Service Number (SN) and Social Security Number (SSN)
Service numbers and social security numbers are used at NPRC (MPR) as part of the identifiers used to store and locate records.
Social Security Number (SSN). Always include the veteran's social security number on a request.
Service Number (SN). Also include the veteran's service number on a request if service was during the period when service numbers were assigned as personal identifiers. The military services discontinued using the service number as an identifier and began using the social security number on the following dates:
| Branch of Service | Date of Changeover |
|---|---|
| Army and Air Force | July 1, 1969 |
| Navy and Marine Corps | January 1, 1972 |
| Coast Guard | October 1, 1974 |
"NARA ensures, for the Citizen and the Public Servant, for the President and the Congress and the Courts, ready access to essential evidence."
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