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Index of U.S. Government Departments and Agencies (US-USAGOV)


The U.S. Government website has an index of departments and agencies. This index can be searched, and the URL paths for agencies used to construct government agency identifiers.

  • Coverage: US

Find and use identifiers

Use the final segment of the url (below /federal and excluding the extension) as the “registration number”, converting all “-” to “_”. Keep “registration number” portion all lowercase.


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