What Is Used For?

Devices using are behind a private network

What is used for?

 alxpin / Getty Images is a private IP address sometimes used on local networks. It's the second IP address in the range starting at, sometimes called the network. Home network broadband routers sometimes use an IP address range that includes the address. Some of these manufacturers include Belkin, SMC, Dell, Edimax, and Gemtek. A router can assign to any device on the local network automatically or an administrator can do it manually.

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What Is Used For? 

Computers and other devices that support DHCP receive their IP address automatically from a local router. The router decides which address to assign from the range it is set up to manage.

When the router uses the range through, it takes one address for itself (usually and maintains the rest in a pool. Normally, the router will assign these addresses in sequential order (starting with and then in this example), but the order is not guaranteed.

Manual Assignment of

Most devices can be configured to have a static IP address. This includes computers, phones, gaming consoles, and others. This is done by manually entering the IP address on the device. Some routers also support DHCP reservations so that the IP address can be associated with the MAC address of a device, essentially creating a static IP for that device.

However, entering the IP number does not guarantee the address is valid for the device to use because the router must be configured to include in its address range.

How to Access a Router

If a router is assigned, it means all of its connected devices use that router as the default gateway. This normally isn't the case since is typically an address assigned to the devices that connect to a router. However, the administrative console is accessed through the router's URL, which is

Problems With

IP address conflicts occur when multiple devices are assigned the same IP address and can cause failed connection issues for the devices involved. This is usually avoided when DHCP is used but is much more likely to happen when the address is assigned as a static IP address.

A device with IP address dynamically assigned to it may be re-assigned a different address if it is disconnected from the local network for a long enough time period. The length of time, called a lease period in DHCP, varies depending on the network configuration but is often two or three days.

Even after the DHCP lease expires, a device may receive the same address the next time it joins the network unless other devices also had their leases expire.

If your network is configured where two routers are connected together, it's possible to set up the second router with the IP address. However, the address should be reserved in the first router so that DHCP doesn't give the second router a new address later on and cause problems with its connected devices.