Structure of The NRIC Number/FIN
The structure of the NRIC number/FIN is #0000000@ where:
#
- This is a letter that can be "S", "F", "T" or "G" depending on the status of the holder.
- For Singapore citizens and permanent residents, this is the century prefix.
- The NRIC number for citizens and permanent residents born before the year 2000 is assigned the letter "S". "S" is the 19th letter in the English alphabet, denoting that the person was born in the 1900s (1900–1999). It was commonly believed before 2000 that the "S" stands for Singapore, especially since the letter "F" was used for foreigners. It is unknown, however, if that was ever the intended meaning.
- Singapore citizens and permanent residents born in 2000 and beyond are assigned the letter "T". "T" is the 20th letter in the English alphabet, denoting the person was born in the years 2000–2099.
- Foreigners holding employment or student passes issued before 2000 are assigned the letter "F".
- Foreigners holding employment or student passes issued in and after 2000 are assigned the letter "G".
0000000
- This is a 7 digit serial number assigned to the document holder
- For Singapore citizens and permanent residents born in 1968 and after, their NRIC number will start with their year of birth e.g. 71xxxxx#. For those born in 1967 and earlier, the NRIC number does not relate to year of birth, and commonly begins with 0 or 1. Non-native Singaporeans who were born before 1965 are assigned the heading numbers 2 or 3 upon conversion of permanent residency (PR) or citizenship.
@
- This is the checksum letter calculated based on # and 0000000.
The algorithm to calculate the checksum of the NRIC is not publicly available; as of 1999, the Ministry of Home Affairs only sold the algorithm to Singapore-based organizations demonstrating a "legitimate need" for it. That said, the checksum algorithms for the NRIC (S- and T-series) and the FIN have been easily reverse-engineered, such as described by Ngiam.
Read more about this topic: National Registration Identity Card
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