: Do search engines remove pages from the index for any 400 range status code return? Do search engines remove pages from the index for any 400 range status code return? We are using 400 range

Do search engines remove pages from the index for any 400 range status code return?

We are using 400 range HTTP codes to differentiate messaging for different categories of pages when a particular type of content is not found. There are some concerns that this content will not be removed from the search engine indexes as they would be if a proper 404 response is returned.

Has anyone used this method before to return customized error messages that can validate that these other codes are indeed removed from search engine indexes?

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@Yeniel560

As far as I know: yes. I have some links to my site that generate a 400 status code, and they are not indexed in Google at all.

However as I mentioned in the other question, it's better to stick to defined status codes where possible, like 404 and 410 for missing pages.

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: Do search engines remove pages from the index for any 400 range status code return? Do search engines remove pages from the index for any 400 range status code return? We are using 400 range

More posts by @Caterina187

: How do I differentiate 404 messaging with no dynamic language ability on the web server? Depending on the type of page visited (for example, “static” content vs. product page), we have a

: Even if the client isn't asking for a CMS, I still install one. Partially, it's for consistency. I've been refactoring and improving my CMS for 5 years now, so I've got it to the point

: As the attribute selector is defined in the W3C CSS spec, you should be able to use it. But browsers implementations vary, and are more or less reliable. As you can see on SitePoint Reference

: Is there any reason why a GIF image would show in FF/Chrome and not IE? I've been asked to investigate why the images on a particular site cannot be viewed in IE (6/7 and 8, multiple machines)

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