Obviously when a website disappears Google etc will stop indexing it at some point, but is there some way for a web server to provide a more formal response indicating that a website is permanently closed, such as setting it to return a particular http status code?When I try to open in Chrome a website I closed recently I get (actual domain swapped to example.com):This site cant be reachedThe webpage at http://example.com/ might be temporarily down or  it may have moved permanently to a new web address. Search Google for  example com ERR_NAME_RESOLUTION_FAILEDWith the above kind of error (which may be temporary), it may take some time for search engines to stop retrying a crawl of the site before it gets deindexed. Ideally I'm interested in a way of speeding up that process.
How to indicate to search engines that a website is permanently closed?
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