While researching my father, Robert Gordon Howell, I came across something that immediately caught my attention. Among the many records documenting his life were references to two different Social Security number prefixes: 312 and 457. At first glance, it appeared as though he may have been associated with two different Social Security numbers.
For most people, that would raise an obvious question: How could one person have two Social Security numbers?
As a genealogist, however, I have learned that the first conclusion is rarely the correct one. Rather than assuming an error—or assuming the records were correct—I decided to investigate. That journey led me into the history of the Social Security Administration and introduced me to two of the most valuable records available to family historians: the SS-5 Application for a Social Security Number and the Numident.
The Beginning of Social Security
The Social Security Act was signed into law by President Franklin D. Roosevelt on August 14, 1935, creating a nationwide retirement insurance program for American workers. As the program developed, every eligible worker needed a unique number so that wages and future benefits could be accurately recorded.
Beginning in late 1936, Americans completed an Application for Account Number, better known today as the SS-5. What started as a simple administrative form has become one of the most valuable genealogical records available for twentieth-century research.
Unlike many government documents, the SS-5 was usually completed by the applicant or with information provided directly by the applicant. Because of that, it often contains firsthand information rather than details supplied by relatives many years later.
Why Genealogists Value the SS-5
An original SS-5 application may include:
- Full legal name
- Date of birth
- Place of birth
- Father’s full name
- Mother’s full maiden name
- Employer
- Home address
- Signature of the applicant
For genealogists, few twentieth-century documents provide so much reliable information in one place. When birth certificates are missing or conflicting records exist, the SS-5 often becomes one of the strongest pieces of evidence available.
The Numident
While many researchers are familiar with the SS-5, far fewer have heard of the Numident.
The Numident—short for Numerical Identification System—is the Social Security Administration’s master electronic record for an individual’s Social Security account. It was developed as the agency computerized its records and serves as a lifetime history of a person’s Social Security file.
Unlike the original SS-5, which records information provided when the account was first established, the Numident may document changes made throughout a person’s life. These updates can include:
- Name corrections
- Replacement Social Security cards
- Changes resulting from marriage or divorce
- Corrections to birth information
- Death reporting
- Administrative updates made by the Social Security Administration
For genealogists, the Numident often answers questions that the original SS-5 cannot.
A Research Mystery
While reviewing my father’s records, I noticed references to two different number prefixes: 312 and 457.
Rather than jumping to the conclusion that he had two Social Security numbers, I treated the discovery as a research problem.
Were both numbers actually Social Security numbers?
Was one the result of a transcription error?
Could one have been copied incorrectly onto another record?
Was one associated with a replacement card or an administrative action?
Or was there another explanation entirely?
These are exactly the kinds of questions genealogists should ask before reaching a conclusion.
One of the most important lessons I have learned during years of family history research is that records do not always agree. Government documents contain mistakes. Clerks make errors. Information is copied incorrectly. Sometimes a document raises more questions than it answers.
That is why original records matter.
Following the Evidence
Rather than relying on secondary sources or indexes, I requested copies of the original Social Security records associated with my father’s account. By comparing those records with military files, Veterans Administration records, employment documents, and other contemporary records, I hope to determine exactly why two different prefixes appear and whether they represent an actual discrepancy or a simple misunderstanding.
This investigation is still underway.
Like many genealogical problems, the answer may ultimately prove to be quite simple—or it may reveal an entirely unexpected chapter in my father’s life.
Either outcome will be based on evidence rather than assumption.
Lessons Learned
This experience has reinforced several principles that guide my research.
Never assume a record is correct simply because it is official.
Always compare multiple independent sources.
Whenever possible, obtain the original document rather than relying on an index or transcription.
Allow the evidence—not the theory—to determine the conclusion.
Those principles have served genealogists well for generations, and they remain just as important today.
Looking Ahead
As I continue researching my father’s life, I expect the SS-5, the Numident, and other Social Security records to answer many of the questions that still remain. Whether the mystery of the two prefixes proves to be a clerical error, an administrative correction, or something entirely different, the investigation itself has already demonstrated the value of careful documentation and thoughtful analysis.
Every record tells part of a story.
Sometimes the most important discoveries begin with something as simple as a few numbers on a government form.
For a genealogist, those numbers are rarely just numbers—they are clues waiting to be understood.
Footnotes
- Social Security Administration, “The Story of the Social Security Number,” accessed August 2, 2026, https://www.ssa.gov/history/ssn/ssnchron.html
- Social Security Administration, Application for a Social Security Card (Form SS-5), Social Security Administration, accessed August 2, 2026, https://www.ssa.gov/forms/ss-5.pdf
- Social Security Administration, Program Operations Manual System (POMS): Numident, accessed August 2, 2026, https://secure.ssa.gov/poms.nsf/home
- Social Security Administration, Historical Background and Development of Social Security, accessed August 2, 2026, https://www.ssa.gov/history/
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