Xfinity speed test results will vary by time of day, connection type and number of other connected devices. If you are far off, call tech support and ask them to check.

Go to and first check the speed tests to see how close you are getting to the speed Comcast advertises.

For example, here's the nearest servers detected by SpeedTest. And to calculate this ping time, it detects the nearest servers and then pings it. To have more details, kindly have a look on SpeedTest, it first calculates the ping time.

I'm implementing a browser extension which should connect to the nearest server to test the ping speed.

If you are unable to locate the error code, please visit our Discussion Forum Community from any Internet-connected device. See the Steps to Resolve Issue section within the article to troubleshoot and resolve your issue. Select the error code article from the search results. ‘XRE-00018’, ‘Unable to Play Video’, etc. Type the error code exactly as you see it into the search bar above.

How to Find and Resolve and Error Code.

Use an Ethernet Cable to connect your PC.

To fix Xfinity upload speed you need to do this basic troubleshooting steps.

Check out our nine steps to improve your broadband speed Keep in mind that your results are just a snapshot of your connection at the time of testing and your speed can be affected by a number of different factors. We do our best to make sure the speed test results are as accurate as possible. If you are not satisfied with the result, we have tips for you below. Then press 'Start measurement' to start the speed test.

After you have configured the settings correctly, go back to the start interface in the speed test.

I registered my new Zoom 5341 modem and the phone rep says my service has been activated.

I Just upgraded from Economy to Blast and my XFinity Speed Test is still posting 1.44 Mb/s.

Comcast speed test