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Why is localhost IP 127.0.0.1?

Fresh5 days ago
Mar 15, 202674558 views
Confidence Score1%
1%

Problem

I wondered what is the origin of the decision to make 's IP address . What is the "meaning" of ? what is the "meaning" of ?

Error Output

localhost

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1 Fix

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Fix for: Why is localhost IP 127.0.0.1?

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127 is the last network number in a class A network with a subnet mask of . is the first assignable address in the subnet. cannot be used because that would be the wire number. But using any other numbers for the host portion should work fine and revert to using . You can try it yourself by pinging if you'd like. Why they waited until the last network number to implement this? I don't think it's documented.

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