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About This Item


Full Description

This standard establishes a structure for the assignment of identifying data codes to counties and county equivalents of the United States and its insular and associated areas, for the purpose of information interchange among data processing systems.

Document History

  1. INCITS 31-2009

    👀 currently

    Information technology - Codes for the Identification of Counties and Equivalent Areas of the United States, Puerto Rico, and the Insular Areas

    • Most Recent
  2. INCITS 31-1988 (R2007)

    Structure for the Identification of the Counties and County Equivalents of the U.S. and Its Outlying and Associated Areas for Information Interchange (formerly ANSI X3.31-1988(R1994))

    • Historical Version