Every device on your network has a that the computers in your home use to locate it. You don't need to know your network printer's IP for day-to-day use, but it's one way to to a new computer if the system doesn't detect the printer automatically.
Find the IP in the Control Panel
Search for and open the Devices and Printers Control Panel using the Windows 8 Start screen.
Right-click your printer in Devices and Printers and select Printer Properties from the context menu.
Open the Ports tab and scroll down to find the "Standard TCP/IP Port." Read the IP address from the line, and then close the window. You might need to expand the Port column to read the full address: click and drag the line between the Port and Description columns.
Find the IP Using the Command Prompt
The command prompt also offers a way to find your printer's IP, with the Address Resolution Protocol cache.aspx). To use this method, you need to know the printer's MAC address -- also called a physical address or hardware address -- to match up with the IP. MAC addresses don't change, unlike IP addresses, so you can often find the MAC on a sticker on the printer.
At the , type arp -a and press Enter. Look through the list for your printer's MAC address and read the corresponding IP.