In Castro-Upper Market there are 3 residential Fiber providers covering 61.93% of the neighborhood. The average home can get speeds up to 3,135 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 Castro-Upper Market, San Francisco, CA.
To see availability maps for all providers including fiber, cable, DSL, and more in Castro-Upper Market, San Francisco, CA please click below.
Castro-Upper Market, San Francisco, CA Availability Maps
Fiber Internet Service Providers in Castro-Upper Market
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 Castro-Upper Market are not shown.
Castro-Upper Market 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 Castro-Upper Market is fiber internet available?
Fiber Internet Availability Key
Fiber is available in 61.93% of Castro-Upper Market. 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 Castro-Upper Market above to see who has service at your home.
How fast is fiber internet in Castro-Upper Market?
The map below shows maximum fiber internet speeds by area in Castro-Upper Market.
Fiber Internet Speed Key
The average Castro-Upper Market home can get up to 3,135 Mbps on their fiber internet plan. The fastest fiber download speed in the neighborhood is 5,000 Mbps, which 33.06% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 28.88% of homes can only purchase plans up to 1,000 Mbps. See the internet provider details below for info about their speed and coverage in Castro-Upper Market.
Fiber internet speeds tend to be faster in the northwest parts of Castro-Upper Market, and slower in the southeast areas of the neighborhood.
Is fiber the fastest internet I can get in Castro-Upper Market?
The fastest internet for you may vary based on where in Castro-Upper Market you live. In general, cable competes most often with fiber in the neighborhood.
- Fiber is the fastest internet type for 33.06% of Castro-Upper Market homes.
- Cable is fastest for 66.94% of the neighborhood.
- 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 Castro-Upper Market homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in Castro-Upper Market, along with details on where in Castro-Upper Market and at what speeds.
Sonic Fiber in Castro-Upper Market, San Francisco, CA
Sonic fiber coverage
About 45.36%, or 6,535 people, have Sonic fiber internet available to them in the neighborhood. The company covers the south, central, north, southeast, northeast, southwest, east, and west Castro-Upper Market area. Sonic is a large internet service provider internet service providers in the US, with internet service available in some of Castro-Upper Market.
Sonic fiber download speeds
Sonic is below average when comparing download speeds to all other internet providers in Castro-Upper Market. Versus other fiber providers in the area, Sonic fiber is the slowest. There are no different maximum speeds throughout Castro-Upper Market. The fastest plan anyone in Castro-Upper Market can order from Sonic goes up to 1,000 Mbps, and all Castro-Upper Market customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Sonic fiber upload speeds
In Castro-Upper Market download speeds tend to be equal to than upload speeds for Sonic fiber. Compared to other ISPs, Sonic is above average where upload speeds are concerned, and the slowest compared to other Castro-Upper Market fiber providers. Sonic offers no different upload speeds across the neighborhood. The fastest upload speed available to anyone from this ISP in Castro-Upper Market is up to 1,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1,000.0 Mbps
EarthLink Fiber in Castro-Upper Market, San Francisco, CA
EarthLink fiber coverage
About 41.79%, or 6,020 people, have EarthLink fiber internet available to them in the neighborhood. The company covers the west, north, south, central, northeast, northwest, east, and southeast Castro-Upper Market area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in some of Castro-Upper Market.
EarthLink fiber download speeds
EarthLink is one of the fastest when comparing download speeds to all other internet providers in Castro-Upper Market. Versus other fiber providers in the area, EarthLink fiber is one of the fastest. There are 2 different maximum speeds throughout Castro-Upper Market. The fastest plan anyone in Castro-Upper Market can order from EarthLink goes up to 5,000 Mbps, the slowest package only goes up to 1,000 Mbps, and the neighborhood-wide average maximum speed for Castro-Upper Market customers is up to 4,164 Mbps.
Show all download speeds
- 79.1% up to 5,000.0 Mbps
- 20.9% up to 1,000.0 Mbps
EarthLink fiber upload speeds
In Castro-Upper Market 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 Castro-Upper Market fiber providers. EarthLink offers 2 different upload speeds across the neighborhood, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Castro-Upper Market is up to 5,000 Mbps. Some customers have slower plan choices, which only go up to 1,000 Mbps. On average, EarthLink customers can get speeds up to 4,164 Mbps.
Show all upload speeds
- 79.1% up to 5,000.0 Mbps
- 20.9% up to 1,000.0 Mbps
AT&T Fiber in Castro-Upper Market, San Francisco, CA
AT&T fiber coverage
About 41.79%, or 6,020 people, have AT&T fiber internet available to them in the neighborhood. The company covers the west, north, south, central, northeast, northwest, east, and southeast Castro-Upper Market area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in some of Castro-Upper Market.
AT&T fiber download speeds
AT&T is one of the fastest when comparing download speeds to all other internet providers in Castro-Upper Market. Versus other fiber providers in the area, AT&T fiber is one of the fastest. There are 2 different maximum speeds throughout Castro-Upper Market. The fastest plan anyone in Castro-Upper Market can order from AT&T goes up to 5,000 Mbps, the slowest package only goes up to 1,000 Mbps, and the neighborhood-wide average maximum speed for Castro-Upper Market customers is up to 4,164 Mbps.
Show all download speeds
- 79.1% up to 5,000.0 Mbps
- 20.9% up to 1,000.0 Mbps
AT&T fiber upload speeds
In Castro-Upper Market 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 Castro-Upper Market fiber providers. AT&T offers 2 different upload speeds across the neighborhood, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Castro-Upper Market is up to 5,000 Mbps. Some customers have slower plan choices, which only go up to 1,000 Mbps. On average, AT&T customers can get speeds up to 4,164 Mbps.
Show all upload speeds
- 79.1% up to 5,000.0 Mbps
- 20.9% up to 1,000.0 Mbps
Castro-Upper Market Fiber by Area
This information is most helpful to those looking for homes or considering moving to Castro-Upper Market or any of the areas nearby.
How does fiber internet in Castro-Upper Market compare to the rest of San Francisco?
Fiber internet speeds in Castro-Upper Market are much faster versus the average speeds in San Francisco: 0.00 Mbps in San Francisco versus 3,135 Mbps in the neighborhood. The city has similar fiber availability compared to the neighborhood. Average fiber coverage in San Francisco is 0.00% versus 61.93% in Castro-Upper Market.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around Castro-Upper Market 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 neighborhoods?
Below are neighborhoods nearby and with similar populations. This comparison can be useful if living somewhere with fast internet is important to you.
Nearby Neighborhoods
- Duboce Triangle, San Francisco, CA: less fiber coverage, faster speeds
- Liberty Street Historic District, San Francisco, CA: more fiber coverage, slower speeds
- Noe Valley, San Francisco, CA: more fiber coverage, faster speeds
- Cole Valley, San Francisco, CA: less fiber coverage, slower speeds
- Haight-Ashbury, San Francisco, CA: less fiber coverage, faster speeds
- Twin Peaks, San Francisco, CA: less fiber coverage, faster speeds
- Diamond Heights, San Francisco, CA: less fiber coverage, faster speeds
- Mission, San Francisco, CA: more fiber coverage, slower speeds
- Western Addition, San Francisco, CA: less fiber coverage, faster speeds
- Glen Park, San Francisco, CA: more fiber coverage, faster speeds
Neighborhoods with Similar Populations
- Winter Gardens, Lakeside, CA: less fiber coverage, faster speeds
- Atwater Village, Los Angeles, CA: more fiber coverage, faster speeds
- Aurora Highlands, Arlington, VA: more fiber coverage, slower speeds
- Green Haven, Pasadena, MD: more fiber coverage, slower speeds
- Bayshore-Klatt, Anchorage, AK: less fiber coverage, slower speeds
- Northwest Nashua, Nashua, NH: more fiber coverage, slower speeds
- North End, Bridgeport, CT: more fiber coverage, faster speeds
- North Hills, El Paso, TX: more fiber coverage, faster speeds
- North Hyde Park, Tampa, FL: more fiber coverage, faster speeds
- North King St, Hampton, VA: less fiber coverage, slower speeds