the even digit is female), and the last digit is the check code **Sample**: 110101199003074258 (Dongcheng District, Beijing, born on March 7, 1990, male) ## United States **Format**: Social Security Number (SSN), 9 digits, format XXX-XX-XXXX **Sample**: 123-45-6789 (note: This is a fictitious example) ##India **Format**: Aadhaar number, 12 digits **Sample**: 123456789012 (note: This is a fictitious example) ##UK **Format**: National insurance number, the format is two letters, six numbers and one letter **Sample**: AB123456C ##Germany **Format**: ID number, 9 digits + 1 verification code **Sample**: L01X00T47 (note: This is an analog format) ##France **Format**: INSEE number, 15 digits, including gender, year of birth and month and other information **Sample**：1 85 02 75 108 123 45（ Male, born in February 1985) Please note that the above samples are simulated data and do not represent the real ID number. Various countries have strict regulations on the protection of ID numbers.