In 21657 there are 2 residential Cable providers covering 58.29% of the zip. The average home can get speeds up to 1,376 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 21657, MD.
To see availability maps for all providers including fiber, cable, DSL, and more in 21657, MD please click below.
Cable Internet Service Providers in 21657
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 21657 are not shown.
21657 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 21657 is cable internet available?
Cable Internet Availability Key
Cable is available in 58.29% of 21657. 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 21657 above to see who has service at your home.
How fast is cable internet in 21657?
The map below shows maximum cable internet speeds by area in 21657.
Cable Internet Speed Key
The average 21657 home can get up to 1,376 Mbps on their cable internet plan. The fastest cable download speed in the zip is 2,000 Mbps, which 21.90% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 36.40% 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 21657.
Cable internet speeds tend to be faster in the south parts of 21657, and slower in the northeast areas of the zip.
Is cable the fastest internet I can get in 21657?
The fastest internet for you may vary based on where in 21657 you live. In general, fiber competes most often with cable in the zip.
- Fiber is the fastest internet type for 83.13% of 21657 homes.
- Cable is fastest for 16.87% of the zip.
- 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 21657 homes.
Cable Providers in Depth
Below you'll find which TV and internet providers offer service in 21657, along with details on where in 21657 and at what speeds.
Atlantic Broadband Cable in 21657, MD
Atlantic Broadband cable coverage
About 36.40%, or 384 people, have Atlantic Broadband cable internet available to them in the zip. The company covers the northeast, west, and north 21657 area. Atlantic Broadband is a large internet service provider internet service providers in the US, with internet service available in some of 21657.
Atlantic Broadband cable download speeds
Atlantic Broadband is below average when comparing download speeds to all other internet providers in 21657. Versus other cable providers in the area, Atlantic Broadband cable is the slowest. There are no different maximum speeds throughout 21657. The fastest plan anyone in 21657 can order from Atlantic Broadband goes up to 1,000 Mbps, and all 21657 customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Atlantic Broadband cable upload speeds
In 21657 download speeds tend to be faster than than upload speeds for Atlantic Broadband cable. Compared to other ISPs, Atlantic Broadband is below average where upload speeds are concerned, and the slowest compared to other 21657 cable providers. Atlantic Broadband offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 21657 is up to 50 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 50.0 Mbps
XFINITY from Comcast Cable in 21657, MD
XFINITY cable coverage
About 21.90%, or 231 people, have XFINITY cable internet available to them in the zip. The company covers the south and southeast 21657 area. XFINITY is one of the largest internet service providers internet service providers in the US, with internet service available in a small portion of 21657.
XFINITY from Comcast cable download speeds
XFINITY is above average when comparing download speeds to all other internet providers in 21657. Versus other cable providers in the area, XFINITY cable is the fastest. There are no different maximum speeds throughout 21657. The fastest plan anyone in 21657 can order from XFINITY goes up to 2,000 Mbps, and all 21657 customers can get this speed.
Show all download speeds
- 100.0% up to 2,000.0 Mbps
XFINITY from Comcast cable upload speeds
In 21657 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 21657 cable providers. XFINITY offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 21657 is up to 250 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 250.0 Mbps
21657 Cable by Area
This information is most helpful to those looking for homes or considering moving to 21657 or any of the areas nearby.
How does cable internet in 21657 compare to the rest of Maryland?
Cable internet speeds in 21657 are much faster versus the average speeds in Maryland: 0.00 Mbps in Maryland versus 1,376 Mbps in the zip. The state has similar cable availability compared to the zip. Average cable coverage in Maryland is 0.00% versus 58.29% in 21657.
What zip codes have cable internet?
Cable internet coverage varies by zip code and neighborhood. Some examples in or around 21657 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 zip codes?
Below are zip codes nearby and with similar populations. This comparison can be useful if living somewhere with fast internet is important to you.
Nearby Zip Codes
- 21641, MD: more cable coverage, faster speeds
- 21660, MD: more cable coverage, faster speeds
- 21625, MD: more cable coverage, slower speeds
- 21679, MD: more cable coverage, slower speeds
- 21617, MD: more cable coverage, slower speeds
- 21639, MD: more cable coverage, faster speeds
- 21629, MD: more cable coverage, faster speeds
- 21658, MD: more cable coverage, slower speeds
- 21636, MD: more cable coverage, faster speeds
- 21640, MD: more cable coverage, faster speeds
Zip Codes with Similar Populations
- 72436, AR: less cable coverage, slower speeds
- 71065, LA: less cable coverage, slower speeds
- 70036, LA: more cable coverage, faster speeds
- 68758, NE: more cable coverage, slower speeds
- 55367, MN: less cable coverage, slower speeds
- 53582, WI: more cable coverage, slower speeds
- 99123, WA: more cable coverage, slower speeds
- 59215: less cable coverage, slower speeds
- 73951: less cable coverage, slower speeds
- 73568: less cable coverage, slower speeds