How Do I Determine IP Address of My Comcast Modem?

It is important to know the IP address of your Comcast modem as it plays a crucial role in having access to the web interface, troubleshooting the network, optimizing the internet service connection, and, most importantly, offering great control over the privacy settings and network security.

So, to find the IP address of the Comcast modem, you can visit an online IP-checking website and connect it to the router. You can access the web interface and look in the settings section for the IP address currently assigned to your Comcast modem.

Determining IP Address of Comcast Model

Step 1- Open a web browser on your computer that is connected to the modem or to the router that is connected to the modem. 

Step 2- Use an online IP checking website where the IP address displayed on the site will be the IP address that is currently assigned to your modem.

Step 3- Connect your computer directly to the Comcast modem by clicking Start then C in the Run window.

Step 4- Wait for the command prompt to appear and then type “ipconfig” in the Run window.

Step 5- Look at the IP address that has returned, which is the current IP of your Comcast modem.

Step 6- After connecting your computer to the router, open the web interface of the modem and look at the settings of the router which is connected to the Comcast modem.

Step 7- The currently assigned IP address of the Comcast modem will be displayed.

Finding Out Your Comcast IP Address

Step 1- Open your browser.

Step 2- Type “192.168.100.1” into the address bar. (Note- Check your Comcast manual for the IP address of your modem if this address fails to resolve)

Step 3- Press Win-R and type “cmd” (without quotes) alternatively.

Step 4- After typing press Enter to open a command prompt window.

Step 5- Type “ipconfig” and press Enter.

Finding Your Current Comcast IP Address and Checking Whether It is Static or Dynamic

Step 1- Open the start menu in Windows

Step 2- Select Run and type command and click Ok

Step 3- Type “ipconfig/all” at the blinking cursor and press Enter.

Step 4- Try to look for the entries near the end of the list- DHcpEnabled.

Step 5- To exit type “exit” at the blinking cursor and press Enter.

Finding the Xfinity IP Address of Your Modem

Step 1- Click the start button of the Windows

Step 2- Press the Enter button after typing “cmd” in the search box to open the command prompt

Step 3- To run the command, type "ipconfig/all" in the command prompt and press Enter.

Step 4- Locate the default gateway line where the IP address of a modem is the IP list on the default gateway line.

Can Comcast Change the IP Address?

Yes, unless you have purchased a static IP address from them you cannot prevent Comcast from changing your IP address. Therefore, they will likely issue a new IP address whenever you change your router / MAC.