What does DNS flushing do


I came across a website that instructed me to flush my DNS in order to view what was online. What does this do and why would it help display the website?

Best Answer

DNS is the Domain Name System. DNS servers convert a domain name (such as example.com) into an IP address (in this case The mapping of names to numbers can change from time to time.

Your computer holds a record of DNS entries to save looking them up every time. This is your DNS cache. You can delete those records (flush the cache) any time you like.

If a website has recently moved servers, you might see the old website for a while. Flushing your DNS cache might help.

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