In Costa Mesa there are 2 residential DSL providers covering 91.82% of the city. The average home can get speeds up to 88 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 Costa Mesa, CA.
To see availability maps for all providers including fiber, cable, DSL, and more in Costa Mesa, CA please click below.
Costa Mesa, CA Availability Maps
DSL Internet Service Providers in Costa Mesa
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 Costa Mesa are not shown.
Costa Mesa 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 Costa Mesa is DSL internet available?
DSL Internet Availability Key
DSL is available in 91.82% of Costa Mesa. 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 Costa Mesa above to see who has service at your home.
How fast is DSL internet in Costa Mesa?
The map below shows maximum DSL internet speeds by area in Costa Mesa.
DSL Internet Speed Key
The average Costa Mesa home can get up to 88 Mbps on their DSL internet plan. The fastest DSL download speed in the city is 100 Mbps, which 66.65% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 1.04% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Costa Mesa.
DSL internet speeds tend to be faster in the northeast parts of Costa Mesa, and slower in the southeast areas of the city.
Is DSL the fastest internet I can get in Costa Mesa?
The fastest internet for you may vary based on where in Costa Mesa you live. In general, fiber competes most often with DSL in the city.
- Fiber is the fastest internet type for 62.48% of Costa Mesa homes.
- Cable is fastest for 37.21% of the city.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for less than 1%.
- Satellite internet may be the only option for less than 1% of Costa Mesa homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Costa Mesa, along with details on where in Costa Mesa and at what speeds.
EarthLink DSL in Costa Mesa, CA
EarthLink DSL coverage
About 91.82%, or 104,290 people, have EarthLink DSL internet available to them in the city. The company covers the entire Costa Mesa area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in most of Costa Mesa.
EarthLink DSL download speeds
EarthLink is below average when comparing download speeds to all other internet providers in Costa Mesa. Versus other DSL providers in the area, EarthLink DSL is one of the fastest. There are 5 different maximum speeds throughout Costa Mesa. The fastest plan anyone in Costa Mesa can order from EarthLink goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the city-wide average maximum speed for Costa Mesa customers is up to 88 Mbps.
Show all download speeds
- 72.6% up to 100.0 Mbps
- 11.5% up to 75.0 Mbps
- 12.3% up to 50.0 Mbps
- 2.5% up to 25.0 Mbps
- 1.1% up to 10.0 Mbps
EarthLink DSL upload speeds
In Costa Mesa 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 Costa Mesa DSL providers. EarthLink offers 4 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 Costa Mesa is up to 20 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, EarthLink customers can get speeds up to 18 Mbps.
Show all upload speeds
- 84.1% up to 20.0 Mbps
- 12.3% up to 10.0 Mbps
- 2.5% up to 5.0 Mbps
- 1.1% up to 1.0 Mbps
AT&T DSL in Costa Mesa, CA
AT&T DSL coverage
About 91.82%, or 104,290 people, have AT&T DSL internet available to them in the city. The company covers the entire Costa Mesa area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in most of Costa Mesa.
AT&T DSL download speeds
AT&T is below average when comparing download speeds to all other internet providers in Costa Mesa. Versus other DSL providers in the area, AT&T DSL is one of the fastest. There are 5 different maximum speeds throughout Costa Mesa. The fastest plan anyone in Costa Mesa can order from AT&T goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the city-wide average maximum speed for Costa Mesa customers is up to 88 Mbps.
Show all download speeds
- 72.6% up to 100.0 Mbps
- 11.5% up to 75.0 Mbps
- 12.3% up to 50.0 Mbps
- 2.5% up to 25.0 Mbps
- 1.1% up to 10.0 Mbps
AT&T DSL upload speeds
In Costa Mesa 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 Costa Mesa DSL providers. AT&T offers 4 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 Costa Mesa is up to 20 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 18 Mbps.
Show all upload speeds
- 84.1% up to 20.0 Mbps
- 12.3% up to 10.0 Mbps
- 2.5% up to 5.0 Mbps
- 1.1% up to 1.0 Mbps
Costa Mesa DSL by Area
This information is most helpful to those looking for homes or considering moving to Costa Mesa or any of the areas nearby.
How does DSL internet in Costa Mesa compare to the rest of California?
DSL internet speeds in Costa Mesa are much faster versus the average speeds in California: 0.00 Mbps in California versus 88 Mbps in the city. The state has similar DSL availability compared to the city. Average DSL coverage in California is 0.00% versus 91.82% in Costa Mesa.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Costa Mesa 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
- Newport Beach, CA: less DSL coverage, slower speeds
- Fountain Valley, CA: less DSL coverage, slower speeds
- Corona Del Mar, CA: less DSL coverage, slower speeds
- Huntington Beach, CA: less DSL coverage, slower speeds
- Santa Ana, CA: less DSL coverage, slower speeds
- Newport Coast, CA: less DSL coverage, slower speeds
- Midway City, CA: less DSL coverage, slower speeds
- Irvine, CA: less DSL coverage, slower speeds
- Tustin, CA: less DSL coverage, slower speeds
- Westminster, CA: less DSL coverage, slower speeds
Cities with Similar Populations
- Clinton Township, MI: more DSL coverage, slower speeds
- College Station, TX: less DSL coverage, slower speeds
- Columbia, MO: less DSL coverage, slower speeds
- Corpus Christi, TX: less DSL coverage, slower speeds
- Compton, CA: more DSL coverage, slower speeds
- Clearwater, FL: less DSL coverage, slower speeds
- Camarillo, CA: less DSL coverage, slower speeds
- Chino Hills, CA: less DSL coverage, slower speeds
- Canton, OH: less DSL coverage, slower speeds
- Champaign, IL: less DSL coverage, faster speeds