In Diamond Bar there is 1 residential DSL provider covering 27.17% of the city. The average home can get speeds up to 11 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 Diamond Bar, CA.
To see availability maps for all providers including fiber, cable, DSL, and more in Diamond Bar, CA please click below.
Diamond Bar, CA Availability Maps
DSL Internet Service Provider in Diamond Bar
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 Diamond Bar are not shown.
Diamond Bar 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 Diamond Bar is DSL internet available?
DSL Internet Availability Key
DSL is available in 27.17% of Diamond Bar. Areas in green have DSL internet service, where areas in yellow or red may not. The most widely available provider is Frontier. Call one of the companies with service in Diamond Bar above to see who has service at your home.
How fast is DSL internet in Diamond Bar?
The map below shows maximum DSL internet speeds by area in Diamond Bar.
DSL Internet Speed Key
The average Diamond Bar home can get up to 11 Mbps on their DSL internet plan. The fastest DSL download speed in the city is 70 Mbps, which less than 1% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 26.63% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Diamond Bar.
DSL internet speeds tend to be faster in the central parts of Diamond Bar, and slower in the south areas of the city.
Is DSL the fastest internet I can get in Diamond Bar?
The fastest internet for you may vary based on where in Diamond Bar you live. In general, fiber competes most often with DSL in the city.
- Fiber is the fastest internet type for 51.81% of Diamond Bar homes.
- Cable is fastest for 48.11% 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 Diamond Bar homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Diamond Bar, along with details on where in Diamond Bar and at what speeds.
Frontier Communications DSL in Diamond Bar, CA
Frontier DSL coverage
About 27.17%, or 14,864 people, have Frontier DSL internet available to them in the city. The company covers the central, south, east, northeast, southeast, north, and west Diamond Bar area. Frontier is one of the largest internet service providers internet service providers in the US, with internet service available in a small portion of Diamond Bar.
Frontier Communications DSL download speeds
Frontier is the slowest when comparing download speeds to all other internet providers in Diamond Bar. Versus other DSL providers in the area, Frontier DSL is the fastest. There are 2 different maximum speeds throughout Diamond Bar. The fastest plan anyone in Diamond Bar can order from Frontier goes up to 70 Mbps, the slowest package only goes up to 10 Mbps, and the city-wide average maximum speed for Diamond Bar customers is up to 11 Mbps.
Show all download speeds
- 2.0% up to 70.0 Mbps
- 98.0% up to 10.0 Mbps
Frontier Communications DSL upload speeds
In Diamond Bar download speeds tend to be faster than than upload speeds for Frontier DSL. Compared to other ISPs, Frontier is the slowest where upload speeds are concerned, and the fastest compared to other Diamond Bar DSL providers. Frontier 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 Diamond Bar is up to 3.0 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, Frontier customers can get speeds up to 1.0 Mbps.
Show all upload speeds
- 2.0% up to 3.0 Mbps
- 98.0% up to 1.0 Mbps
Diamond Bar DSL by Area
This information is most helpful to those looking for homes or considering moving to Diamond Bar or any of the areas nearby.
How does DSL internet in Diamond Bar compare to the rest of California?
DSL internet speeds in Diamond Bar are much faster versus the average speeds in California: 0.00 Mbps in California versus 11 Mbps in the city. The state has similar DSL availability compared to the city. Average DSL coverage in California is 0.00% versus 27.17% in Diamond Bar.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Diamond Bar 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
- Walnut, CA: less DSL coverage, slower speeds
- Rowland Heights, CA: less DSL coverage, slower speeds
- South San Jose Hills, CA: less DSL coverage, slower speeds
- Pomona, CA: less DSL coverage, faster speeds
- Chino Hills, CA: less DSL coverage, faster speeds
- Brea, CA: more DSL coverage, faster speeds
- West Covina, CA: less DSL coverage, slower speeds
- San Dimas, CA: less DSL coverage, faster speeds
- Valinda, CA: less DSL coverage, slower speeds
- Covina, CA: less DSL coverage, faster speeds
Cities with Similar Populations
- Chambersburg, PA: more DSL coverage, faster speeds
- Gallatin, TN: more DSL coverage, faster speeds
- Downers Grove, IL: more DSL coverage, faster speeds
- Delano, CA: more DSL coverage, faster speeds
- Covington, LA: more DSL coverage, faster speeds
- Ceres, CA: more DSL coverage, faster speeds
- West Sacramento, CA: more DSL coverage, faster speeds
- Westfield, IN: more DSL coverage, faster speeds
- West Chester, OH: more DSL coverage, faster speeds
- Lancaster, OH: more DSL coverage, faster speeds