In 21157 there are 10 residential internet providers covering 99.06% of the zip. The average home can get speeds up to 2,092 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 21157
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 21157 are not shown.
21157 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 21157
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 99.06% of 21157. 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 XFINITY. Now you can call companies in 21157 with more confidence that they might be available.
How fast are internet speeds in 21157?
The map below shows maximum internet speeds by area in 21157.
Internet Speed Key
The average 21157 home can get up to 2,092 Mbps on their internet plan. For most people, the fastest download speed in the zip is 5,000 Mbps, which 7.35% 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 21157.
Internet speeds tend to be faster in the north parts of 21157, and slower in the southwest areas of the zip.
What type of internet should I choose in 21157?
The fastest internet for you may vary based on where in 21157 you live. If speed is your main concern, cable will be the fastest internet in the zip.
- Fiber is the fastest internet type for 27.73% of 21157 homes.
- Cable is fastest for 71.10% 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 21157 homes.
Internet Market Health in 21157
Internet Competition Key
The map shows how competitive the 21157 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 21157 based on what connections the average home has availabile:
- Average number of internet service providers to a home: 5.1 (healthy)
- Average types of service (fiber, cable, DSL, etc): 2.5 (unhealthy)
- Average providers with broadband (25 Mbps+) speeds: 5.1 (healthy)
Overall, competition is healthy.
21157 internet customers have the ability to buy internet service from 1 to 8 different providers, depending on where they live. For different types of service, 21157 homes have between 1 and 3 options. The type(s) of service available are fixed wireless, cable, 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 similar. 21157 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, 21157 is doing better than most.
TV & Internet Providers in Depth
Below you'll find which TV and internet providers offer service in 21157, along with details on where in 21157 and at what speeds.
XFINITY from Comcast Cable in 21157, MD
XFINITY cable coverage
About 98.74%, or 38,282 people, have XFINITY cable internet available to them in the zip. The company covers the entire 21157 area. XFINITY is one of the largest internet service providers internet service providers in the US, with internet service available in most of 21157.
XFINITY from Comcast cable download speeds
XFINITY is above average when comparing download speeds to all other internet providers in 21157. Versus other cable providers in the area, XFINITY cable is the fastest. There are 2 different maximum speeds throughout 21157. The fastest plan anyone in 21157 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 21157 customers is up to 1,860 Mbps.
Show all download speeds
- 82.5% up to 2,000.0 Mbps
- 17.5% up to 1,200.0 Mbps
XFINITY from Comcast cable upload speeds
In 21157 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 21157 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 21157 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 212 Mbps.
Show all upload speeds
- 82.5% up to 250.0 Mbps
- 17.5% up to 35.0 Mbps
ting Fiber in 21157, MD
ting fiber coverage
About 27.53%, or 10,674 people, have ting fiber internet available to them in the zip. The company covers the central, northwest, west, north, northeast, south, east, and southeast 21157 area. ting is a large internet service provider internet service providers in the US, with internet service available in a small portion of 21157.
ting fiber download speeds
ting is below average when comparing download speeds to all other internet providers in 21157. Versus other fiber providers in the area, ting fiber is the slowest. There are no different maximum speeds throughout 21157. The fastest plan anyone in 21157 can order from ting goes up to 1,000 Mbps, and all 21157 customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
ting fiber upload speeds
In 21157 download speeds tend to be equal to than upload speeds for ting fiber. Compared to other ISPs, ting is above average where upload speeds are concerned, and below average compared to other 21157 fiber providers. ting offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 21157 is up to 1,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1,000.0 Mbps
XFINITY from Comcast Fiber in 21157, MD
XFINITY fiber coverage
About 13.69%, or 5,306 people, have XFINITY fiber internet available to them in the zip. The company covers the southeast, southwest, northeast, and south 21157 area. XFINITY is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of 21157.
XFINITY from Comcast fiber download speeds
XFINITY is above average when comparing download speeds to all other internet providers in 21157. Versus other fiber providers in the area, XFINITY fiber is below average. There are 2 different maximum speeds throughout 21157. The fastest plan anyone in 21157 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 21157 customers is up to 1,818 Mbps.
Show all download speeds
- 77.3% up to 2,000.0 Mbps
- 22.7% up to 1,200.0 Mbps
XFINITY from Comcast fiber upload speeds
In 21157 download speeds tend to be faster than than upload speeds for XFINITY fiber. Compared to other ISPs, XFINITY is below average where upload speeds are concerned, and the slowest compared to other 21157 fiber providers. XFINITY offers 3 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 21157 is up to 1,000 Mbps. Some customers have slower plan choices, which only go up to 35 Mbps. On average, XFINITY customers can get speeds up to 212 Mbps.
Show all upload speeds
- 1.5% up to 1,000.0 Mbps
- 75.8% up to 250.0 Mbps
- 22.7% up to 35.0 Mbps
Quantum Internet Service Fiber in 21157, MD
Quantum Internet Service fiber coverage
About 9.49%, or 3,678 people, have Quantum Internet Service fiber internet available to them in the zip. The company covers the central, northeast, west, southwest, northwest, and east 21157 area. Quantum Internet Service is a large internet service provider internet service providers in the US, with internet service available in a very small piece of 21157.
Quantum Internet Service fiber download speeds
Quantum Internet Service is above average when comparing download speeds to all other internet providers in 21157. Versus other fiber providers in the area, Quantum Internet Service fiber is below average. There are no different maximum speeds throughout 21157. The fastest plan anyone in 21157 can order from Quantum Internet Service goes up to 2,000 Mbps, and all 21157 customers can get this speed.
Show all download speeds
- 100.0% up to 2,000.0 Mbps
Quantum Internet Service fiber upload speeds
In 21157 download speeds tend to be equal to than upload speeds for Quantum Internet Service fiber. Compared to other ISPs, Quantum Internet Service is above average where upload speeds are concerned, and below average compared to other 21157 fiber providers. Quantum Internet Service offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 21157 is up to 2,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 2,000.0 Mbps
Antietam Broadband Fiber in 21157, MD
Antietam Broadband fiber coverage
About 7.35%, or 2,851 people, have Antietam Broadband fiber internet available to them in the zip. The company covers the northeast and north 21157 area. Antietam Broadband is a large internet service provider internet service providers in the US, with internet service available in a very small piece of 21157.
Antietam Broadband fiber download speeds
Antietam Broadband is the fastest when comparing download speeds to all other internet providers in 21157. Versus other fiber providers in the area, Antietam Broadband fiber is the fastest. There are no different maximum speeds throughout 21157. The fastest plan anyone in 21157 can order from Antietam Broadband goes up to 5,000 Mbps, and all 21157 customers can get this speed.
Show all download speeds
- 100.0% up to 5,000.0 Mbps
Antietam Broadband fiber upload speeds
In 21157 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 21157 fiber providers. Antietam Broadband offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 21157 is up to 5,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 5,000.0 Mbps
T-Mobile Home Internet Fixed Wireless in 21157, MD
T-Mobile Home Internet fixed wireless coverage
About 96.81%, or 37,535 people, have T-Mobile Home Internet fixed wireless internet available to them in the zip. The company covers the entire 21157 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 21157.
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 21157. Versus other fixed wireless providers in the area, T-Mobile Home Internet fixed wireless is below average. There are 2 different maximum speeds throughout 21157. The fastest plan anyone in 21157 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 21157 customers is up to 56 Mbps.
Show all download speeds
- 41.3% up to 100.0 Mbps
- 58.7% up to 25.0 Mbps
T-Mobile Home Internet fixed wireless upload speeds
In 21157 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 average compared to other 21157 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 21157 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 10 Mbps.
Show all upload speeds
- 41.3% up to 20.0 Mbps
- 58.7% up to 3.0 Mbps
EarthLink Fixed Wireless in 21157, MD
EarthLink fixed wireless coverage
About 87.87%, or 34,069 people, have EarthLink fixed wireless internet available to them in the zip. The company covers the entire 21157 area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in most of 21157.
EarthLink fixed wireless download speeds
EarthLink is below average when comparing download speeds to all other internet providers in 21157. Versus other fixed wireless providers in the area, EarthLink fixed wireless is below average. There are 2 different maximum speeds throughout 21157. The fastest plan anyone in 21157 can order from EarthLink goes up to 100 Mbps, the slowest package only goes up to 25 Mbps, and the zip-wide average maximum speed for 21157 customers is up to 38 Mbps.
Show all download speeds
- 17.1% up to 100.0 Mbps
- 82.9% up to 25.0 Mbps
EarthLink fixed wireless upload speeds
In 21157 download speeds tend to be faster than than upload speeds for EarthLink fixed wireless. Compared to other ISPs, EarthLink is one of the slowest where upload speeds are concerned, and one of the slowest compared to other 21157 fixed wireless providers. EarthLink 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 21157 is up to 20 Mbps. Some customers have slower plan choices, which only go up to 3.0 Mbps. On average, EarthLink customers can get speeds up to 5.9 Mbps.
Show all upload speeds
- 17.1% up to 20.0 Mbps
- 82.9% up to 3.0 Mbps
AT&T Fixed Wireless in 21157, MD
AT&T fixed wireless coverage
About 87.87%, or 34,069 people, have AT&T fixed wireless internet available to them in the zip. The company covers the entire 21157 area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in most of 21157.
AT&T fixed wireless download speeds
AT&T is below average when comparing download speeds to all other internet providers in 21157. Versus other fixed wireless providers in the area, AT&T fixed wireless is below average. There are 2 different maximum speeds throughout 21157. The fastest plan anyone in 21157 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 21157 customers is up to 38 Mbps.
Show all download speeds
- 17.1% up to 100.0 Mbps
- 82.9% up to 25.0 Mbps
AT&T fixed wireless upload speeds
In 21157 download speeds tend to be faster than than upload speeds for AT&T fixed wireless. Compared to other ISPs, AT&T is one of the slowest where upload speeds are concerned, and one of the slowest compared to other 21157 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 21157 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 5.9 Mbps.
Show all upload speeds
- 17.1% up to 20.0 Mbps
- 82.9% up to 3.0 Mbps
Verizon Fixed Wireless in 21157, MD
Verizon fixed wireless coverage
About 64.73%, or 25,094 people, have Verizon fixed wireless internet available to them in the zip. The company covers the entire 21157 area. Verizon is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of 21157.
Verizon fixed wireless download speeds
Verizon is below average when comparing download speeds to all other internet providers in 21157. Versus other fixed wireless providers in the area, Verizon fixed wireless is the fastest. There are no different maximum speeds throughout 21157. The fastest plan anyone in 21157 can order from Verizon goes up to 300 Mbps, and all 21157 customers can get this speed.
Show all download speeds
- 100.0% up to 300.0 Mbps
Verizon fixed wireless upload speeds
In 21157 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 21157 fixed wireless providers. Verizon offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 21157 is up to 20 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 20.0 Mbps
Quantum Internet Service Fixed Wireless in 21157, MD
Quantum Internet Service fixed wireless coverage
About 15.80%, or 6,127 people, have Quantum Internet Service fixed wireless internet available to them in the zip. The company covers the northeast, northwest, west, north, central, and east 21157 area. Quantum Internet Service is a large internet service provider internet service providers in the US, with internet service available in a small portion of 21157.
Quantum Internet Service fixed wireless download speeds
Quantum Internet Service is the slowest when comparing download speeds to all other internet providers in 21157. Versus other fixed wireless providers in the area, Quantum Internet Service fixed wireless is the slowest. There are no different maximum speeds throughout 21157. The fastest plan anyone in 21157 can order from Quantum Internet Service goes up to 30 Mbps, and all 21157 customers can get this speed.
Show all download speeds
- 100.0% up to 30.0 Mbps
Quantum Internet Service fixed wireless upload speeds
In 21157 download speeds tend to be faster than than upload speeds for Quantum Internet Service fixed wireless. Compared to other ISPs, Quantum Internet Service is below average where upload speeds are concerned, and average compared to other 21157 fixed wireless providers. Quantum Internet Service offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 21157 is up to 10 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 10.0 Mbps
21157 Internet by Area
This information is most helpful to those looking for homes or considering moving to 21157 or any of the areas nearby.
How does internet in 21157 compare to the rest of Maryland?
Internet speeds in 21157 are comparable versus the average speeds in Maryland: 2,041 Mbps in Maryland versus 2,092 Mbps in the zip. The state has similar internet availability compared to the zip. Average internet coverage in Maryland is 98.96% versus 99.06% in 21157.
What zip codes have widespread internet?
Internet coverage varies by zip code and neighborhood. Some examples in or around 21157 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
- 21158, MD: more internet coverage, slower speeds
- 21048, MD: more internet coverage, slower speeds
- 21776, MD: more internet coverage, faster speeds
- 21074, MD: more internet coverage, faster speeds
- 21155, MD: more internet coverage, slower speeds
- 21102, MD: more internet coverage, faster speeds
- 21791, MD: more internet coverage, slower speeds
- 21071, MD: more internet coverage, slower speeds
- 21136, MD: more internet coverage, slower speeds
- 21787, MD: more internet coverage, faster speeds
Zip Codes with Similar Populations
- 78412, TX: more internet coverage, faster speeds
- 75042, TX: more internet coverage, faster speeds
- 75069, TX: more internet coverage, faster speeds
- 28451, NC: less internet coverage, faster speeds
- 28411, NC: more internet coverage, faster speeds
- 28403, NC: less internet coverage, faster speeds
- 75220, TX: more internet coverage, faster speeds
- 77382, TX: more internet coverage, faster speeds
- 77520, TX: less internet coverage, faster speeds
- 27704, NC: more internet coverage, faster speeds