Name of ID card number inquiry
For detailed and accurate ID card information, please consult the local public security household registration management department.
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ID card number inquiry address domestic ID card number attribution place inquiry ID card authenticity verification
Introduction to resident ID card
On April 6, 1984, the State Council issued the Tentative Regulations of the People's Republic of China on Resident Identity Cards, and began to issue the first generation of resident identity cards. Since March 29, 2004, the mainland of China has officially started to issue the second generation resident identity cards with contactless IC card smart chips for residents. The second generation identity cards use anti-counterfeit film and printing anti-counterfeit technology on the surface, use personal color photos, and built-in digital chips. Digital anti-counterfeit measures have been taken to store personal images and information that can be read by machines, Identity cards symbolize the residents of the People's Republic of China. They are used for a wide range of purposes. Identity cards are indispensable for going out, such as staying in hotels, buying air tickets, going to Internet cafes, and handling certificates.
Structure and representation of ID card number
1. Number structure
Citizenship ID number is a feature combination code, which consists of a 17 digit body code and a check code. The sequence from left to right is: six digit address code, eight digit birth date code, three digit sequence code and one digit check code.
2. Address code
It refers to the administrative division code of the county (city, flag, district) where the permanent residence of the coding object is located, which shall be implemented according to the provisions of GB/T2260.
3. Date of birth code
It refers to the year, month and day of the birth of the coding object, which shall be executed according to the provisions of GB/T7408. There is no separator between the year, month and day codes.
4. Sequence code
It refers to the sequence number assigned to people born in the same year, month and date within the area identified by the same address code. The odd number of the sequence code is allocated to men and the even number is allocated to women.
5. Check code
(1) Weighted sum formula of 17 digit body code
S = Ai * Wi,i = 2,..., eighteen
Y = mod(S,11)
i: Indicates the serial number of the position from right to left of the number character, including the check code character
Ai: represents the character value of the ID card number at position i
Wi: refers to the weighting factor at the ith position
i：18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
Wi：7 9 10 5 8 4 2 1 6 3 7 9 10 5 8 4 2
(2) Calculation of check code character value
Y：0 1 2 3 4 5 6 7 8 9 10
Check code: 1 0 X 9 8 7 6 5 4 3 2
Coding meaning of ID card number
The old ID card number has 15 digits, and the new ID card number has 18 digits. Added in the third place of 7.8.18.
The first two are provinces. An autonomous region or municipality directly under the Central Government. 3.4 Two digits refer to the city, and 5.6 two digits refer to the county. Digits 7-14 indicate the date of birth. The 15th to 17th digits are sequence codes, and the 17th digit indicates gender. Generally, men are expressed in odd (odd) numbers, while women are expressed in even (double) numbers. The 18th digit represents the verification code, and some also refer to the personal information code, which is generally generated randomly with the computer to verify the correctness of the ID card. Sometimes it is also represented by X, but not necessarily men's singles and women's doubles.
(Citizen ID card number is a combination code of characteristics, which uses the original resident ID card code and consists of 18 digits. The first 6 digits are address codes, the 7th to 14th digits are birth date codes, the 15th to 17th digits are sequence codes, and the 18th digit is check codes. The specific meaning is that the address code represents the administrative division code of the county (city, flag, district) where the citizen's permanent residence is located, The birth date code refers to the Gregorian calendar year, month and day of the citizen's birth. The sequence code refers to the sequence number assigned to people born on the same day, month and year within the area identified by the same address code (odd number is assigned to men, even number is assigned to women). The check code adopts the data processing check code system.)
