In Cardiff there are 2 residential DSL providers covering 59.43% of the city. The average home can get speeds up to 24 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.
This page contains all DSL internet providers in Cardiff, AL.
To see availability maps for all providers including fiber, cable, DSL, and more in Cardiff, AL please click below.
DSL 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
Where in Cardiff is DSL internet available?
DSL Internet Availability Key
DSL is available in 59.43% of Cardiff. Areas in green have DSL internet service, where areas in yellow or red may not. The most widely available provider is AT&T. Call one of the companies with service in Cardiff above to see who has service at your home.
How fast is DSL internet in Cardiff?
The map below shows maximum DSL internet speeds by area in Cardiff.
DSL Internet Speed Key
The average Cardiff home can get up to 24 Mbps on their DSL internet plan. The fastest DSL download speed in the city is 25 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.
DSL internet speeds tend to be faster in the northeast parts of Cardiff, and slower in the central areas of the city.
Is DSL the fastest internet I can get in Cardiff?
The fastest internet for you may vary based on where in Cardiff you live. In general, fiber competes most often with DSL 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.
DSL 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.
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
Cardiff DSL 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 DSL internet in Cardiff compare to the rest of Alabama?
DSL internet speeds in Cardiff are much faster versus the average speeds in Alabama: 0.00 Mbps in Alabama versus 24 Mbps in the city. The state has similar DSL availability compared to the city. Average DSL coverage in Alabama is 0.00% versus 59.43% in Cardiff.
What zip codes have DSL internet?
DSL 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 DSL internet 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: more DSL coverage, faster speeds
- Brookside, AL: less DSL coverage, faster speeds
- Sayre, AL: less DSL coverage, faster speeds
- Graysville, AL: more DSL coverage, faster speeds
- Gardendale, AL: more DSL coverage, faster speeds
- Adamsville, AL: more DSL coverage, faster speeds
- Fultondale, AL: more DSL coverage, faster speeds
- Forestdale, AL: more DSL coverage, faster speeds
- Dora, AL: more DSL coverage, faster speeds
- Docena, AL: less DSL coverage, faster speeds
Cities with Similar Populations
- Walpole, IL: more DSL coverage, slower speeds
- Batesville, AL: less DSL coverage, slower speeds
- West Athens, ME: more DSL coverage, faster speeds
- Zephyr, NC: more DSL coverage, slower speeds
- Hatton, WA: less DSL coverage, faster speeds
- Blackford, KY: less DSL coverage, slower speeds
- Bosler, WY: more DSL coverage, faster speeds
- Nickleville, PA: more DSL coverage, faster speeds
- Parris Island, SC: more DSL coverage, faster speeds
- Lapile, AR: less DSL coverage, slower speeds