Numident is an acronym for "Numerical Identification System," the Social Security Administration

Social Security Administration

The United States Social Security Administration is an independent agency of the United States federal government that administers Social Security, a social insurance program consisting of retirement, disability, and survivors' benefits...

's computer database file of an abstract of the information contained in an application for a United States Social Security number

Social Security number

In the United States, a Social Security number is a nine-digit number issued to U.S. citizens, permanent residents, and temporary residents under section 205 of the Social Security Act, codified as . The number is issued to an individual by the Social Security Administration, an independent...

(Form SS-5). It contains the name of the applicant, place and date of birth, and other information. The Numident file contains all Social Security numbers since they first were issued in 1936.