In 21523 there is 1 residential Fiber provider covering 2.58% of the zip. The average home can get speeds up to 1,200 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 Fiber internet providers in 21523, MD.
To see availability maps for all providers including fiber, cable, DSL, and more in 21523, MD please click below.
Fiber Internet Service Provider in 21523
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 21523 are not shown.
21523 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 21523 is fiber internet available?
Fiber Internet Availability Key
Fiber is available in 2.58% of 21523. Areas in green have fiber 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 21523 above to see who has service at your home.
How fast is fiber internet in 21523?
The map below shows maximum fiber internet speeds by area in 21523.
Fiber Internet Speed Key
The average 21523 home can get up to 1,200 Mbps on their fiber internet plan. The fastest fiber download speed in the zip is 1,200 Mbps, which 2.58% of residents can get.
Is fiber the fastest internet I can get in 21523?
The fastest internet for you may vary based on where in 21523 you live. In general, cable competes most often with fiber in the zip.
- Fiber is the fastest internet type for 2.58% of 21523 homes.
- Cable is fastest for 97.42% 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 21523 homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in 21523, along with details on where in 21523 and at what speeds.
XFINITY from Comcast Fiber in 21523, MD
XFINITY fiber coverage
About 2.58%, or 7 people, have XFINITY fiber internet available to them in the zip. The company covers the northwest 21523 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 21523.
XFINITY from Comcast fiber download speeds
XFINITY is one of the fastest when comparing download speeds to all other internet providers in 21523. Versus other fiber providers in the area, XFINITY fiber is the fastest. There are no different maximum speeds throughout 21523. The fastest plan anyone in 21523 can order from XFINITY goes up to 1,200 Mbps, and all 21523 customers can get this speed.
Show all download speeds
- 100.0% up to 1,200.0 Mbps
XFINITY from Comcast fiber upload speeds
In 21523 download speeds tend to be faster than than upload speeds for XFINITY fiber. Compared to other ISPs, XFINITY is one of the fastest where upload speeds are concerned, and the fastest compared to other 21523 fiber providers. XFINITY offers no different upload speeds across the zip. The fastest upload speed available to anyone from this ISP in 21523 is up to 35 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 35.0 Mbps
21523 Fiber by Area
This information is most helpful to those looking for homes or considering moving to 21523 or any of the areas nearby.
How does fiber internet in 21523 compare to the rest of Maryland?
Fiber internet speeds in 21523 are much faster versus the average speeds in Maryland: 0.00 Mbps in Maryland versus 1,200 Mbps in the zip. The state has similar fiber availability compared to the zip. Average fiber coverage in Maryland is 0.00% versus 2.58% in 21523.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around 21523 are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does fiber 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
- 21562, MD: less fiber coverage, similar speeds
- 26726, WV: more fiber coverage, faster speeds
- 21561, MD: less fiber coverage, faster speeds
- 21539, MD: more fiber coverage, similar speeds
- 26743, WV: more fiber coverage, faster speeds
- 26710, WV: more fiber coverage, faster speeds
- 21541, MD: more fiber coverage, faster speeds
- 26719, WV: more fiber coverage, faster speeds
- 26753, WV: more fiber coverage, faster speeds
- 21550, MD: more fiber coverage, faster speeds
Zip Codes with Similar Populations
- 99791, AK: more fiber coverage, slower speeds
- 39359, MS: more fiber coverage, faster speeds
- 68014, NE: less fiber coverage, slower speeds
- 57467, SD: more fiber coverage, slower speeds
- 13846, NY: more fiber coverage, slower speeds
- 13806, NY: more fiber coverage, slower speeds
- 98819, WA: more fiber coverage, slower speeds
- 12416, NY: more fiber coverage, slower speeds
- 11947, NY: more fiber coverage, faster speeds
- 11770, NY: more fiber coverage, faster speeds