# Social Security number

> nine-digit number issued to U.S. citizens, permanent residents, and temporary working residents

**Wikidata**: [Q5612679](https://www.wikidata.org/wiki/Q5612679)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Social_Security_number)  
**Source**: https://4ort.xyz/entity/social-security-number


## References

1. [Source](https://www.ssa.gov/history/1930.html)
2. Freebase Data Dumps. 2013
3. [Source](https://eservices.paychex.com/secure/HRO_PNG/ssn_itin_fed_id_other.html)
4. KBpedia