First, understand the difference between LAN and WAN IP addresses and why a single computer has two IP addresses.
- LAN network addresses are either self-assigned or provided by the modem/router/wifi via DHCP.
- WAN addresses are supplied by the ISP and typically change upon modem restart.
LAN network allocates IP addresses locally within a specific area, while WAN network allocates IP addresses enabling network connectivity globally. Simply put, LAN IPs resemble room addresses within a house, while WAN IPs represent the entire house compared to others for distinction.
1. How to Check LAN IP Address on Windows 7/8/10
Method 1: Checking LAN IP Address via Interface
Step 1: Right-click on the Network icon at the bottom right corner of the screen -> select Open Network and Sharing Center:

Step 2: A dialog box appears, click on Ethernet (on some machines this icon may have a different name but is located in the same position):

Step 3: The Ethernet Status dialog appears, click Detail to view detailed parameters:

Step 4: The Network Connection Detail dialog appears, it displays all LAN IP information on your computer where the IP4 Address is the LAN IP address, other parameters like server port address, DNS resolution, etc. are not of concern.

- After viewing the LAN IP address on your computer, click Close to close the dialog.
Method 2: Checking LAN IP Address using Command Line
Step 1: Press Window + R to open the Run dialog -> enter cmd -> OK:

Step 2: The cmd window appears, enter the command ipconfig /all:

Step 3: Press Enter all network setup information will be displayed, navigate to Ipv4 Address which is the LAN IP address on your computer:

With these two simple methods, you can view the LAN IP address of your computer.
2. How to Check WAN IP Address on Windows 7/8/10
Method 1: Checking WAN IP Address using a website
Visit a website to check the details of your WAN IP address: https://www.whatismyip.com/ -> Web interface displays -> your WAN IP address is determined:

Method 2: Checking WAN IP Address by accessing your modem
Step 1: Access the address through a web browser: 192.168.1.1 (usually default for home modems, with some others you can enter 10.0.0.1)

Step 2: Enter the user account information and password, usually both are admin (if not, you can check the notes on the modem or contact your service provider). After entering, click OK:

Step 3: The Web interface displays complete information about your connection -> select the Internet tab -> all information about your computer's WAN network is displayed there, with IPv4 Address being the WAN IP address on your computer:

Above is the detailed guide on How to view LAN and WAN IP addresses of a computer on Windows 10, perform similarly for other versions. Wish you success!