Skip to content
Pricing RU Sign In
RU
← All Status Codes
451
Client Error

451 Unavailable For Legal Reasons

451 Unavailable For Legal Reasons — the resource is blocked for legal reasons. The code is named after Fahrenheit 451.

Description

The 451 Unavailable For Legal Reasons status code indicates that the server is denying access to the resource as a consequence of a legal demand. The response should include an explanation in the body.

The status code 451 is a reference to Ray Bradbury's novel Fahrenheit 451.

Common Causes

Roskomnadzor block (for RU IPs) GDPR block (for EU IPs without compliance) DMCA takedown EU right-to-be-forgotten Brand disputes

How to Fix

Consider geo-restriction instead of a blanket block — make the page available in other regions. Document legal grounds for audit. If the block is erroneous, appeal to the relevant authority.

Check your website's HTTP status code

Check now →

Related Status Codes

400
400 Bad Request
The server cannot process the request due to malformed syntax.
 401
401 Unauthorized
Authentication is required and has failed or not been provided.
 402
402 Payment Required
402 Payment Required — code reserved for future use, but currently used by some APIs to signal "payment needed".
 403
403 Forbidden
The server understood the request but refuses to authorize it.
 404
404 Not Found
404 Not Found — the requested URL does not exist on the server. The most common client-error; signals search engines to remove the page from index.
 405
405 Method Not Allowed
The HTTP method used is not allowed for this resource.

Related guides

Longer-form reading on this topic from the knowledge base.

Automate this check

Set up continuous monitoring and get an alert when something breaks. No manual runs to remember.

Start free

Start monitoring for free

Sign up and get access to API, monitoring and notifications

Create Account API Documentation