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423 ·Locked

The resource is locked and cannot be modified (WebDAV).

Client ErrorRFC5218#10.4

Quick facts

Status423
PhraseLocked
TypeClient Error
SpecificationRFC5218#10.4

When does it occur

What does HTTP 423 mean?

The resource is locked and cannot be modified (WebDAV).

It belongs to the 4xx Client Error class of responses, defined in RFC5218#10.4.

Browse all codes in this class: 4xx Client Error

Common causes

  • The request or resource does not meet requirements
  • Client-side validation or routing problem

Frequently asked questions

Is HTTP 423 cacheable?

423 belongs to the 4xx Client Error class and is generally not cached for long; behavior is controlled by Cache-Control.

What does the 4xx class mean?

4xx Client Error: The resource is locked and cannot be modified (WebDAV).

Sources & standards

Updated 2026-09-13

Explore this reference

4xx responses

4xx
Client Error

Related status codes

424
Failed Dependency
409
Conflict
400
Bad Request
401
Unauthorized
402
Payment Required
403
Forbidden

Related status codes

424
Failed Dependency
409
Conflict
400
Bad Request
401
Unauthorized
402
Payment Required
403
Forbidden

about this tool

About This Tool

This page provides original, human-reviewed information about HTTP status codes such as 423, 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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