How long does a reverse DNS lookup take?

Posted by HansA on Stack Overflow See other posts from Stack Overflow or by HansA
Published on 2010-03-15T03:01:24Z Indexed on 2010/03/15 3:09 UTC
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How long should I expect a reverse lookup take? 100 milliseconds? 1 second? 10 second? 30 seconds? What's your experience?

Why? We're debating adding a feature to our server software which would require a reverse DNS lookup each time a client connects. The lookup would be done synchronously, so I'm worried that it could slow connection-times down a lot. I just wanted to hear other people's experience regarding reverse DNS lookup times.

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Developer IT

How long does a reverse DNS lookup take? - Developer IT

How long does a reverse DNS lookup take?

reverse-dns

Related posts about reverse-dns

Reverse DNS does not match SMTP banner vs Reverse DNS mismatch

What is reverse DNS?

Reverse DNS Lookup from the Command Line

How long does a reverse DNS lookup take?

Creating reverse DNS entries which resolve [closed]

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