In 21740 there are 11 residential internet providers covering 99.15% of the zip. The average home can get speeds up to 2,032 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.
Jump to Availability Maps
11 Internet Service Providers in 21740
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 21740 are not shown.
21740 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 21740
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.
Please note some providers will take longer to load than others
Internet service is available in 99.15% of 21740. 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 21740 with more confidence that they might be available.
How fast are internet speeds in 21740?
The map below shows maximum internet speeds by area in 21740.
Internet Speed Key
The average 21740 home can get up to 2,032 Mbps on their internet plan. For most people, the fastest download speed in the zip is 2,300 Mbps, which 69.91% 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 21740.
Internet speeds tend to be faster in the northeast parts of 21740, and slower in the southeast areas of the zip.
What type of internet should I choose in 21740?
The fastest internet for you may vary based on where in 21740 you live. If speed is your main concern, fiber will be the fastest internet in the zip.
- Fiber is the fastest internet type for 73.52% of 21740 homes.
- Cable is fastest for 25.32% 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 21740 homes.
Internet Market Health in 21740
Internet Competition Key
The map shows how competitive the 21740 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 21740 based on what connections the average home has availabile:
- Average number of internet service providers to a home: 6.8 (very healthy)
- Average types of service (fiber, cable, DSL, etc): 2.9 (healthy)
- Average providers with broadband (25 Mbps+) speeds: 6.5 (very healthy)
Overall, competition is healthy.
21740 internet customers have the ability to buy internet service from 1 to 12 different providers, depending on where they live. For different types of service, 21740 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 worse. 21740 internet customers who want faster speeds have between 1 and 12 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, 21740 is doing better than most.
TV & Internet Providers in Depth
Below you'll find which TV and internet providers offer service in 21740, along with details on where in 21740 and at what speeds.
Antietam Broadband Cable in 21740, MD
Antietam Broadband cable coverage
About 98.03%, or 62,263 people, have Antietam Broadband cable internet available to them in the zip. The company covers the entire 21740 area. Antietam Broadband is a large internet service provider internet service providers in the US, with internet service available in most of 21740.
Antietam Broadband cable download speeds
Antietam Broadband is above average when comparing download speeds to all other internet providers in 21740. Versus other cable providers in the area, Antietam Broadband cable is the slowest. There are no different maximum speeds throughout 21740. The fastest plan anyone in 21740 can order from Antietam Broadband goes up to 1,300 Mbps, and all 21740 customers can get this speed.
Show all download speeds
- 100.0% up to 1,300.0 Mbps
Antietam Broadband cable upload speeds
In 21740 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 21740 cable providers. Antietam Broadband offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 21740 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 21740, MD
Antietam Broadband fiber coverage
About 69.91%, or 44,403 people, have Antietam Broadband fiber internet available to them in the zip. The company covers the entire 21740 area. Antietam Broadband is a large internet service provider internet service providers in the US, with internet service available in much of 21740.
Antietam Broadband fiber download speeds
Antietam Broadband is the fastest when comparing download speeds to all other internet providers in 21740. Versus other fiber providers in the area, Antietam Broadband fiber is the fastest. There are no different maximum speeds throughout 21740. The fastest plan anyone in 21740 can order from Antietam Broadband goes up to 2,300 Mbps, and all 21740 customers can get this speed.
Show all download speeds
- 100.0% up to 2,300.0 Mbps
Antietam Broadband fiber upload speeds
In 21740 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 21740 fiber providers. Antietam Broadband offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 21740 is up to 2,300 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 2,300.0 Mbps
Point Broadband Fiber in 21740, MD
Point Broadband fiber coverage
About 68.59%, or 43,567 people, have Point Broadband fiber internet available to them in the zip. The company covers the entire 21740 area. Point Broadband is a large internet service provider internet service providers in the US, with internet service available in much of 21740.
Point Broadband fiber download speeds
Point Broadband is above average when comparing download speeds to all other internet providers in 21740. Versus other fiber providers in the area, Point Broadband fiber is below average. There are no different maximum speeds throughout 21740. The fastest plan anyone in 21740 can order from Point Broadband goes up to 1,000 Mbps, and all 21740 customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Point Broadband fiber upload speeds
In 21740 download speeds tend to be equal to than upload speeds for Point Broadband fiber. Compared to other ISPs, Point Broadband is above average where upload speeds are concerned, and below average compared to other 21740 fiber providers. Point Broadband offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 21740 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 21740, MD
XFINITY fiber coverage
About 63.81%, or 40,527 people, have XFINITY fiber internet available to them in the zip. The company covers the entire 21740 area. XFINITY is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of 21740.
XFINITY from Comcast fiber download speeds
XFINITY is above average when comparing download speeds to all other internet providers in 21740. Versus other fiber providers in the area, XFINITY fiber is average. There are 3 different maximum speeds throughout 21740. The fastest plan anyone in 21740 can order from XFINITY goes up to 2,000 Mbps, the slowest package only goes up to 1,000 Mbps, and the zip-wide average maximum speed for 21740 customers is up to 1,289 Mbps.
Show all download speeds
- 22.7% up to 2,000.0 Mbps
- 30.9% up to 1,200.0 Mbps
- 46.4% up to 1,000.0 Mbps
XFINITY from Comcast fiber upload speeds
In 21740 download speeds tend to be faster than than upload speeds for XFINITY fiber. Compared to other ISPs, XFINITY is above average where upload speeds are concerned, and the slowest compared to other 21740 fiber providers. XFINITY 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 21740 is up to 2,000 Mbps. Some customers have slower plan choices, which only go up to 35 Mbps. On average, XFINITY customers can get speeds up to 878 Mbps.
Show all upload speeds
- 19.2% up to 2,000.0 Mbps
- 47.9% up to 1,000.0 Mbps
- 1.7% up to 250.0 Mbps
- 31.2% up to 35.0 Mbps
XFINITY from Comcast Cable in 21740, MD
XFINITY cable coverage
About 5.15%, or 3,271 people, have XFINITY cable internet available to them in the zip. The company covers the southwest, southeast, northwest, north, and east 21740 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 21740.
XFINITY from Comcast cable download speeds
XFINITY is above average when comparing download speeds to all other internet providers in 21740. Versus other cable providers in the area, XFINITY cable is the fastest. There are 2 different maximum speeds throughout 21740. The fastest plan anyone in 21740 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 21740 customers is up to 1,838 Mbps.
Show all download speeds
- 79.8% up to 2,000.0 Mbps
- 20.2% up to 1,200.0 Mbps
XFINITY from Comcast cable upload speeds
In 21740 download speeds tend to be faster than than upload speeds for XFINITY cable. Compared to other ISPs, XFINITY is above average where upload speeds are concerned, and the fastest compared to other 21740 cable 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 21740 is up to 2,000 Mbps. Some customers have slower plan choices, which only go up to 35 Mbps. On average, XFINITY customers can get speeds up to 738 Mbps.
Show all upload speeds
- 30.4% up to 2,000.0 Mbps
- 49.4% up to 250.0 Mbps
- 20.2% up to 35.0 Mbps
EarthLink Fiber in 21740, MD
EarthLink fiber coverage
About 2.10%, or 1,333 people, have EarthLink fiber internet available to them in the zip. The company covers the northwest, north, central, and southeast 21740 area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of 21740.
EarthLink fiber download speeds
EarthLink is above average when comparing download speeds to all other internet providers in 21740. Versus other fiber providers in the area, EarthLink fiber is one of the slowest. There are no different maximum speeds throughout 21740. The fastest plan anyone in 21740 can order from EarthLink goes up to 940 Mbps, and all 21740 customers can get this speed.
Show all download speeds
- 100.0% up to 940.0 Mbps
EarthLink fiber upload speeds
In 21740 download speeds tend to be faster than than upload speeds for EarthLink fiber. Compared to other ISPs, EarthLink is above average where upload speeds are concerned, and below average compared to other 21740 fiber providers. EarthLink offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 21740 is up to 880 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 880.0 Mbps
Verizon Fiber in 21740, MD
Verizon fiber coverage
About 2.10%, or 1,333 people, have Verizon fiber internet available to them in the zip. The company covers the northwest, north, central, and southeast 21740 area. Verizon is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of 21740.
Verizon fiber download speeds
Verizon is above average when comparing download speeds to all other internet providers in 21740. Versus other fiber providers in the area, Verizon fiber is one of the slowest. There are no different maximum speeds throughout 21740. The fastest plan anyone in 21740 can order from Verizon goes up to 940 Mbps, and all 21740 customers can get this speed.
Show all download speeds
- 100.0% up to 940.0 Mbps
Verizon fiber upload speeds
In 21740 download speeds tend to be faster than than upload speeds for Verizon fiber. Compared to other ISPs, Verizon is above average where upload speeds are concerned, and below average compared to other 21740 fiber providers. Verizon offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 21740 is up to 880 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 880.0 Mbps
US Cellular Fixed Wireless in 21740, MD
US Cellular fixed wireless coverage
About 97.22%, or 61,748 people, have US Cellular fixed wireless internet available to them in the zip. The company covers the entire 21740 area. US Cellular is one of the largest internet service providers internet service providers in the US, with internet service available in most of 21740.
US Cellular fixed wireless download speeds
US Cellular is the slowest when comparing download speeds to all other internet providers in 21740. Versus other fixed wireless providers in the area, US Cellular fixed wireless is the slowest. There are 2 different maximum speeds throughout 21740. The fastest plan anyone in 21740 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 21740 customers is up to 22 Mbps.
Show all download speeds
- 81.1% up to 25.0 Mbps
- 18.9% up to 10.0 Mbps
US Cellular fixed wireless upload speeds
In 21740 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 21740 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 21740 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 2.6 Mbps.
Show all upload speeds
- 81.1% up to 3.0 Mbps
- 18.9% up to 1.0 Mbps
T-Mobile Home Internet Fixed Wireless in 21740, MD
T-Mobile Home Internet fixed wireless coverage
About 88.54%, or 56,234 people, have T-Mobile Home Internet fixed wireless internet available to them in the zip. The company covers the entire 21740 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 21740.
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 21740. Versus other fixed wireless providers in the area, T-Mobile Home Internet fixed wireless is below average. There are 2 different maximum speeds throughout 21740. The fastest plan anyone in 21740 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 21740 customers is up to 48 Mbps.
Show all download speeds
- 30.7% up to 100.0 Mbps
- 69.3% up to 25.0 Mbps
T-Mobile Home Internet fixed wireless upload speeds
In 21740 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 21740 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 21740 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 8.2 Mbps.
Show all upload speeds
- 30.7% up to 20.0 Mbps
- 69.3% up to 3.0 Mbps
EarthLink Fixed Wireless in 21740, MD
EarthLink fixed wireless coverage
About 56.74%, or 36,039 people, have EarthLink fixed wireless internet available to them in the zip. The company covers the entire 21740 area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of 21740.
EarthLink fixed wireless download speeds
EarthLink is below average when comparing download speeds to all other internet providers in 21740. Versus other fixed wireless providers in the area, EarthLink fixed wireless is below average. There are 7 different maximum speeds throughout 21740. The fastest plan anyone in 21740 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 21740 customers is up to 39 Mbps.
Show all download speeds
- 17.5% up to 100.0 Mbps
- 0.1% up to 80.0 Mbps
- 5.8% up to 50.0 Mbps
- 3.8% up to 40.0 Mbps
- 4.1% up to 30.0 Mbps
- 59.2% up to 25.0 Mbps
- 9.5% up to 10.0 Mbps
EarthLink fixed wireless upload speeds
In 21740 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 21740 fixed wireless providers. EarthLink offers 7 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 21740 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 7.3 Mbps.
Show all upload speeds
- 0.8% up to 30.0 Mbps
- 22.5% up to 20.0 Mbps
- 0.3% up to 15.0 Mbps
- 6.2% up to 10.0 Mbps
- 1.6% up to 5.0 Mbps
- 59.2% up to 3.0 Mbps
- 9.5% up to 1.0 Mbps
Verizon Fixed Wireless in 21740, MD
Verizon fixed wireless coverage
About 54.83%, or 34,824 people, have Verizon fixed wireless internet available to them in the zip. The company covers the entire 21740 area. Verizon is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of 21740.
Verizon fixed wireless download speeds
Verizon is below average when comparing download speeds to all other internet providers in 21740. Versus other fixed wireless providers in the area, Verizon fixed wireless is the fastest. There are no different maximum speeds throughout 21740. The fastest plan anyone in 21740 can order from Verizon goes up to 300 Mbps, and all 21740 customers can get this speed.
Show all download speeds
- 100.0% up to 300.0 Mbps
Verizon fixed wireless upload speeds
In 21740 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 21740 fixed wireless providers. Verizon offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 21740 is up to 20 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 20.0 Mbps
AT&T Fixed Wireless in 21740, MD
AT&T fixed wireless coverage
About 53.32%, or 33,867 people, have AT&T fixed wireless internet available to them in the zip. The company covers the entire 21740 area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of 21740.
AT&T fixed wireless download speeds
AT&T is below average when comparing download speeds to all other internet providers in 21740. Versus other fixed wireless providers in the area, AT&T fixed wireless is below average. There are 2 different maximum speeds throughout 21740. The fastest plan anyone in 21740 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 21740 customers is up to 39 Mbps.
Show all download speeds
- 19.0% up to 100.0 Mbps
- 81.0% up to 25.0 Mbps
AT&T fixed wireless upload speeds
In 21740 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 21740 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 21740 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 6.2 Mbps.
Show all upload speeds
- 19.0% up to 20.0 Mbps
- 81.0% up to 3.0 Mbps
One Ring Networks Fixed Wireless in 21740, MD
One Ring Networks fixed wireless coverage
About 17.99%, or 11,425 people, have One Ring Networks fixed wireless internet available to them in the zip. The company covers the entire 21740 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 21740.
One Ring Networks fixed wireless download speeds
One Ring Networks is below average when comparing download speeds to all other internet providers in 21740. Versus other fixed wireless providers in the area, One Ring Networks fixed wireless is below average. There are 7 different maximum speeds throughout 21740. The fastest plan anyone in 21740 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 21740 customers is up to 27 Mbps.
Show all download speeds
- 2.8% up to 100.0 Mbps
- 0.4% up to 80.0 Mbps
- 17.6% up to 50.0 Mbps
- 12.3% up to 40.0 Mbps
- 15.5% up to 30.0 Mbps
- 0.1% up to 25.0 Mbps
- 51.4% up to 10.0 Mbps
One Ring Networks fixed wireless upload speeds
In 21740 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 average compared to other 21740 fixed wireless providers. One Ring Networks offers 5 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 21740 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 7.5 Mbps.
Show all upload speeds
- 2.8% up to 30.0 Mbps
- 17.7% up to 20.0 Mbps
- 23.2% up to 10.0 Mbps
- 4.9% up to 5.0 Mbps
- 51.4% up to 1.0 Mbps
21740 Internet by Area
This information is most helpful to those looking for homes or considering moving to 21740 or any of the areas nearby.
How does internet in 21740 compare to the rest of Maryland?
Internet speeds in 21740 are comparable versus the average speeds in Maryland: 2,041 Mbps in Maryland versus 2,032 Mbps in the zip. The state has similar internet availability compared to the zip. Average internet coverage in Maryland is 98.96% versus 99.15% in 21740.
What zip codes have widespread internet?
Internet coverage varies by zip code and neighborhood. Some examples in or around 21740 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
- 21734, MD: more internet coverage, faster speeds
- 21742, MD: more internet coverage, slower speeds
- 21767, MD: more internet coverage, faster speeds
- 21795, MD: more internet coverage, slower speeds
- 21781, MD: more internet coverage, slower speeds
- 21746, MD: more internet coverage, slower speeds
- 21733, MD: more internet coverage, slower speeds
- 17263, PA: more internet coverage, slower speeds
- 21713, MD: more internet coverage, slower speeds
- 21783, MD: more internet coverage, slower speeds
Zip Codes with Similar Populations
- 93905, CA: more internet coverage, faster speeds
- 92562, CA: more internet coverage, faster speeds
- 33178, FL: less internet coverage, faster speeds
- 33027, FL: more internet coverage, faster speeds
- 92620, CA: more internet coverage, faster speeds
- 32822, FL: less internet coverage, faster speeds
- 32244, FL: more internet coverage, faster speeds
- 92630, CA: more internet coverage, faster speeds
- 92677, CA: more internet coverage, faster speeds
- 22554, VA: more internet coverage, slower speeds