If you’ve ever typed localhost in your browser or seen 127.0.0.1 in configuration files, you’ve encountered one of networking’s most fundamental concepts: the loopback address. This special IP address is your computer’s way of talking to itself, and understanding it is crucial for anyone doing development work.
Summary What is 127.0.0.1? The address 127.0.0.1 is the standard IPv4 loopback address that always points to your own computer. It’s the IP address behind “localhost” and enables local network communication without ever leaving your machine.