DNS Server Not Responding Comcast [Fix Instantly Clarified]

This is an in-depth guide that helps to fix DNS server not responding Comcast instantly with clarified reasons and causes behind the error. Sometimes, it even shows a white screen on the browser that says “Please Connect to a Network”. If you got Comcast internet that is not working, this article will show remedies so that it starts transmitting data once again.

how to fix dns server not responding comcast

So, to properly start, we need to identify the cause of the problem first. Is it due to the fact that your cable is broken or just the router is damaged? Well, we’re publishing this just to show how to get rid of Comcast not working problem. Could it be any other software-related root causes?

Let’s solve it.

DNS Server Not Responding Comcast Fix

Comcast Cable Communications, LLC, also known as Xfinity is an Internet Service Provider company located in Philadelphia, Pennsylvania. It has been operating business since 1981 with a quite good reputation and huge subscribers in the service areas. The brand has grown over the year reaching huge success and having a worth of more than $50 billion dollars already.

Getting back to the topic, the Domain Name System (DNS) is a unique number like the IP Address that resolves to the root where the content of the website is hosted. At a glance, the DNS translates the addresses so that the browser or client can translate them into a live web page or application.

Similarly, the DNS not responding problem means that the server is failing to connect with the domain. Sometimes, it still occurs when the internet is working fine due to the following reasons.

  • Comcast account has problems or is expired, requires renewal.
  • Fiber or wire breakage in the area due to natural calamities, human error, or accidents.
  • Problems in the router, either damaged or needs repair.
  • The website has blocked access, bandwidth limit, or it does not exist. This usually happens when you enter the wrong address or their domain name is expired, the owner forgot to renew it.
  • DNS Cache is full.
  • Outdated firmware and/or network adapters.

1. Fix account problems

Most people ignore this but these types of cables and internet services might still cost you hundreds of dollars every single month. The amount varies depending upon the usage but it is certainly possible that your account might be suspended. Well, this usually happens because of an invalid payment or wrong billing address that is automated.

Therefore, before you jump into the technical solutions, the first thing to do is to log in to the Xfinity portal through mobile data. There you can check whether your account status is active or suspended. The reason could be anything but in case you cannot log in to the website, check emails or notifications on your registered phone. There must be something that explains the cause of the problem which you can fix, either by paying the bills or calling the support to reactivate in case you’re disabled by mistake.

On the other hand, the internet plan that you have chosen might also cause errors due to overload. Therefore, check the number of devices connected to your network. If you find any unknown devices or more than the appropriate number, simply disconnect them. If you don’t have access to those unidentified devices, directly block their mac addresses. Overloading or accessing devices more than allowed limits might result in other devices not getting internet access. Moreover, you can upgrade the package anytime if you want to connect more devices.

2. Reboot Router

Next, if your account is green and everything is okay, try rebooting the router. This is a very genuine and effective technique to solve Comcast DNS server not responding errors. But first, a reboot might not be necessary as you just need to turn off the power button and turn it back on. Still, if the wifi or internet issue is not resolved, reset the modem.

Again, there’s an official app and website for soft-rebooting it. But what if we don’t have access to it or it is no longer working or we cannot find the appropriate settings/options? In that case, we need to hard-reset it in the following ways.

  1. First of all, locate your routers back. There you’ll find a bunch of wires for telephone and ethernet hardline connections. Plus, there’s a coaxial cable that connects the phone line and the internet to the world wide web. Also, don’t forget the power plug that sends the electricity supply to the device for operation.
  2. Just below the coaxial cable, there’s a little hole with a label that says “reset”. In newer models, there’ll be a button. If there’s a hole, use a non-piercing pencil or needle to press the button inside it. Just push the button for 5-10 seconds and release it.
  3. Alternatively, just plug out the power cable and wait for 10-15 seconds before replugging in. After that, wait for one minute and check the indicator lights that should turn green or sky blue depending upon the design.

Now, your Comcast router will reboot after 5 to 10 minutes which should hopefully fix all the DNS errors if there’s no problem with the account as mentioned in the first solution.

3. Repair Wires and Cables

Sometimes, it is super necessary to ensure that the wiring is done correctly and the device is connected to the main data transfer source. If the account is okay and rebooting does not works, it is quite possible that there’s a fiber cable break or wiring is done incorrectly.

On the other hand, external weather such as extremely hot temperatures might cause the melting of fragile wires resulting in a short circuit. It is always a good practice to replace them or inform the ISP about it. Moreover, call your neighbors with the same connection to verify if their internet is working or not. It is possible that the network is under maintenance while you were trying to connect.

4. Try a VPN

Some websites are blocked by the network automatically. This results in DNS errors showing up and you can’t load the page. To verify this, connect to the network from different devices and try opening the same page on different browsers. Also, test the connection by sending requests to other social networks such as Facebook.

If social media is loading and the website you are trying to visit is not, then it may be blocked. In this case, if it is that important at an elite level, feel free to use a VPN connection. It will change your proxies, DNS, and IP Addresses to provide a secure connection to the particular website you’re trying to visit.

5. Clear DNS Cache

Generally, in most operating systems, the DNS cache can store up to 30,000 entries if there’s no regular maintenance. Now, if the entries exceed beyond that number, there’ll be errors. For Windows 10, Press the Windows + R button and type cmd followed by the enter key. After that, execute the following line commands one by one.

  • netsh winsock reset catalog
  • ipconfig /flushdns
  • ipconfig /release
  • ipconfig /renew
  • netsh int ip set DNS

In some computers, you might have to run the command prompt as an administrator. Just go to Cortana search box and type the cmd keyword. After that, right-click on the command prompt icon and select “Run as administrator”. Also, after successfully running the above commands, it is essential to restart the computer.

Likewise, there’re different sets of solutions for MacOs with the steps mentioned below.

  1. Press the hotkeys Command + Spacebar.
  2. Type in “Terminal” without double quotes and click on the terminal icon twice.
  3. Inside the console, execute this command: sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
  4. If prompted, then enter your admin password after processing the command.

This will safely clear all the DNS cache from your Mac operating system. Similarly, we have tested the following method for Android. It works in Brave and Chrome browsers.

  • Launch the browser.
  • Type this in URL Field field and press enter: chrome://net-internals/#dns
  • Tap on “Clear host cache”.

In this way, we can safely clear the DNS cache on various operating systems.

6. Use alternate DNS Addresses

The methods to access this setting varies from device to device based on the OS they are using. Below are the steps for Windows 10:

  1. Launch Control Panel > Network and Internet > Network and Sharing Center > Change adapter settings.
  2. Right-click on your network and select “Properties”.
  3. Check “TCP/IPv4” option and select properties again.
  4. Now use the following alternative DNS addresses and press “OK”.

Preferred DNS Address:

Alternate DNS Server:

A computer restart might be necessary after this.


7. Other Solutions

Still, if there are DNS issues, we recommend the following alternate solutions.

  • Connect to a different network and update all the network drivers, router firmware, and software associated with it. Sometimes, it is not a problem with the WiFi but the connected device itself. So, you can download and install the appropriate driver from the manufacturer’s official website and then import it to the affected device.
  • Try disabling any antivirus or firewall programs that might be preventing the connection at your own risk.
  • Contact the Comcast support team for assistance, replace the hardware if necessary.


We hope that the above solutions about DNS server not responding Comcast work for you. If none of the above solutions work, then contacting the support team is the last option. Let them have the headache and you take a rest. However, in most cases, it is due to the internet being broken from the ISP side due to the cables outage.