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Cox Internet Speed Test

Check the speed of your device's connection to the Internet and explore steps you can take to improve performance. For the speed test to provide the most accurate results, use a computer with a Wired (Ethernet) connection, turn off WiFi, and close all other programs on your computer. Get more tips ›

We're Sorry! The Speed Test is Down for Maintenance.

While the test is temporarily unavailable, you can still test your Internet speed in My Account.

7 Tips to Improve Your Internet Speed

Many factors inside of your home can affect your speed. Follow these tips to enhance your speed:

1. Reboot Equipment

Reboot your modem (watch how-to video) and devices by powering them off and back on for optimal performance.

3. Turn Off WiFi

Turn off WiFi on your computer and unplug your router (if you have one) from your modem. Disconnect from any VPN's.

5. Check Your Equipment

Make sure your modem is DOCSIS 3.0 or higher (DOCSIS 3.1 for Gigablast)—older modems can't process high speeds.

View Cox Certified Modems ›

Time to upgrade? Explore Panoramic WiFi ›

7. Update Your Software

Make sure you have the latest updates installed for your computer’s Operating System and Internet browser (be sure to remove unused plugins/extensions).

2. Connect via Ethernet Cable

Connect your computer directly to your modem with an Ethernet cable (CAT5e or CAT6).

Step-by-Step Instructions ›

4. Close Other Programs

Close all other programs, applications, and browser tabs on your computer to eliminate network congestion.

6. Check Device Limits

Check the owner’s manual for your device to find out if it's capable of processing high speeds. Even many recently-purchased computers and laptops are not capable of broadband speeds.

See tips for improving WiFi speeds

There are steps you can take to improve your WiFi experience, but keep in mind that Wired (Ethernet) connections are faster and will provide more accurate speed test results.

Disconnect Other Devices

Disconnect other devices and close all other programs, applications, and browser tabs (except the tab with the Speed Test) on your device to eliminate network congestion.

Stand in Different Places

Test your speed in different places around your home. Distance from the router and interfering objects can affect speeds.

Check Your Router

Make sure your router operates on the 802.11ac standard.

View Cox Certified Modems ›

Time to upgrade? Explore Panoramic WiFi ›

Add WiFi Extenders

WiFi Extenders can stretch your network to eliminate dead zones. Extenders are available with Panoramic WiFi from Cox.

Explore Panoramic WiFi ›

Move Your Router

Place your router in a central, elevated, open location away from walls, metal objects, and objects that transmit radio waves like cordless phones, microwaves, & Bluetooth devices.

Connect to 5GHz Network

If you have a dual-band router, connect to the 5 GHz network unless you are far away from the router or your device isn’t compatible.

Password Protect

Protect your network with a strong password to prevent others from using your WiFi. Use a combination of upper and lower case letters, numbers and special characters.

For more help improving your WiFi, check out the Ways to Improve Your In-Home WiFi Network article in Cox Support.

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What You Can Do with Your Cox Internet Plan

Make sure you have the speed you need to keep up with your online activities.

Online Activity Gigablast
9+ devices
Ultimate 300
7-9 devices
Preferred 100
5-7 devices
Essential 30
3-5 devices
Starter 10
1-2 devices
Light Web Surfing
Sending/Receiving Email
Music Streaming
Light Video Streaming and Gaming
Managing Large Files
Multiple HD Video Streaming and Gaming
4K Video Streaming and 4K Gaming
HD Video Calling

Gigablast is available in select Cox markets. Don't see your plan? View grandfathered Cox Internet plans ›

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

Upgrade Internet Upgrade Internet

Wall-to-Wall Fast with Panoramic WiFi

Eliminate dead zones with fast WiFi coverage in every part of your home and get total WiFi control with the My WiFi tool. Available on all Cox Internet plans when you add the Panoramic WiFi modem.

Additional Information

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, by signing in first, you can evaluate the speed test results against your Internet plan. If you attempt to run the test outside of a Cox network (in-home or WiFi) such as using your mobile carrier data, 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 smartphone, tablet or other mobile device?

Absolutely! We have designed the speed test 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 due to the factors listed above.

Does Cox guarantee my Internet speed test results 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, and the performance of the websites you visit and congestion on the Internet.

How does the Cox Speed Test tool work?

The Cox Speed Test 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, we test your bandwidth in several passes.

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

Why are my Cox Speed Test results different than results from other online Speed Tests?

Test methodologies differ between speed test websites, which can cause your results to be different even if the conditions under which you're performing the test are the same. Here are some factors that can differ:

  1. The location of the server being tested
  2. The number of threads being used
  3. How results are measured from analyzing test samples

So what do all of the terms, like "latency," mean? (Glossary)

Wired Connection – using an ethernet cable connected from your device directly to the modem to connect to the Internet and other devices

WiFi Connection – a wireless network that uses a radio frequency signal to connect your devices to the Internet and to each other

Cellular Connection – a network distributed by mobile carriers (AT&T, Verizon, Sprint, T-Mobile, etc.) over land through cells that together provide radio coverage over larger geographical areas

Download – how fast your connection delivers content from the Internet to your device. It determines how long it takes to download files (like photos, movies, songs) or display webpages with lots of images.

Upload – how fast content is delivered from your device to the Internet. It determines how long it takes to post pictures to social media or upload an email attachement.

Mbps – Megabits per second (Mbps) is is the industry-standard measure of transfer rate or Internet speed.

Latency – The reaction time (measured in milliseconds) of your connection–how quickly your device gets a response after you’ve sent out a request

Test Server – a computer system used as the central repository of data and various programs that are shared by users in a network

IP Address – a unique string of numbers separated by periods that identifies each computer using the Internet Protocol to communicate over a network

Modem – a small device that connects to your Internet Service Provider (ISP) to provide Internet in your home

Router – a small device that connects to your modem via an Ethernet cable and passes the Internet connection on to other devices either via additional Ethernet cables or via a wireless network

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