Conversely, a 5xx error indicates a server-side problem. The server is saying that you’ve done something wrong, such as misspell the URL or request a page which is no longer there. We at the 404 Research Lab like to think of him as The Man Who Made All Of This Possible.īerners-Lee based the HTTP status codes on FTP status codes, which were already well established by 1990 the official FTP spec is dated 1985, although FTP has actually been in use much longer. They were defined by Tim Berners-Lee, the same person who single-handedly invented the web and the first web browser in 1990. HTTP status codes were established by the World Wide Web Consortium (W3C) in 1992, as a part of the HTTP 0.9 spec.

It’s only when you encounter an error that you see the actual status code, such as 404 Not Found. You don’t see this because the server proceeds to send you the contents of the page.

Not surprisingly, your browser has sent the server its own headers, which contain a lot more information about you than you think!įor a normal web page, the status is 200 OK. Before the web page is even displayed in your browser, the web server has sent the HTTP header, which contains the status code. Every time you visit a web page, your computer (the ‘client’) is requesting data from a server using HTTP, or Hypertext Transfer Protocol. Keep your inventory in check with barcode software.Ĥ04 is an HTTP status code. All POS hardware including barcode scanners and barcode printers can be found at National Barcode.

404 error code