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Internet Speed Test

The easiest way to check your Cox High-Speed Internet connection using your computer or mobile device.

When you're finished, don't forget to rate the Speed Test functionality and recommend our services!

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Test Your Cox Internet Speed

We recommend that you run the test on a laptop or desktop computer connected directly to your Cox modem, which typically provides more accurate results than tablets and smartphones. For additional assistance, review the Speed Test FAQs.

Connect to Modem

Connect your laptop or desktop computer directly to your Cox modem via an ethernet cable.

Disconnect Wi-Fi

Disconnect your WiFi router from the modem or turn off your WiFi if using a 2-n-1 router/modem.

Close Applications

Close all applications, including streaming video/music and gaming systems.


Sign In

Sign in to your account to compare the Speed Test results to your Internet plan.
Sign In to compare the speedtest results to your plan

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Test Results
Download Upload



My Internet Plan
Download Upload



Speed Test Results
Device Type Latency
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IP Address Test Server
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What's Next?

If you continue to have problems with your Internet connection, here are a few options:


Restarting the Speed Test may provide different results.  Learn More

Check for Outages

There may be a Network Outage in your area or a specifc In-Home issue.

Upgrade Service

Need faster Internet? Upgrade your plan in just a few clicks.

Upgrade Internet Upgrade Internet

Get Help

If the troubleshooting steps aren't working, feel free to contact us.

Speed Test FAQs

Do I have to Sign In to run the test or connect to a Cox network?

No – it is not required to Sign In prior to starting the Speed Test; however, customers who Sign In first can evaluate the Speed Test results against their Internet plan.  If you attempt to run the test outside of a Cox network (in-home or Wi-Fi), a message will be presented after the test indicating “This tool is intended to test Internet speeds from Cox Networks”

Can I test my Cox Internet speed using my Tablet or mobile device?

Absolutely!  We have designed the Speed Test functionality so that it scales to multiple device types (Desktop, Laptop, Tablet and Phone) and most major operating systems.  Please note that laptop and desktop computers connected directly to your Cox modem typically provide better results than tablets and smartphones.

How do I get the most accurate Speed Test results?

  • Close all applications, including streaming video and music. 
  • Connect your computer directly to your modem.
  • Disconnect your router from the modem or turn off WiFi if using a 2-n-1 router/modem.
  • Laptop and desktop computers connected directly to your Cox modem typically provide better results than tablets and smartphones

Does Cox guarantee my Internet speed will be the same as my subscription tier?

No.  Cox does not guarantee that the results of the Speed Test will match your plan subscription 100% of the time.  This is due to a number of factors beyond Cox’s control which may impact your speed, including (but not limited to) the processing power of your personal computing equipment, applications running on your computer, the nature and quality of your home network connection, third party networks you may be connected to, the performance of the websites you visit and congestion on the Internet.

Why are my Wi-Fi speeds slower than my Wired connection speeds?

There are many variables that could impact your speed when connected to the Internet through a wireless network. For example, microwaves, static electricity, fluorescent lights, windows, wall type and thickness, the distance between the router and the connecting device, band and signal settings, multiple devices on the same channel, and several other factors can impact the speeds you receive when wirelessly connected to the Internet.

These Wi-Fi variables can add substantial delay (latency and throughput) which may result in speed degradation. A wired connection eliminates many of the potential variables of a wireless network, resulting in improved performance and at least eliminating potential causes of Internet speed issues. 

When contacting Cox customer care professionals, one of the first steps in diagnosing Internet connection speed issues is to connect the device being tested directly to the modem.  Doing so may allow our service technicians to diagnose and remedy potential issues much faster.

How does the Cox Speed Test tool work?

The Cox Speed Test (backed by SpeedOf.Me) checks two primary components of your Internet service – Download and Upload speeds.

Download/Upload Speeds

It begins with downloading the smallest sample size (128 KB). While it shows the real-time bandwidth graph, it also watches the download duration. If it takes less than eight seconds, the next sample is tried; otherwise, it continues with the upload test.  Among all downloaded samples only the last one which took more than eight seconds will be accepted and your download speed is actually based on the last sample file.

Smart Test Method

In order to guarantee that your Internet connection is tested thoroughly, SpeedOf.Me tests your bandwidth in several passes. Sample file sizes increase gradually until it takes longer than eight seconds to download the sample file. As a result, SpeedOf.Me, unlike other speed tests, is able to measure connection speeds in a wide range – from a slow 10 Kbps Mobile GPRS to a very fast 100 Mbps cable user (or even higher) – automatically. Sample files are in the following sizes: 128 KB, 256 KB, 512 KB, 1 MB, 2 MB, 4 MB, 8 MB, 16 MB, 32 MB, 64 MB and 128 MB.

In addition to Download and Upload speeds, the tool provides additional information about the Latency of the connection, your current IP Address, the tool’s test server location and an approximation of the device being tested.

Does the location of my wireless equipment (routers, gateways, access points, extenders) affect WiFi performance?

Yes, for optimal performance, place the wireless gateway or router in:

  • A central location where client devices will most likely be used
  • An elevated location, such as a higher shelf, where laptops have a line of sight view
  • A vertical position

Areas to avoid include:·        

  • Near other interference sources (such as microwaves, high powered appliances, 2.4 GHz cordless phones or other wireless devices close to other Wireless Access Points)
  • Basements
  • Next to other Wireless Routers
  • Near metal objects and surfaces
  • Against a wall, tucked away in a corner on the floor or behind furniture
  • Near windows
  • Close to halogen or florescent lighting
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