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Everything about HTTP 404

Internet error message

In HTTP, the 404 HTTP status code indicates that a web client was able to communicate with a server, but the server could not provide the requested resource. The server may not have the resource or it may not wish to disclose whether it has the resource. The code is often associated with response reason Not Found and is often referred to as page not found or file not found. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: HTTP 404A 5-minute orientation
  2. Skim a recent paper: https://www.micropress.org/microaccess/micropaleontology/issue-404/article-2385Influential work since 2022
  3. Pick up a classic book: History of the Peloponnesian WarThe most-reprinted book on the subject
  4. Read the landmark paper: HTTP 404-page (not) found: Recovery of decayed URL citationsCited 13 times
  5. Go sideways: List of HTTP status codesA closely related topic
  6. Go sideways: Web serverA closely related topic

📖 Definitions

No dictionary entry for this exact phrase.

🗂️ The subject at a glance

  1. Overview
  2. Soft 404 errors
  3. Microsoft Internet Server 404 substatus error codes
  4. Custom error pages
  5. Tracking 404 errors

🏆 Landmark papers (most cited)

🆕 Influential since 2022

📚 Books worth reading

Ranked by number of editions on Open Library, a rough measure of how lasting a book is.

🔗 Related topics