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Is there a specification or documentation for 127localhost.com

I recently discovered trying to resolve 127localhost.com

on (at least OSX Lion) to 127.0.0.1, is there a specification or documentation for this?

I am asking because it seems that (at least on OSX Lion) this is only available when the network connection is active (note that the network connection should not provide Internet access).

Update: This question is somewhat irrelevant right now as the domain 127localhost.com

appears to have expired as the link vcap.me

is an alternative.

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2 answers


I don't think it is OS X specific, it also solves 127.0.0.1:

;; QUESTION SECTION:
;127localhost.com.              IN      A

;; ANSWER SECTION:
127localhost.com.       86373   IN      A       127.0.0.1

NS records:



;; ANSWER SECTION:
127localhost.com.       86400   IN      NS      dns16.ovh.net.
127localhost.com.       86400   IN      NS      ns16.ovh.net.

It also looks like it is maintained by a private owner http://who.is/whois/127localhost.com/ .

What kind of documentation are you looking for? Not much to say that only the domain name permits 127.0.0.1

.

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It works simply because someone registered that name!



You don't have to rely on it - they can change the address it points to, such as a site containing a browser exploit ...

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