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Editorial Team
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Asked: 2026-05-31T21:47:10+00:00

I recently discovered that attempting to resolve 127localhost.com on (at least OSX Lion) resolves

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I recently discovered that attempting to resolve 127localhost.com on (at least OSX Lion) resolves to 127.0.0.1, is there a specification or documentation for this available?

I ask because it appears that (at least on OSX Lion) this is only available when a network connection is active (note that the network connection does not have to provide Internet access).

Update:
This question is now somewhat irrelevant because the 127localhost.com domain appears to have expired, for reference vcap.me is an alternative.

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  1. Editorial Team

    I don’t think it is specific to OS X, it is solving to 127.0.0.1 from here too:

    ;; 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.

    Also it looks like it is maintened by a private owner http://who.is/whois/127localhost.com/.

    What kind of documentation are you looking for ? There is not much to say, it is only a domain name who resolves to 127.0.0.1.

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