What is is a Private IP Address, which is generally by the networking devices and equipments to identify a particular device. As with any other private IP Address can be used by any local network, irrespective of whether it is also used by some other network at some other place. However, it cannot be assigned to two devices within a single network.

What are Private IP Addresses

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

. Router Login and Password Details

Most of the manufacturers of broadband routers and modems allow the users to access their device settings through the use of their web browsers. They have to connect their device to their computer and type the default IP Address in the URL Address bar.

In case your manufacturer has set the default IP Address of your router as, then you can use the tables given below to find out the default login and password for your router.