The resource is unavailable for legal reasons, such as a takedown order.
Quick facts
When does it occur
The resource is unavailable for legal reasons, such as a takedown order.
It belongs to the 4xx Client Error class of responses, defined in draft-ietf-httpbis-legally-restricted-status.
Browse all codes in this class: 4xx Client Error
Common causes
Frequently asked questions
451 belongs to the 4xx Client Error class and is generally not cached for long; behavior is controlled by Cache-Control.
4xx Client Error: The resource is unavailable for legal reasons, such as a takedown order.
Sources & standards
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This page provides original, human-reviewed information about HTTP status codes such as 451, the HTTP Status Code Reference and related concepts. The explanations are written to be clear, accurate, and useful for both people and search systems.
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