In 21756 there are 10 residential internet providers covering 99.73% of the zip. The average home can get speeds up to 1,850 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.
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10 Internet Service Providers in 21756
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 21756 are not shown.
21756 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
Availability maps for all providers in 21756
Using the dropdown below, please select a provider. Green indicates nearly all homes have service, red indicates few homes have service, and blank indicates no service.
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Internet service is available in 99.73% of 21756. Using our interactive availability map, you can compare service areas for different providers, we include fiber, cable, DSL, or fixed wireless internet service for all providers who offer it. You will notice that some providers might be listed multiple times for each service. If you find no providers cover the location you're looking at, you can opt for satellite service. The most widely available provider is Antietam Broadband. Now you can call companies in 21756 with more confidence that they might be available.
How fast are internet speeds in 21756?
The map below shows maximum internet speeds by area in 21756.
Internet Speed Key
The average 21756 home can get up to 1,850 Mbps on their internet plan. For most people, the fastest download speed in the zip is 2,300 Mbps, which 34.87% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, less than 1% of homes can only purchase plans up to 25 Mbps. See the internet provider details below for info about their speed and coverage in 21756.
Internet speeds tend to be faster in the northeast parts of 21756, and slower in the southwest areas of the zip.
What type of internet should I choose in 21756?
The fastest internet for you may vary based on where in 21756 you live. If speed is your main concern, cable will be the fastest internet in the zip.
- Fiber is the fastest internet type for 34.87% of 21756 homes.
- Cable is fastest for 64.61% 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 21756 homes.
Internet Market Health in 21756
Internet Competition Key
The map shows how competitive the 21756 internet service market is. Areas in green have more alternatives, areas in yellow have a few choices, and areas in red may have only one provider. More competition usually means faster speeds and better prices for you, the customer.
Below are quick facts on internet competition and market health in 21756 based on what connections the average home has availabile:
- Average number of internet service providers to a home: 5.7 (healthy)
- Average types of service (fiber, cable, DSL, etc): 2.3 (unhealthy)
- Average providers with broadband (25 Mbps+) speeds: 4.7 (healthy)
Overall, competition is unhealthy.
21756 internet customers have the ability to buy internet service from 1 to 9 different providers, depending on where they live. For different types of service, 21756 homes have between 1 and 3 options. The type(s) of service available are cable, fixed wireless, and fiber, though these may vary depending on the region within the zip.
When it comes to broadband download speeds faster than 25 Mbps, the situation is worse. 21756 internet customers who want faster speeds have between 1 and 8 choices of companies offering speeds up to or over 25 Mbps.
More internet companies with faster speeds means fewer monopolies and better prices for customers. In promoting a free market for internet, 21756 needs improvement.
TV & Internet Providers in Depth
Below you'll find which TV and internet providers offer service in 21756, along with details on where in 21756 and at what speeds.
XFINITY from Comcast Cable in 21756, MD
XFINITY cable coverage
About 67.57%, or 2,488 people, have XFINITY cable internet available to them in the zip. The company covers the north, west, central, east, northwest, southwest, south, and northeast 21756 area. XFINITY is one of the largest internet service providers internet service providers in the US, with internet service available in much of 21756.
XFINITY from Comcast cable download speeds
XFINITY is above average when comparing download speeds to all other internet providers in 21756. Versus other cable providers in the area, XFINITY cable is the fastest. There are 2 different maximum speeds throughout 21756. The fastest plan anyone in 21756 can order from XFINITY goes up to 2,000 Mbps, the slowest package only goes up to 1,200 Mbps, and the zip-wide average maximum speed for 21756 customers is up to 1,924 Mbps.
Show all download speeds
- 90.5% up to 2,000.0 Mbps
- 9.5% up to 1,200.0 Mbps
XFINITY from Comcast cable upload speeds
In 21756 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 21756 cable providers. XFINITY offers 2 different upload speeds across the zip, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in 21756 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 230 Mbps.
Show all upload speeds
- 90.5% up to 250.0 Mbps
- 9.5% up to 35.0 Mbps
Antietam Broadband Cable in 21756, MD
Antietam Broadband cable coverage
About 59.23%, or 2,181 people, have Antietam Broadband cable internet available to them in the zip. The company covers the southeast, west, southwest, east, central, south, north, and northwest 21756 area. Antietam Broadband is a large internet service provider internet service providers in the US, with internet service available in a majority of 21756.
Antietam Broadband cable download speeds
Antietam Broadband is above average when comparing download speeds to all other internet providers in 21756. Versus other cable providers in the area, Antietam Broadband cable is the slowest. There are no different maximum speeds throughout 21756. The fastest plan anyone in 21756 can order from Antietam Broadband goes up to 1,300 Mbps, and all 21756 customers can get this speed.
Show all download speeds
- 100.0% up to 1,300.0 Mbps
Antietam Broadband cable upload speeds
In 21756 download speeds tend to be faster than than upload speeds for Antietam Broadband cable. Compared to other ISPs, Antietam Broadband is below average where upload speeds are concerned, and the slowest compared to other 21756 cable providers. Antietam Broadband offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 21756 is up to 50 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 50.0 Mbps
Antietam Broadband Fiber in 21756, MD
Antietam Broadband fiber coverage
About 34.87%, or 1,284 people, have Antietam Broadband fiber internet available to them in the zip. The company covers the north, west, northwest, and northeast 21756 area. Antietam Broadband is a large internet service provider internet service providers in the US, with internet service available in a small portion of 21756.
Antietam Broadband fiber download speeds
Antietam Broadband is the fastest when comparing download speeds to all other internet providers in 21756. Versus other fiber providers in the area, Antietam Broadband fiber is the fastest. There are no different maximum speeds throughout 21756. The fastest plan anyone in 21756 can order from Antietam Broadband goes up to 2,300 Mbps, and all 21756 customers can get this speed.
Show all download speeds
- 100.0% up to 2,300.0 Mbps
Antietam Broadband fiber upload speeds
In 21756 download speeds tend to be equal to than upload speeds for Antietam Broadband fiber. Compared to other ISPs, Antietam Broadband is the fastest where upload speeds are concerned, and the fastest compared to other 21756 fiber providers. Antietam Broadband offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 21756 is up to 2,300 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 2,300.0 Mbps
T-Mobile Home Internet Fixed Wireless in 21756, MD
T-Mobile Home Internet fixed wireless coverage
About 95.41%, or 3,513 people, have T-Mobile Home Internet fixed wireless internet available to them in the zip. The company covers the entire 21756 area. T-Mobile Home Internet is one of the largest internet service providers internet service providers in the US, with internet service available in most of 21756.
T-Mobile Home Internet fixed wireless download speeds
T-Mobile Home Internet is below average when comparing download speeds to all other internet providers in 21756. Versus other fixed wireless providers in the area, T-Mobile Home Internet fixed wireless is below average. There are 2 different maximum speeds throughout 21756. The fastest plan anyone in 21756 can order from T-Mobile Home Internet goes up to 100 Mbps, the slowest package only goes up to 25 Mbps, and the zip-wide average maximum speed for 21756 customers is up to 40 Mbps.
Show all download speeds
- 20.3% up to 100.0 Mbps
- 79.7% up to 25.0 Mbps
T-Mobile Home Internet fixed wireless upload speeds
In 21756 download speeds tend to be faster than than upload speeds for T-Mobile Home Internet fixed wireless. Compared to other ISPs, T-Mobile Home Internet is below average where upload speeds are concerned, and below average compared to other 21756 fixed wireless providers. T-Mobile Home Internet offers 2 different upload speeds across the zip, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in 21756 is up to 20 Mbps. Some customers have slower plan choices, which only go up to 3.0 Mbps. On average, T-Mobile Home Internet customers can get speeds up to 6.5 Mbps.
Show all upload speeds
- 20.3% up to 20.0 Mbps
- 79.7% up to 3.0 Mbps
US Cellular Fixed Wireless in 21756, MD
US Cellular fixed wireless coverage
About 91.80%, or 3,380 people, have US Cellular fixed wireless internet available to them in the zip. The company covers the north, southeast, west, east, central, southwest, northwest, and south 21756 area. US Cellular is one of the largest internet service providers internet service providers in the US, with internet service available in most of 21756.
US Cellular fixed wireless download speeds
US Cellular is the slowest when comparing download speeds to all other internet providers in 21756. Versus other fixed wireless providers in the area, US Cellular fixed wireless is the slowest. There are 2 different maximum speeds throughout 21756. The fastest plan anyone in 21756 can order from US Cellular goes up to 25 Mbps, the slowest package only goes up to 10 Mbps, and the zip-wide average maximum speed for 21756 customers is up to 12 Mbps.
Show all download speeds
- 11.9% up to 25.0 Mbps
- 88.1% up to 10.0 Mbps
US Cellular fixed wireless upload speeds
In 21756 download speeds tend to be faster than than upload speeds for US Cellular fixed wireless. Compared to other ISPs, US Cellular is the slowest where upload speeds are concerned, and the slowest compared to other 21756 fixed wireless providers. US Cellular offers 2 different upload speeds across the zip, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in 21756 is up to 3.0 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, US Cellular customers can get speeds up to 1.2 Mbps.
Show all upload speeds
- 11.9% up to 3.0 Mbps
- 88.1% up to 1.0 Mbps
EarthLink Fixed Wireless in 21756, MD
EarthLink fixed wireless coverage
About 75.26%, or 2,771 people, have EarthLink fixed wireless internet available to them in the zip. The company covers the entire 21756 area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in much of 21756.
EarthLink fixed wireless download speeds
EarthLink is below average when comparing download speeds to all other internet providers in 21756. Versus other fixed wireless providers in the area, EarthLink fixed wireless is below average. There are 5 different maximum speeds throughout 21756. The fastest plan anyone in 21756 can order from EarthLink goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the zip-wide average maximum speed for 21756 customers is up to 39 Mbps.
Show all download speeds
- 17.3% up to 100.0 Mbps
- 11.4% up to 50.0 Mbps
- 3.1% up to 30.0 Mbps
- 58.2% up to 25.0 Mbps
- 10.1% up to 10.0 Mbps
EarthLink fixed wireless upload speeds
In 21756 download speeds tend to be faster than than upload speeds for EarthLink fixed wireless. Compared to other ISPs, EarthLink is below average where upload speeds are concerned, and average compared to other 21756 fixed wireless providers. EarthLink offers 4 different upload speeds across the zip, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in 21756 is up to 30 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, EarthLink customers can get speeds up to 9.3 Mbps.
Show all upload speeds
- 10.8% up to 30.0 Mbps
- 21.0% up to 20.0 Mbps
- 58.2% up to 3.0 Mbps
- 10.1% up to 1.0 Mbps
AT&T Fixed Wireless in 21756, MD
AT&T fixed wireless coverage
About 73.68%, or 2,713 people, have AT&T fixed wireless internet available to them in the zip. The company covers the entire 21756 area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in much of 21756.
AT&T fixed wireless download speeds
AT&T is below average when comparing download speeds to all other internet providers in 21756. Versus other fixed wireless providers in the area, AT&T fixed wireless is below average. There are 2 different maximum speeds throughout 21756. The fastest plan anyone in 21756 can order from AT&T goes up to 100 Mbps, the slowest package only goes up to 25 Mbps, and the zip-wide average maximum speed for 21756 customers is up to 34 Mbps.
Show all download speeds
- 12.5% up to 100.0 Mbps
- 87.5% up to 25.0 Mbps
AT&T fixed wireless upload speeds
In 21756 download speeds tend to be faster than than upload speeds for AT&T fixed wireless. Compared to other ISPs, AT&T is below average where upload speeds are concerned, and below average compared to other 21756 fixed wireless providers. AT&T offers 2 different upload speeds across the zip, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in 21756 is up to 20 Mbps. Some customers have slower plan choices, which only go up to 3.0 Mbps. On average, AT&T customers can get speeds up to 5.1 Mbps.
Show all upload speeds
- 12.5% up to 20.0 Mbps
- 87.5% up to 3.0 Mbps
Verizon Fixed Wireless in 21756, MD
Verizon fixed wireless coverage
About 48.51%, or 1,786 people, have Verizon fixed wireless internet available to them in the zip. The company covers the north, central, east, west, and northwest 21756 area. Verizon is one of the largest internet service providers internet service providers in the US, with internet service available in some of 21756.
Verizon fixed wireless download speeds
Verizon is below average when comparing download speeds to all other internet providers in 21756. Versus other fixed wireless providers in the area, Verizon fixed wireless is the fastest. There are no different maximum speeds throughout 21756. The fastest plan anyone in 21756 can order from Verizon goes up to 300 Mbps, and all 21756 customers can get this speed.
Show all download speeds
- 100.0% up to 300.0 Mbps
Verizon fixed wireless upload speeds
In 21756 download speeds tend to be faster than than upload speeds for Verizon fixed wireless. Compared to other ISPs, Verizon is below average where upload speeds are concerned, and the fastest compared to other 21756 fixed wireless providers. Verizon offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 21756 is up to 20 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 20.0 Mbps
One Ring Networks Fixed Wireless in 21756, MD
One Ring Networks fixed wireless coverage
About 26.59%, or 979 people, have One Ring Networks fixed wireless internet available to them in the zip. The company covers the west, north, east, southeast, northwest, and southwest 21756 area. One Ring Networks is a large internet service provider internet service providers in the US, with internet service available in a small portion of 21756.
One Ring Networks fixed wireless download speeds
One Ring Networks is below average when comparing download speeds to all other internet providers in 21756. Versus other fixed wireless providers in the area, One Ring Networks fixed wireless is below average. There are 4 different maximum speeds throughout 21756. The fastest plan anyone in 21756 can order from One Ring Networks goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the zip-wide average maximum speed for 21756 customers is up to 45 Mbps.
Show all download speeds
- 30.4% up to 100.0 Mbps
- 13.7% up to 50.0 Mbps
- 10.9% up to 30.0 Mbps
- 44.9% up to 10.0 Mbps
One Ring Networks fixed wireless upload speeds
In 21756 download speeds tend to be faster than than upload speeds for One Ring Networks fixed wireless. Compared to other ISPs, One Ring Networks is below average where upload speeds are concerned, and above average compared to other 21756 fixed wireless providers. One Ring Networks offers 4 different upload speeds across the zip, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in 21756 is up to 30 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, One Ring Networks customers can get speeds up to 14 Mbps.
Show all upload speeds
- 30.4% up to 30.0 Mbps
- 22.4% up to 20.0 Mbps
- 2.2% up to 10.0 Mbps
- 44.9% up to 1.0 Mbps
21756 Internet by Area
This information is most helpful to those looking for homes or considering moving to 21756 or any of the areas nearby.
How does internet in 21756 compare to the rest of Maryland?
Internet speeds in 21756 are slower versus the average speeds in Maryland: 2,041 Mbps in Maryland versus 1,850 Mbps in the zip. The state has similar internet availability compared to the zip. Average internet coverage in Maryland is 98.96% versus 99.73% in 21756.
What zip codes have widespread internet?
Internet coverage varies by zip code and neighborhood. Some examples in or around 21756 are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does internet service 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
- 21782, MD: more internet coverage, slower speeds
- 21779, MD: more internet coverage, slower speeds
- 21713, MD: less internet coverage, slower speeds
- 21718, MD: more internet coverage, faster speeds
- 25443, WV: less internet coverage, faster speeds
- 21733, MD: more internet coverage, slower speeds
- 21746, MD: more internet coverage, slower speeds
- 21781, MD: more internet coverage, slower speeds
- 21769, MD: more internet coverage, faster speeds
- 21773, MD: more internet coverage, slower speeds
Zip Codes with Similar Populations
- 95546, CA: less internet coverage, slower speeds
- 98631, WA: more internet coverage, slower speeds
- 02576, MA: more internet coverage, slower speeds
- 08327, NJ: less internet coverage, slower speeds
- 78383, TX: less internet coverage, slower speeds
- 74058, OK: less internet coverage, slower speeds
- 64070, MO: more internet coverage, slower speeds
- 54738, WI: more internet coverage, slower speeds
- 55604, MN: less internet coverage, slower speeds
- 59859, MT: less internet coverage, slower speeds