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.

How to use this HTTP Status Code Lookup

Look up HTTP status-code class and registered reason text using the current standards registry snapshot. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.