Khanday Jeelani | Official Blog

24 June 2017  NIIT PROGRAMMERS Why Is Localhost’s IP Address 127.0.0.1? What Is Its Meaning? Short Bytes:  Ever wondered  why 127.0.0.1 IP  address is assigned to localhost? Why not some other IP address like 121.9.1.1 or anything else? The answer to this question lies in the fact that by 1981, 0 and 127 were the only reserved Class A networks. As 0 was used for pointing to a specific host, 127, the last network number, was left for loopback IP address or localhost. Y ou might have definitely heard of 127.0.0.1. You also might be knowing that 127.0.0.1 points to localhost. But, why is localhost ‘s IP address 127.0 .0.1–why not something else? Before trying to answer that question, let me tell you a little bit about how does it work. This address is used to establish a connection to the same computer used by the end-user. When we deal with IPv6 address, it’s defined using the connotation of ::1. As IPv6 addresses take over, localhost will be more commonly know as 0