What is is one of the Private IP Address out of  a pool of designated set of IP Addresses. Private IP Address is often used by the broadband router manufacturers to enable users to access and modify the device settings in the field. The users have to connect the device to a computer and start their favorite web browser. In the address bar of the browser, this default IP address is to be entered, which will open the settings page of the device.

What is a Private Network and Private IP Address

Early network design, when global end-to-end connectivity was envisioned for communications with all Internet hosts, intended that IP addresses be uniquely assigned to a particular computer or device. However, it was found that this was not always necessary as private networks developed and public address space needed to be conserved.

Computers not connected to the Internet, such as factory machines, routers and other networking rquipments that communicate only with each other via TCP/IP, need not have globally-unique IP addresses. Three ranges of IPv4 addresses for private networks have been reserved. These addresses are not routed on the Internet and thus their use need not be coordinated with an IP address registry.

Today, when needed, such private networks typically connect to the Internet through network address translation (NAT).

IANA-reserved private IPv4 network ranges
Start End No. of addresses
24-bit Block (/8 prefix, 1 × A) 16777216
20-bit Block (/12 prefix, 16 × B) 1048576
16-bit Block (/16 prefix, 256 × C) 65536

. IP Router-Password, Login, Admin Default Settings

Please go through the tables given below. These are the default IP adresses of some of the most commonly used broadband routers and networking devices alongwith their default passwords and usernames.