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I have noticed some sites with the url www-0. How is this possible? I assume this is a DNS trick? If so, what benefit does this have?

Any information on this is appreciated.


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closed as not constructive by Zoredache, ceejayoz, Alex, Bryan, mdpc Jan 5 '13 at 2:23

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What part confuses you? Creating a dns name for www-0 is the same as creating a name for asdf. – Zoredache Jan 4 '13 at 17:36
up vote 2 down vote accepted

They are subdomain, just like www would be.

It's not really a "trick" but a rather a very basic feature of DNS.

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