HTTP Status Code Lookup

Check a 100–599 HTTP status code locally and distinguish registered values from unassigned or extension values.

HTTP status code

Quick examples

—Registry description

—Class

—Registry status

100–599Valid code range

ReadyRegistry snapshot includes standard, extension, unused, obsolete, and the current temporary 104 registration represented by this build.

Local analysis is not remote verification

Unless a tool explicitly has a direct-fetch action, these HTTP tools do not contact endpoints. Browser fetch cannot bypass CORS, and generated policy text does not prove how a deployed server, browser, proxy or CDN will behave.