In Castle Hill there are 2 residential Fiber providers covering 23.68% of the city. The average home can get speeds up to 5,000 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 Fiber internet providers in Castle Hill, CA.
To see availability maps for all providers including fiber, cable, DSL, and more in Castle Hill, CA please click below.
Castle Hill, CA Availability Maps
Fiber Internet Service Providers in Castle Hill
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 Castle Hill are not shown.
Castle Hill 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 Castle Hill is fiber internet available?
Fiber Internet Availability Key
Fiber is available in 23.68% of Castle Hill. Areas in green have fiber 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 Castle Hill above to see who has service at your home.
How fast is fiber internet in Castle Hill?
The map below shows maximum fiber internet speeds by area in Castle Hill.
Fiber Internet Speed Key
The average Castle Hill home can get up to 5,000 Mbps on their fiber internet plan. The fastest fiber download speed in the city is 5,000 Mbps, which 23.68% of residents can get.
Is fiber the fastest internet I can get in Castle Hill?
The fastest internet for you may vary based on where in Castle Hill you live. In general, cable competes most often with fiber in the city.
- Fiber is the fastest internet type for 23.68% of Castle Hill homes.
- Cable is fastest for 76.32% 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 Castle Hill homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in Castle Hill, along with details on where in Castle Hill and at what speeds.
EarthLink Fiber in Castle Hill, CA
EarthLink fiber coverage
About 23.68%, or 36 people, have EarthLink fiber internet available to them in the city. The company covers the entire Castle Hill area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in a small portion of Castle Hill.
EarthLink fiber download speeds
EarthLink is one of the fastest when comparing download speeds to all other internet providers in Castle Hill. Versus other fiber providers in the area, EarthLink fiber is one of the fastest. There are no different maximum speeds throughout Castle Hill. The fastest plan anyone in Castle Hill can order from EarthLink goes up to 5,000 Mbps, and all Castle Hill customers can get this speed.
Show all download speeds
- 100.0% up to 5,000.0 Mbps
EarthLink fiber upload speeds
In Castle Hill 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 Castle Hill fiber providers. EarthLink offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Castle Hill 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 Castle Hill, CA
AT&T fiber coverage
About 23.68%, or 36 people, have AT&T fiber internet available to them in the city. The company covers the entire Castle Hill area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in a small portion of Castle Hill.
AT&T fiber download speeds
AT&T is one of the fastest when comparing download speeds to all other internet providers in Castle Hill. Versus other fiber providers in the area, AT&T fiber is one of the fastest. There are no different maximum speeds throughout Castle Hill. The fastest plan anyone in Castle Hill can order from AT&T goes up to 5,000 Mbps, and all Castle Hill customers can get this speed.
Show all download speeds
- 100.0% up to 5,000.0 Mbps
AT&T fiber upload speeds
In Castle Hill 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 Castle Hill fiber providers. AT&T offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Castle Hill is up to 5,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 5,000.0 Mbps
Castle Hill Fiber by Area
This information is most helpful to those looking for homes or considering moving to Castle Hill or any of the areas nearby.
How does fiber internet in Castle Hill compare to the rest of California?
Fiber internet speeds in Castle Hill are much faster versus the average speeds in California: 0.00 Mbps in California versus 5,000 Mbps in the city. The state has similar fiber availability compared to the city. Average fiber coverage in California is 0.00% versus 23.68% in Castle Hill.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around Castle Hill are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does fiber 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 Creek, CA: more fiber coverage, faster speeds
- Alamo, CA: more fiber coverage, slower speeds
- Lafayette, CA: more fiber coverage, slower speeds
- Moraga, CA: less fiber coverage, slower speeds
- Pleasant Hill, CA: more fiber coverage, slower speeds
- Concord, CA: more fiber coverage, faster speeds
- Orinda, CA: more fiber coverage, slower speeds
- Canyon, CA: more fiber coverage, similar speeds
- Danville, CA: more fiber coverage, slower speeds
- Clayton, CA: less fiber coverage, similar speeds
Cities with Similar Populations
- Kenna, NM: less fiber coverage, slower speeds
- Keota, CO: more fiber coverage, slower speeds
- Saude, IA: more fiber coverage, slower speeds
- Kimery, TN: more fiber coverage, slower speeds
- Saronville, NE: less fiber coverage, slower speeds
- Sargent, TX: more fiber coverage, slower speeds
- Sapelo Island, GA: more fiber coverage, faster speeds
- Sanger, ND: more fiber coverage, slower speeds
- Sagerton, TX: more fiber coverage, slower speeds
- Ruraldale, OH: more fiber coverage, slower speeds