IP address lookup and information tool

Here you can find all lookup results for loopback IP address which is located in, a reserved range for loopback addresses to the local host (RFC 6890).

IP address is registered as a loopback interface address, which is also known as localhost or local host. In computer networking, localhost is a hostname that means this computer. It is used to access the network services that are running on the host via its loop back network interface. Using the loop back interface bypasses any local network interface hardware.
This type of address is also used as a means to validate that a locally connected physical networking card is working as expected and the TCP/IP stack is installed.

This local mechanism is useful for testing software during development, independently of any networking configurations. For example, if a computer has been configured to provide a website, directing a locally running web browser to http://localhost or may display its home page.

Technical details

IP address127.0.0.27
Address type Loopback
Protocol versionIPv4
Network classClass A
Conversions 2130706459 (decimal / iplong)
7f00001b (hex / base 16)
1270027 (numeric)
Reverse DNS
CIDR block127.0.0.0/8
Network range127.0.0.0-
Network ID
Broadcast address