In Duncan there are 3 residential Fiber providers covering 69.93% of the city. The average home can get speeds up to 4,688 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 Duncan, SC.
To see availability maps for all providers including fiber, cable, DSL, and more in Duncan, SC please click below.
Fiber Internet Service Providers in Duncan
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 Duncan are not shown.
Duncan 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 Duncan is fiber internet available?
Fiber Internet Availability Key
Fiber is available in 69.93% of Duncan. Areas in green have fiber internet service, where areas in yellow or red may not. The most widely available provider is AT&T. Call one of the companies with service in Duncan above to see who has service at your home.
How fast is fiber internet in Duncan?
The map below shows maximum fiber internet speeds by area in Duncan.
Fiber Internet Speed Key
The average Duncan home can get up to 4,688 Mbps on their fiber internet plan. The fastest fiber download speed in the city is 5,000 Mbps, which 64.47% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 5.45% 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 Duncan.
Fiber internet speeds tend to be faster in the southwest parts of Duncan, and slower in the central areas of the city.
Is fiber the fastest internet I can get in Duncan?
The fastest internet for you may vary based on where in Duncan you live. In general, cable competes most often with fiber in the city.
- Fiber is the fastest internet type for 69.93% of Duncan homes.
- Cable is fastest for 27.51% of the city.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for less than 1%.
- Satellite internet may be the only option for 2.33% of Duncan homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in Duncan, along with details on where in Duncan and at what speeds.
EarthLink Fiber in Duncan, SC
EarthLink fiber coverage
About 69.21%, or 10,264 people, have EarthLink fiber internet available to them in the city. The company covers the southeast, south, northwest, north, southwest, central, east, and west Duncan area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in much of Duncan.
EarthLink fiber download speeds
EarthLink is above average when comparing download speeds to all other internet providers in Duncan. Versus other fiber providers in the area, EarthLink fiber is above average. There are 2 different maximum speeds throughout Duncan. The fastest plan anyone in Duncan can order from EarthLink goes up to 5,000 Mbps, the slowest package only goes up to 1,000 Mbps, and the city-wide average maximum speed for Duncan customers is up to 4,726 Mbps.
Show all download speeds
- 93.2% up to 5,000.0 Mbps
- 6.8% up to 1,000.0 Mbps
EarthLink fiber upload speeds
In Duncan download speeds tend to be equal to than upload speeds for EarthLink fiber. Compared to other ISPs, EarthLink is above average where upload speeds are concerned, and above average compared to other Duncan fiber providers. EarthLink offers 2 different upload speeds across the city, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Duncan is up to 5,000 Mbps. Some customers have slower plan choices, which only go up to 1,000 Mbps. On average, EarthLink customers can get speeds up to 4,726 Mbps.
Show all upload speeds
- 93.2% up to 5,000.0 Mbps
- 6.8% up to 1,000.0 Mbps
AT&T Fiber in Duncan, SC
AT&T fiber coverage
About 69.21%, or 10,264 people, have AT&T fiber internet available to them in the city. The company covers the southeast, south, northwest, north, southwest, central, east, and west Duncan area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in much of Duncan.
AT&T fiber download speeds
AT&T is above average when comparing download speeds to all other internet providers in Duncan. Versus other fiber providers in the area, AT&T fiber is above average. There are 2 different maximum speeds throughout Duncan. The fastest plan anyone in Duncan can order from AT&T goes up to 5,000 Mbps, the slowest package only goes up to 1,000 Mbps, and the city-wide average maximum speed for Duncan customers is up to 4,726 Mbps.
Show all download speeds
- 93.2% up to 5,000.0 Mbps
- 6.8% up to 1,000.0 Mbps
AT&T fiber upload speeds
In Duncan download speeds tend to be equal to than upload speeds for AT&T fiber. Compared to other ISPs, AT&T is above average where upload speeds are concerned, and above average compared to other Duncan fiber providers. AT&T offers 2 different upload speeds across the city, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Duncan is up to 5,000 Mbps. Some customers have slower plan choices, which only go up to 1,000 Mbps. On average, AT&T customers can get speeds up to 4,726 Mbps.
Show all upload speeds
- 93.2% up to 5,000.0 Mbps
- 6.8% up to 1,000.0 Mbps
Spectrum Fiber in Duncan, SC
Spectrum fiber coverage
About 1.47%, or 218 people, have Spectrum fiber internet available to them in the city. The company covers the north, northwest, and south Duncan area. Spectrum is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of Duncan.
Spectrum fiber download speeds
Spectrum is below average when comparing download speeds to all other internet providers in Duncan. Versus other fiber providers in the area, Spectrum fiber is the slowest. There are no different maximum speeds throughout Duncan. The fastest plan anyone in Duncan can order from Spectrum goes up to 1,000 Mbps, and all Duncan customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Spectrum fiber upload speeds
In Duncan download speeds tend to be faster than than upload speeds for Spectrum fiber. Compared to other ISPs, Spectrum is below average where upload speeds are concerned, and the slowest compared to other Duncan fiber providers. Spectrum offers 2 different upload speeds across the city, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Duncan is up to 500 Mbps. Some customers have slower plan choices, which only go up to 35 Mbps. On average, Spectrum customers can get speeds up to 63 Mbps.
Show all upload speeds
- 6.0% up to 500.0 Mbps
- 94.0% up to 35.0 Mbps
Duncan Fiber by Area
This information is most helpful to those looking for homes or considering moving to Duncan or any of the areas nearby.
How does fiber internet in Duncan compare to the rest of South Carolina?
Fiber internet speeds in Duncan are much faster versus the average speeds in South Carolina: 0.00 Mbps in South Carolina versus 4,688 Mbps in the city. The state has similar fiber availability compared to the city. Average fiber coverage in South Carolina is 0.00% versus 69.93% in Duncan.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around Duncan 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 cities?
Below are cities nearby and with similar populations. This comparison can be useful if living somewhere with fast internet is important to you.
Nearby Cities
- Reidville, SC: less fiber coverage, faster speeds
- Wellford, SC: less fiber coverage, slower speeds
- Poplar Springs, SC: more fiber coverage, slower speeds
- Lyman, SC: less fiber coverage, slower speeds
- Moore, SC: more fiber coverage, faster speeds
- Greer, SC: more fiber coverage, faster speeds
- Arcadia, SC: more fiber coverage, faster speeds
- Five Forks, SC: more fiber coverage, slower speeds
- Saxon, SC: less fiber coverage, faster speeds
- Southern Shops, SC: less fiber coverage, slower speeds
Cities with Similar Populations
- Huntingdon, PA: less fiber coverage, slower speeds
- Kettering, MD: more fiber coverage, slower speeds
- Kendallville, IN: less fiber coverage, faster speeds
- Kemp Mill, MD: more fiber coverage, slower speeds
- Kearney, MO: more fiber coverage, slower speeds
- Keansburg, NJ: more fiber coverage, faster speeds
- Jennings, LA: less fiber coverage, faster speeds
- Indialantic, FL: more fiber coverage, slower speeds
- Key Largo, FL: more fiber coverage, faster speeds
- Hopatcong, NJ: more fiber coverage, faster speeds