On June 25, 2011, Social Security changed the SSN assignment process. The information below explains how we established and issued SSNs prior to the new SSN assignment process. We continue to provide it strictly for historical and informational purposes. Please see SSN Randomization for more information on Social Security's new assignment process and how it may affect you.
Since 1973, social security numbers have been issued by our central office. The first three (3) digits of a person's social security number are determined by the ZIP Code of the mailing address shown on the application for a social security number. Prior to 1973, social security numbers were assigned by our field offices. The number merely established that his/her card was issued by one of our offices in that State. See also High Group List of SSN's.
|SSN Area Number||Location|
|577-579||District of Columbia|
|729-733||Enumeration at Entry|
**700-728 Issuance of these numbers to railroad employees was discontinued July 1, 1963.
Any number beginning with 000 will NEVER be a valid SSN.
The information in our records about an individual is confidential by law and cannot be disclosed except in certain very restricted cases permitted by regulations.