192.168.0.103 is a class C IPV4 address that belongs to the block of private addresses inside this class. It’s not routable on the internet and it can be assigned to different devices connected to a local area network (home wi-fi network, corporate network, etc.). It’s not one of the addresses that manufacturers assign to their routers, modems, printers, and other devices but if it’s one of the addresses in DHCP pool, it can be assigned to any device connected to a home network either automatically (dynamic IP) or manually (static IP).
192.168.0.103 – Dynamic IP Address
If your router’s default gateway is 192.168.0.1, 192.168.0.10, or 192.168.0.100, and the range of available addresses in the DHCP pool is set in the way that includes 192.168.0.103, this address can be assigned to your device but it doesn’t have to be. If it’s the first available IP address in the DHCP pool, this address will be assigned automatically to the first device that gets connected to the network but only if the assigning is done in a sequential order (and it’s not always like that). If you want this address assigned to your device at all times, you can always assign it manually (read the next section).
192.168.0.103 – Static IP Address
So, if you want this address assigned to your device every time, you will have to assign it manually and make it static (disable automatic DHCP assigning for your device). In order to manually assign 192.168.0.103 to your PC, printer, or some other device, you will have to reserve this address in DHCP pool (go to router’s configuration page and then to DHCP settings). You can also do that through the TCP/IP properties (network and sharing center/change adapter settings/wireless connection properties/TCP/IPV4 properties/Use the following IP address) and enter the IP address. If you want to assign this address manually to some device, check if the address is already taken. If it’s already assigned to some device and you still assign it your PC, you will cause an IP conflict and both devices will be disconnected from the network. You won’t be able to connect them again until you resolve the IP conflict.