192.168.0.100 - IP Address for Local Networks

Any device on a local network can use the IP address 192.168.0.100

192.168.0.100 is a private IP address, meaning that it is used exclusively on private networks where it would be the IP address of either the router or one of the devices on the network. 

Router manufacturers assign their routers a default private IP address. The address 192.168.0.100 is not a common router address, but a few broadband router models and access points do use it (as well as other devices), including some Netgear models and some printers by SerComm and USRobotics, among others.

Use this IP address to configure your router or other device by accessing its administrative console.

How Private IP Addresses Work

Private network IP addresses cannot be accessed from the internet directly, but can be used to allow any device on a local network can connect to any other device also on that network.

The Internet Assigned Numbers Authority (IANA) manages IP addresses and has reserved certain number blocks to be private. These are:

  • 10.0.0.0 - 10.255.255.255
  • 172.16.0.0 - 172.31.255.255
  • 192.168.0.0 - 192.168.255.255

Private IP addresses cannot be used by any website or device on the wider internet or other local networks. For example, a ping to this address will work if generated by another device within the local network, but will not work if attempted from outside the network.

For this reason, private IP addresses do not need to be unique except within their own local network. 

Note that there is nothing special about any particular private IP address – a device on a local network does not gain improved performance or better security from having 192.168.0.100 as its address compared to any other private address.

Accessing Your Router's Administrative Console

You can configure your router or other device by accessing its administrative console. Generally, this should be unnecessary since your device's default settings are usually appropriate. However, if you do wish to configure your router – for instance, to change its default IP address or to assign a specific address to a device on your network – you can access it by entering its IP address into a browser's URL address bar, like so:

http://192.168.9.100

This launches your device's admin panel. You are prompted to enter a username and password combination. Routers come with default username/passwords.  Usernames are usually "admin" or "user", while passwords might also be "admin", "user" or also "1234". Some manufacturers' devices ship with no default usernames or passwords, so you can access their console simply by clicking through this dialog.

If You Don't Already Know

Warning: Always set a username and strong password in your router's admin console to prevent someone on your local network from changing settings.

Finding Your Device's IP Address

Your device's IP address is usually printed on the box or on the bottom of the device. If you can't find it, you can access it from your computer.

Router Default IPs:

To find your router's default IP address, use Window's ipconfig utility:

  1. Press Windows-X to open the Power Users menu.
  2. Click Command Prompt.
  3. Enter ipconfig to display a list of all your computer's connections.

Your router's IP address is listed under the section "Local Area Connection" and is identified as the "Default Gateway." 

Printer Default IPs:

You can usually get your printer's default IP by accessing Devices and Printers in the Control Panel, right-clicking on the printer and choosing Printer Properties.

Usually, the IP address is displayed in on the General tab's Location field, or on the Ports tab.

Automatic Address Assignment of 192.168.0.100

A common use of the address 192.168.0.100 is a router automatically assigning it to a device on its network. For example, administrators sometimes configure routers that have 192.168.0.1 as their default address to use 192.168.0.100 as the starting address of their DHCP range. This enables the first device on the network to get an address that ends in an easier-to-remember round number (100) rather than the next address in the sequence (2). Alternatively, administrators sometimes configure the router's client IP range as 192.168.0.2 - 192.168.0.99, leaving 192.168.0.100 available for static IP address assignment.

Manual Assignment of 192.168.0.100

Most network devices including computers and game consoles allow setting an IP address manually. The text "192.168.0.100" or the four digits 192, 168, 0 and 100 must be keyed into a configuration screen on the device. However, simply entering this number does not guarantee it will work for the device. The local network router must also be configured to include 192.168.0.100 in its IP address range. You can view the IP address range in the administrative console as discussed above.

Avoiding IP Address Conflicts

Administrators should avoid manually assigning this address (or any address) that belongs to a router's DHCP address range. Otherwise, IP address conflicts can result as the router may assign an address that is already being used. Check the router's console settings to determine the DHCP pool it has defined. Routers define this range using a combination of several settings including

  • Network mask - the router's subnet defines the minimum and maximum private IP address allowed. For more, see Working With Subnet Masks.
  • Start address - the beginning number of the range (used to further limit within the subnet).
  • Maximum number of clients - an additional limit some routers enforce in addition to the mask.