In Cardiff there are 7 residential internet providers covering 100.00% of the city. The average home can get speeds up to 3,189 Mbps. Note that we may have a financial relationship with some of the providers below. This does not influence rankings, and helps us provide high-quality detailed information for free.
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7 Internet Service Providers in Cardiff
Data updated 11/14/2025, based on FCC data from 12/31/2024. This is the most current data available as of .
To avoid wasting your time, providers with less than 1% coverage in Cardiff are not shown.
Cardiff Satellite TV & Internet Providers
DISH Satellite TV
DIRECTV Satellite TV
Not sure whether to choose Dish or DIRECTV? For most people most of the time we recommend DISH. But click here to learn more.
Viasat Satellite Internet
Availability maps for all providers in Cardiff
Using the dropdown below, please select a provider. Green indicates nearly all homes have service, red indicates few homes have service, and blank indicates no service.
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Internet service is available in 100.00% of Cardiff. Using our interactive availability map, you can compare service areas for different providers, we include fiber, cable, DSL, or fixed wireless internet service for all providers who offer it. You will notice that some providers might be listed multiple times for each service. If you find no providers cover the location you're looking at, you can opt for satellite service. The most widely available provider is AT&T. Now you can call companies in Cardiff with more confidence that they might be available.
How fast are internet speeds in Cardiff?
The map below shows maximum internet speeds by area in Cardiff.
Internet Speed Key
The average Cardiff home can get up to 3,189 Mbps on their internet plan. For most people, the fastest download speed in the city is 5,000 Mbps, which 55.66% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 3.77% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Cardiff.
Internet speeds tend to be faster in the northeast parts of Cardiff, and slower in the central areas of the city.
What type of internet should I choose in Cardiff?
The fastest internet for you may vary based on where in Cardiff you live. If speed is your main concern, fiber will be the fastest internet in the city.
- Fiber is the fastest internet type for 55.66% of Cardiff homes.
- Cable is fastest for 40.57% of the city.
- DSL is fastest for 3.77%.
- Fixed wireless is fastest for less than 1%.
- Satellite internet may be the only option for less than 1% of Cardiff homes.
Internet Market Health in Cardiff
Internet Competition Key
The map shows how competitive the Cardiff internet service market is. Areas in green have more alternatives, areas in yellow have a few choices, and areas in red may have only one provider. More competition usually means faster speeds and better prices for you, the customer.
Below are quick facts on internet competition and market health in Cardiff based on what connections the average home has availabile:
- Average number of internet service providers to a home: 6.2 (very healthy)
- Average types of service (fiber, cable, DSL, etc): 3.0 (very healthy)
- Average providers with broadband (25 Mbps+) speeds: 6.2 (very healthy)
Overall, competition is very healthy.
Cardiff internet customers have the ability to buy internet service from 1 to 9 different providers, depending on where they live. For different types of service, Cardiff homes have between 1 and 4 options. The type(s) of service available are cable, fixed wireless, dsl, and fiber, though these may vary depending on the region within the city.
When it comes to broadband download speeds faster than 25 Mbps, the situation is worse. Cardiff internet customers who want faster speeds have between 0 and 9 choices of companies offering speeds up to or over 25 Mbps.
More internet companies with faster speeds means fewer monopolies and better prices for customers. In promoting a free market for internet, Cardiff is doing quite well.
TV & Internet Providers in Depth
Below you'll find which TV and internet providers offer service in Cardiff, along with details on where in Cardiff and at what speeds.
Spectrum Cable in Cardiff, AL
Spectrum cable coverage
About 96.23%, or 204 people, have Spectrum cable internet available to them in the city. The company covers the entire Cardiff area. Spectrum is one of the largest internet service providers internet service providers in the US, with internet service available in most of Cardiff.
Spectrum cable download speeds
Spectrum is below average when comparing download speeds to all other internet providers in Cardiff. Versus other cable providers in the area, Spectrum cable is the fastest. There are no different maximum speeds throughout Cardiff. The fastest plan anyone in Cardiff can order from Spectrum goes up to 1,000 Mbps, and all Cardiff customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Spectrum cable upload speeds
In Cardiff download speeds tend to be faster than than upload speeds for Spectrum cable. Compared to other ISPs, Spectrum is below average where upload speeds are concerned, and the fastest compared to other Cardiff cable providers. Spectrum offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Cardiff is up to 35 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 35.0 Mbps
EarthLink DSL in Cardiff, AL
EarthLink DSL coverage
About 59.43%, or 126 people, have EarthLink DSL internet available to them in the city. The company covers the northeast and central Cardiff area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of Cardiff.
EarthLink DSL download speeds
EarthLink is one of the slowest when comparing download speeds to all other internet providers in Cardiff. Versus other DSL providers in the area, EarthLink DSL is one of the fastest. There are 2 different maximum speeds throughout Cardiff. The fastest plan anyone in Cardiff can order from EarthLink goes up to 25 Mbps, the slowest package only goes up to 10 Mbps, and the city-wide average maximum speed for Cardiff customers is up to 24 Mbps.
Show all download speeds
- 93.7% up to 25.0 Mbps
- 6.3% up to 10.0 Mbps
EarthLink DSL upload speeds
In Cardiff download speeds tend to be faster than than upload speeds for EarthLink DSL. Compared to other ISPs, EarthLink is below average where upload speeds are concerned, and one of the fastest compared to other Cardiff DSL providers. EarthLink offers 2 different upload speeds across the city, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Cardiff is up to 5.0 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, EarthLink customers can get speeds up to 4.7 Mbps.
Show all upload speeds
- 93.7% up to 5.0 Mbps
- 6.3% up to 1.0 Mbps
AT&T DSL in Cardiff, AL
AT&T DSL coverage
About 59.43%, or 126 people, have AT&T DSL internet available to them in the city. The company covers the northeast and central Cardiff area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of Cardiff.
AT&T DSL download speeds
AT&T is one of the slowest when comparing download speeds to all other internet providers in Cardiff. Versus other DSL providers in the area, AT&T DSL is one of the fastest. There are 2 different maximum speeds throughout Cardiff. The fastest plan anyone in Cardiff can order from AT&T goes up to 25 Mbps, the slowest package only goes up to 10 Mbps, and the city-wide average maximum speed for Cardiff customers is up to 24 Mbps.
Show all download speeds
- 93.7% up to 25.0 Mbps
- 6.3% up to 10.0 Mbps
AT&T DSL upload speeds
In Cardiff download speeds tend to be faster than than upload speeds for AT&T DSL. Compared to other ISPs, AT&T is below average where upload speeds are concerned, and one of the fastest compared to other Cardiff DSL providers. AT&T offers 2 different upload speeds across the city, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Cardiff is up to 5.0 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, AT&T customers can get speeds up to 4.7 Mbps.
Show all upload speeds
- 93.7% up to 5.0 Mbps
- 6.3% up to 1.0 Mbps
EarthLink Fiber in Cardiff, AL
EarthLink fiber coverage
About 55.66%, or 118 people, have EarthLink fiber internet available to them in the city. The company covers the northeast Cardiff area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of Cardiff.
EarthLink fiber download speeds
EarthLink is one of the fastest when comparing download speeds to all other internet providers in Cardiff. Versus other fiber providers in the area, EarthLink fiber is one of the fastest. There are no different maximum speeds throughout Cardiff. The fastest plan anyone in Cardiff can order from EarthLink goes up to 5,000 Mbps, and all Cardiff customers can get this speed.
Show all download speeds
- 100.0% up to 5,000.0 Mbps
EarthLink fiber upload speeds
In Cardiff download speeds tend to be equal to than upload speeds for EarthLink fiber. Compared to other ISPs, EarthLink is one of the fastest where upload speeds are concerned, and one of the fastest compared to other Cardiff fiber providers. EarthLink offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Cardiff is up to 5,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 5,000.0 Mbps
AT&T Fiber in Cardiff, AL
AT&T fiber coverage
About 55.66%, or 118 people, have AT&T fiber internet available to them in the city. The company covers the northeast Cardiff area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of Cardiff.
AT&T fiber download speeds
AT&T is one of the fastest when comparing download speeds to all other internet providers in Cardiff. Versus other fiber providers in the area, AT&T fiber is one of the fastest. There are no different maximum speeds throughout Cardiff. The fastest plan anyone in Cardiff can order from AT&T goes up to 5,000 Mbps, and all Cardiff customers can get this speed.
Show all download speeds
- 100.0% up to 5,000.0 Mbps
AT&T fiber upload speeds
In Cardiff download speeds tend to be equal to than upload speeds for AT&T fiber. Compared to other ISPs, AT&T is one of the fastest where upload speeds are concerned, and one of the fastest compared to other Cardiff fiber providers. AT&T offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Cardiff is up to 5,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 5,000.0 Mbps
T-Mobile Home Internet Fixed Wireless in Cardiff, AL
T-Mobile Home Internet fixed wireless coverage
About 89.62%, or 190 people, have T-Mobile Home Internet fixed wireless internet available to them in the city. The company covers the entire Cardiff area. T-Mobile Home Internet is one of the largest internet service providers internet service providers in the US, with internet service available in most of Cardiff.
T-Mobile Home Internet fixed wireless download speeds
T-Mobile Home Internet is below average when comparing download speeds to all other internet providers in Cardiff. Versus other fixed wireless providers in the area, T-Mobile Home Internet fixed wireless is one of the slowest. There are no different maximum speeds throughout Cardiff. The fastest plan anyone in Cardiff can order from T-Mobile Home Internet goes up to 25 Mbps, and all Cardiff customers can get this speed.
Show all download speeds
- 100.0% up to 25.0 Mbps
T-Mobile Home Internet fixed wireless upload speeds
In Cardiff download speeds tend to be faster than than upload speeds for T-Mobile Home Internet fixed wireless. Compared to other ISPs, T-Mobile Home Internet is one of the slowest where upload speeds are concerned, and one of the slowest compared to other Cardiff fixed wireless providers. T-Mobile Home Internet offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Cardiff is up to 3.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 3.0 Mbps
EarthLink Fixed Wireless in Cardiff, AL
EarthLink fixed wireless coverage
About 75.47%, or 160 people, have EarthLink fixed wireless internet available to them in the city. The company covers the northeast Cardiff area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in much of Cardiff.
EarthLink fixed wireless download speeds
EarthLink is below average when comparing download speeds to all other internet providers in Cardiff. Versus other fixed wireless providers in the area, EarthLink fixed wireless is one of the slowest. There are no different maximum speeds throughout Cardiff. The fastest plan anyone in Cardiff can order from EarthLink goes up to 25 Mbps, and all Cardiff customers can get this speed.
Show all download speeds
- 100.0% up to 25.0 Mbps
EarthLink fixed wireless upload speeds
In Cardiff download speeds tend to be faster than than upload speeds for EarthLink fixed wireless. Compared to other ISPs, EarthLink is one of the slowest where upload speeds are concerned, and one of the slowest compared to other Cardiff fixed wireless providers. EarthLink offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Cardiff is up to 3.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 3.0 Mbps
AT&T Fixed Wireless in Cardiff, AL
AT&T fixed wireless coverage
About 75.47%, or 160 people, have AT&T fixed wireless internet available to them in the city. The company covers the northeast Cardiff area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in much of Cardiff.
AT&T fixed wireless download speeds
AT&T is below average when comparing download speeds to all other internet providers in Cardiff. Versus other fixed wireless providers in the area, AT&T fixed wireless is one of the slowest. There are no different maximum speeds throughout Cardiff. The fastest plan anyone in Cardiff can order from AT&T goes up to 25 Mbps, and all Cardiff customers can get this speed.
Show all download speeds
- 100.0% up to 25.0 Mbps
AT&T fixed wireless upload speeds
In Cardiff download speeds tend to be faster than than upload speeds for AT&T fixed wireless. Compared to other ISPs, AT&T is one of the slowest where upload speeds are concerned, and one of the slowest compared to other Cardiff fixed wireless providers. AT&T offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Cardiff is up to 3.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 3.0 Mbps
Verizon Fixed Wireless in Cardiff, AL
Verizon fixed wireless coverage
About 55.66%, or 118 people, have Verizon fixed wireless internet available to them in the city. The company covers the northeast Cardiff area. Verizon is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of Cardiff.
Verizon fixed wireless download speeds
Verizon is below average when comparing download speeds to all other internet providers in Cardiff. Versus other fixed wireless providers in the area, Verizon fixed wireless is the fastest. There are no different maximum speeds throughout Cardiff. The fastest plan anyone in Cardiff can order from Verizon goes up to 300 Mbps, and all Cardiff customers can get this speed.
Show all download speeds
- 100.0% up to 300.0 Mbps
Verizon fixed wireless upload speeds
In Cardiff download speeds tend to be faster than than upload speeds for Verizon fixed wireless. Compared to other ISPs, Verizon is below average where upload speeds are concerned, and the fastest compared to other Cardiff fixed wireless providers. Verizon offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Cardiff is up to 20 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 20.0 Mbps
Cardiff Internet by Area
This information is most helpful to those looking for homes or considering moving to Cardiff or any of the areas nearby.
How does internet in Cardiff compare to the rest of Alabama?
Internet speeds in Cardiff are comparable versus the average speeds in Alabama: 3,158 Mbps in Alabama versus 3,189 Mbps in the city. The state has similar internet availability compared to the city. Average internet coverage in Alabama is 98.05% versus 100.00% in Cardiff.
What zip codes have widespread internet?
Internet coverage varies by zip code and neighborhood. Some examples in or around Cardiff are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does internet service look like in other cities?
Below are cities nearby and with similar populations. This comparison can be useful if living somewhere with fast internet is important to you.
Nearby Cities
- Mount Olive, AL: less internet coverage, faster speeds
- Brookside, AL: less internet coverage, slower speeds
- Sayre, AL: less internet coverage, slower speeds
- Graysville, AL: less internet coverage, slower speeds
- Gardendale, AL: less internet coverage, faster speeds
- Adamsville, AL: less internet coverage, slower speeds
- Fultondale, AL: less internet coverage, faster speeds
- Forestdale, AL: less internet coverage, faster speeds
- Dora, AL: less internet coverage, slower speeds
- Docena, AL: equal internet coverage, slower speeds
Cities with Similar Populations
- Walpole, IL: equal internet coverage, slower speeds
- Barton, ND: less internet coverage, faster speeds
- Batesville, AL: less internet coverage, slower speeds
- Lucerne, MO: less internet coverage, slower speeds
- West Athens, ME: equal internet coverage, faster speeds
- Macksville, WV: less internet coverage, slower speeds
- Manheim Center, NY: equal internet coverage, slower speeds
- Zephyr, NC: equal internet coverage, slower speeds
- Hatton, WA: less internet coverage, slower speeds
- Blackford, KY: less internet coverage, slower speeds