In Adelphi there are 2 residential Cable providers covering 100.00% of the city. The average home can get speeds up to 1,963 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 Cable internet providers in Adelphi, MD.
To see availability maps for all providers including fiber, cable, DSL, and more in Adelphi, MD please click below.
Cable Internet Service Providers in Adelphi
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 Adelphi are not shown.
Adelphi 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 Adelphi is cable internet available?
Cable Internet Availability Key
Cable is available in 100.00% of Adelphi. Areas in green have cable internet service, where areas in yellow or red may not. The most widely available provider is XFINITY. Call one of the companies with service in Adelphi above to see who has service at your home.
How fast is cable internet in Adelphi?
The map below shows maximum cable internet speeds by area in Adelphi.
Cable Internet Speed Key
The average Adelphi home can get up to 1,963 Mbps on their cable internet plan. The fastest cable download speed in the city is 2,000 Mbps, which 95.38% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 4.62% of homes can only purchase plans up to 1,200 Mbps. See the internet provider details below for info about their speed and coverage in Adelphi.
Cable internet speeds tend to be faster in the west parts of Adelphi, and slower in the southeast areas of the city.
Is cable the fastest internet I can get in Adelphi?
The fastest internet for you may vary based on where in Adelphi you live. In general, fiber competes most often with cable in the city.
- Fiber is the fastest internet type for 73.48% of Adelphi homes.
- Cable is fastest for 26.52% 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 Adelphi homes.
Cable Providers in Depth
Below you'll find which TV and internet providers offer service in Adelphi, along with details on where in Adelphi and at what speeds.
XFINITY from Comcast Cable in Adelphi, MD
XFINITY cable coverage
About 100.00%, or 16,100 people, have XFINITY cable internet available to them in the city. The company covers the entire Adelphi area. XFINITY is one of the largest internet service providers internet service providers in the US, with internet service available in every corner of Adelphi.
XFINITY from Comcast cable download speeds
XFINITY is the fastest when comparing download speeds to all other internet providers in Adelphi. Versus other cable providers in the area, XFINITY cable is the fastest. There are 2 different maximum speeds throughout Adelphi. The fastest plan anyone in Adelphi can order from XFINITY goes up to 2,000 Mbps, the slowest package only goes up to 1,200 Mbps, and the city-wide average maximum speed for Adelphi customers is up to 1,963 Mbps.
Show all download speeds
- 95.4% up to 2,000.0 Mbps
- 4.6% up to 1,200.0 Mbps
XFINITY from Comcast cable upload speeds
In Adelphi download speeds tend to be faster than than upload speeds for XFINITY cable. Compared to other ISPs, XFINITY is below average where upload speeds are concerned, and the fastest compared to other Adelphi cable providers. XFINITY 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 Adelphi is up to 250 Mbps. Some customers have slower plan choices, which only go up to 35 Mbps. On average, XFINITY customers can get speeds up to 240 Mbps.
Show all upload speeds
- 95.4% up to 250.0 Mbps
- 4.6% up to 35.0 Mbps
Astound Broadband Cable in Adelphi, MD
Astound Broadband cable coverage
About 11.25%, or 1,811 people, have Astound Broadband cable internet available to them in the city. The company covers the northwest and north Adelphi area. Astound Broadband is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of Adelphi.
Astound Broadband cable download speeds
Astound Broadband is above average when comparing download speeds to all other internet providers in Adelphi. Versus other cable providers in the area, Astound Broadband cable is the slowest. There are no different maximum speeds throughout Adelphi. The fastest plan anyone in Adelphi can order from Astound Broadband goes up to 1,500 Mbps, and all Adelphi customers can get this speed.
Show all download speeds
- 100.0% up to 1,500.0 Mbps
Astound Broadband cable upload speeds
In Adelphi download speeds tend to be faster than than upload speeds for Astound Broadband cable. Compared to other ISPs, Astound Broadband is below average where upload speeds are concerned, and the slowest compared to other Adelphi cable providers. Astound Broadband offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Adelphi is up to 50 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 50.0 Mbps
Adelphi Cable by Area
This information is most helpful to those looking for homes or considering moving to Adelphi or any of the areas nearby.
How does cable internet in Adelphi compare to the rest of Maryland?
Cable internet speeds in Adelphi are much faster versus the average speeds in Maryland: 0.00 Mbps in Maryland versus 1,963 Mbps in the city. The state has similar cable availability compared to the city. Average cable coverage in Maryland is 0.00% versus 100.00% in Adelphi.
What zip codes have cable internet?
Cable internet coverage varies by zip code and neighborhood. Some examples in or around Adelphi are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does cable 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
- College Park, MD: less cable coverage, faster speeds
- Takoma Park, MD: less cable coverage, slower speeds
- Chillum, MD: less cable coverage, slower speeds
- University Park, MD: equal cable coverage, faster speeds
- Hyattsville, MD: less cable coverage, slower speeds
- Four Corners, MD: equal cable coverage, slower speeds
- Silver Spring, MD: less cable coverage, slower speeds
- White Oak, MD: less cable coverage, slower speeds
- Berwyn Heights, MD: equal cable coverage, faster speeds
- Riverdale Park, MD: equal cable coverage, faster speeds
Cities with Similar Populations
- Franklin Park, PA: equal cable coverage, slower speeds
- North Chicago, IL: less cable coverage, faster speeds
- Shively, KY: equal cable coverage, slower speeds
- Lindale, TX: less cable coverage, slower speeds
- Ludington, MI: less cable coverage, slower speeds
- South Houston, TX: less cable coverage, faster speeds
- Beech Grove, IN: equal cable coverage, slower speeds
- Vermilion, OH: less cable coverage, slower speeds
- Kailua-Kona, HI: less cable coverage, slower speeds
- Bellevue, WI: less cable coverage, slower speeds