Best Internet Providers in Duncan, SC
All 6 providers, ranked by coverage, speed and customer ratings
Find internet availability by address in Duncan, SC
Duncan has 6 internet service providers, they are sorted by coverage, available speed, and customer rating from our unbiased internet provider report. Fiber, Cable, DSL, and Fixed Wireless internet are available in the city. Reviews are grouped by provider and the type of service they offer, covering all 4 available internet technologies in Duncan.
Ranks compare Duncan with the 3,338 US towns of 10,000 to 24,999 people, the tiers of our fastest-cities rankings.
The Best Internet in Duncan, SC at a Glance
Duncan Internet Providers, Ranked by Coverage, Speed and Customer Ratings
Spectrum
Connection
Customer Rating
Fiber
Cable
EarthLink
Connection
Customer Rating
Fiber
DSL
Fixed Wireless
AT&T
Connection
Customer Rating
Fiber
DSL
Fixed Wireless
Verizon
Connection
Customer Rating
Fixed Wireless
Providers with less than 1% coverage in this city are excluded from the list. To see if one of these providers is available at your home, please use the address search above.
Speed and technology may vary by address for all providers. Please note we may have a financial relationship with some of the providers above, which does not impact the customer ratings displayed. Customer ratings listed above are national ratings, local Duncan ratings may vary and are shown below.
Who is the Best Internet Provider in Duncan, SC?
Verizon is the highest-rated internet provider in Duncan based on 95 South Carolina customer reviews, and T-Mobile Home Internet has the highest rating nationwide. The provider information above and the information immediately below can help you decide. Compare provider ratings and review counts above.
or call 1-833-213-7018
Which Providers are Available at my Home in Duncan?
Coverage changes block by block. Pick a provider and a technology to see where its service reaches: the darker the area, the larger the share of homes it covers. For your exact address, use the address search above.
Coverage map for each provider in Duncan
- AT&T - fiber coverage map
- EarthLink - fiber coverage map
- Lumos Networks - fiber coverage map
- Spectrum - cable coverage map
- Spectrum - fiber coverage map
- Verizon - fixed wireless coverage map
- AT&T - dsl coverage map
- EarthLink - dsl coverage map
- AT&T - fixed wireless coverage map
- EarthLink - fixed wireless coverage map
- T-Mobile Home Internet - fixed wireless coverage map
How Duncan Compares to Places Its Size
Duncan's report card score is in the top 34% and its connectivity index is in the top 47%.
| Measure | Duncan | Rank among US towns of 10,000 to 24,999 people | Spartanburg County | South Carolina | US | Leader |
|---|---|---|---|---|---|---|
| ISP Report Card inputs: what providers offer here | ||||||
| Fiber availability | 72.3% | bottom 41% | 72.8% | 75.7% | 71.5% | 115 places at 100.0% |
| Average top speed | 3,684 Mbps | top 35% | 3,161 Mbps | 3,370 Mbps | 3,486 Mbps | Middle Valley, TN and Red Bank, TN and 1 more (25,000 Mbps) |
| Providers at a typical address | 8.6 | top 12% | 7.6 | 6.9 | 7.1 | Joshua, TX (13.3) |
| Connectivity index inputs: how much households need and use the internet | ||||||
| People per household | 2.6 | top 41% | 2.6 | 2.5 | 2.7 | North Bay Shore, NY (4.7) |
| Workers who work from home | 10% | bottom 39% | 9% | 12% | 15% | Brambleton, VA (51%) |
| Homes with a computer, tablet or phone | 98% | top 14% | 94% | 95% | 96% | 86 places at 100% |
| Homes with internet | 91% | bottom 44% | 89% | 89% | 91% | 11 places at 100% |
| Homes on fiber, cable or DSL | 77% | bottom 49% | 72% | 73% | 76% | Klahanie, WA and Short Hills, NJ and 1 more (96%) |
| More about the households here | ||||||
| Homes with a desktop or laptop | 82% | top 49% | 74% | 77% | 81% | Stone Ridge, VA and West University Place, TX and 1 more (100%) |
| Median household income | $81,661 | bottom 45% | $72,333 | $77,367 | $93,246 | West University Place, TX ($249,707) |
| Residents in school (6th grade to college) | 15% | top 37% | 15% | 15% | 16% | Stanford, CA (84%) |
Fiber reaches 72.3% of homes in Duncan, against 72.8% across Spartanburg County and 75.7% across South Carolina. Households in Duncan are smaller than the US average (2.6 people against 2.7); 10% of workers work from home (US 15%); and the median household income is $81,661 (US $93,246).
Our demographic data is sourced from the latest 5-year release of the American Community Survey by the US Census Bureau.
Fiber, 5G, Cable and DSL Internet in Duncan
Which Fiber Internet Providers are Available in Duncan?
EarthLink Fiber in Duncan, SC
Availability:
69.2%
Customer Rating:
(6)
Avg. Download Speed
4,726 Mbps
EarthLink offers Fiber service to 69.2% of Duncan homes. Across the city, EarthLink Fiber has speeds up to 4,726 Mbps, with speeds from 1,000 Mpbs up to 5,000 Mbps depending on the address. Upload speeds are symmetrical, meaning they are exactly the same as download speeds for EarthLink Fiber. EarthLink Fiber is rated about the same as other types of internet service available in Duncan from EarthLink in terms of customer satisfaction.
AT&T Fiber in Duncan, SC
Availability:
69.2%
Customer Rating:
(542)
Avg. Download Speed
4,726 Mbps
AT&T offers Fiber service to 69.2% of Duncan homes. Across the city, AT&T Fiber has speeds up to 4,726 Mbps, with speeds from 1,000 Mpbs up to 5,000 Mbps depending on the address. Upload speeds are symmetrical, meaning they are exactly the same as download speeds for AT&T Fiber. AT&T Fiber is rated lower than other types of internet service available in Duncan from AT&T in terms of customer satisfaction.
Spectrum Fiber in Duncan, SC
Availability:
28.9%
Customer Rating:
(207)
Avg. Download Speed
1,000 Mbps
Spectrum offers Fiber service to 28.9% of Duncan homes. Across the city, Spectrum Fiber has speeds up to 1,000 Mbps
Lumos Networks Fiber in Duncan, SC
Availability:
22.1%
Customer Rating:
(27)
Avg. Download Speed
5,000 Mbps
Lumos Networks offers Fiber service to 22.1% of Duncan homes. Across the city, Lumos Networks Fiber is the only type of service available from the company, with speeds up to 5,000 Mbps
Which Fixed Wireless and LTE Internet Providers are Available in Duncan?
Verizon Fixed Wireless in Duncan, SC
Availability:
97.1%
Customer Rating:
(362)
Avg. Download Speed
261 Mbps
Verizon offers Fixed Wireless service to 97.1% of Duncan homes. Across the city, Verizon Fixed Wireless is the only type of service available from the company, with speeds up to 261 Mbps, with speeds from 25 Mpbs up to 300 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 6.0 and as high as 20, with an average of 18 Mbps throughout the city.
T-Mobile Home Internet Fixed Wireless in Duncan, SC
Availability:
96.7%
Customer Rating:
(342)
Avg. Download Speed
51 Mbps
T-Mobile Home Internet offers Fixed Wireless service to 96.7% of Duncan homes. Across the city, T-Mobile Home Internet Fixed Wireless is the only type of service available from the company, with speeds up to 51 Mbps, with speeds from 25 Mpbs up to 100 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 3.0 and as high as 20, with an average of 8.9 Mbps throughout the city.
EarthLink Fixed Wireless in Duncan, SC
Availability:
94.7%
Customer Rating:
(4)
Avg. Download Speed
56 Mbps
EarthLink offers Fixed Wireless service to 94.7% of Duncan homes. Across the city, EarthLink Fixed Wireless has speeds up to 56 Mbps, with speeds from 25 Mpbs up to 100 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 3.0 and as high as 20, with an average of 10 Mbps throughout the city.
AT&T Fixed Wireless in Duncan, SC
Availability:
94.7%
Customer Rating:
(205)
Avg. Download Speed
56 Mbps
AT&T offers Fixed Wireless service to 94.7% of Duncan homes. Across the city, AT&T Fixed Wireless has speeds up to 56 Mbps, with speeds from 25 Mpbs up to 100 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 3.0 and as high as 20, with an average of 10 Mbps throughout the city.
Which Cable Internet Providers are Available in Duncan?
Spectrum Cable in Duncan, SC
Availability:
97.4%
Customer Rating:
(1739)
Avg. Download Speed
1,000 Mbps
Spectrum offers Cable service to 97.4% of Duncan homes. Across the city, Spectrum Cable has speeds up to 1,000 Mbps
Which DSL Internet Providers are Available in Duncan?
EarthLink DSL in Duncan, SC
Availability:
83.0%
Customer Rating:
(5)
Avg. Download Speed
76 Mbps
EarthLink offers DSL service to 83.0% of Duncan homes. Across the city, EarthLink DSL has speeds up to 76 Mbps, with speeds from 10 Mpbs up to 100 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 1.0 and as high as 20, with an average of 16 Mbps throughout the city. EarthLink DSL is rated higher than other types of internet service available in Duncan from EarthLink in terms of customer satisfaction.
AT&T DSL in Duncan, SC
Availability:
83.0%
Customer Rating:
(304)
Avg. Download Speed
76 Mbps
AT&T offers DSL service to 83.0% of Duncan homes. Across the city, AT&T DSL has speeds up to 76 Mbps, with speeds from 10 Mpbs up to 100 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 1.0 and as high as 20, with an average of 16 Mbps throughout the city. AT&T DSL is rated about the same as other types of internet service available in Duncan from AT&T in terms of customer satisfaction.
Internet in Duncan by Neighborhood and ZIP Code
Duncan has 1 ZIP code with its own page. Each row links to that place’s page.
Neighborhoods in Duncan
| Neighborhood | People | Homes with fiber | Average top speed | Providers at a typical address | Report card | Connectivity |
|---|
ZIP codes in Duncan
| ZIP code | People | Homes with fiber | Average top speed | Providers at a typical address | Report card | Connectivity |
|---|---|---|---|---|---|---|
| 29334 | 16,439 | 72.8% | 3,742 Mbps | 8.6 | B+ | 68/100 |
How Duncan Compares to Nearby Places
The 10 places nearest to Duncan that have their own pages are all within 9 miles. Among them, Reidville has the most homes with fiber (93.9%) and Startex the fewest (11.1%); Duncan has 72.3%.
| Place | People | Homes with fiber | Average top speed | Providers at a typical address | Report card | Connectivity |
|---|---|---|---|---|---|---|
| Duncan (this page) | 14,831 | 72.3% | 3,684 Mbps | 8.6 | B+ | 68/100 |
| Greer | 86,827 | 85.7% | 4,155 Mbps | 8.6 | B+ | 77/100 |
| Five Forks | 17,737 | 89.8% | 3,824 Mbps | 8.9 | A- | 85/100 |
| Moore | 15,995 | 93.0% | 4,570 Mbps | 9 | A- | 75/100 |
| Lyman | 13,782 | 64.4% | 2,949 Mbps | 7.9 | B | 70/100 |
| Wellford | 11,659 | 83.6% | 4,008 Mbps | 8 | B+ | 66/100 |
| Reidville | 2,902 | 93.9% | 2,980 Mbps | 8.1 | A- | 81/100 |
| Startex | 1,008 | 11.1% | 1,468 Mbps | 6.5 | C | 69/100 |
| Arcadia | 511 | 72.8% | 3,912 Mbps | 7 | B | 45/100 |
| Crescent | 408 | 100.0% | 5,779 Mbps | 6.7 | A- | 49/100 |
| Poplar Springs | 116 | 100.0% | 2,828 Mbps | 9 | A | 75/100 |
Who is the Fastest Internet Provider in Duncan?
According to unbiased feedback from real internet customers, they reported being happiest with speeds provided by T-Mobile Home Internet. On the other hand, based on data provided by the internet providers to the FCC, AT&T and EarthLink should have faster speeds at a local level. While we typically put more weight on real-world customer ratings, we display both satisfaction and technical maximum information for customers to decide for themselves.
Data Reported to FCC by ISPs: Average Maximum Available in Duncan
| AT&T | 5,000 |
|---|---|
| EarthLink | 5,000 |
| Lumos Networks | 5,000 |
| Spectrum | 1,000 |
| Verizon | 300 |
| Viasat | 100 |
| T-Mobile Home Internet | 100 |
| HughesNet | 25 |
How fast is your internet?
Test your connection here and see it next to the speeds providers advertise in Duncan. It takes about 20 seconds and, on a fast line, can move a few hundred MB of data.
Customer Ratings for Duncan Internet Providers
Based on 95 reviews from South Carolina internet customers, Verizon is the best internet service provider for Duncan residents. Verizon was rated at an average of 4.36 out of 5 in our report for overall customer satisfaction. EarthLink wins for second-place in South Carolina, with 5.00 out of 5 stars and 97.6% coverage in Duncan.
At a national level, based on 4201 national reviews for any of the providers listed above, T-Mobile Home Internet is rated higher than any other provider, with a rating of 4.02 out of 5.
Local, State, and National Ratings for all Duncan Internet Providers
The table below shows average customer ratings from customers in Duncan, South Carolina, and customers throughout the country.
| ISP / Tech Type | Duncan Overall | South Carolina Overall | National Overall | For Service | ||
|---|---|---|---|---|---|---|
| Verizon |  (0) |  (11) | (816) | View Plans | ||
| T-Mobile Home Internet | (0) | (5) | (342) | View Plans | ||
| EarthLink | (0) |  (1) | (15) | View Plans | ||
| Lumos Networks | (0) | (1) | (28) | View Plans | ||
| AT&T | (0) | (22) | (1051) | View Plans | ||
| Spectrum | (0) | (55) | (1949) | View Plans | ||
| HughesNet | (0) | (0) |  (25) | View Plans | ||
| Viasat | (0) | (0) |  (12) | View Plans |
Customer Ratings for Internet Provider Speeds in Duncan
Based on data reported by Duncan ISPs to the FCC, the fastest speeds in the city are available through AT&T and EarthLink. These internet providers offer speeds up to 5,000 Mbps in Duncan. Therefore, the average customer can get up to 3,373 Mbps if they’re willing to purchase the fastest subscription tier available at their homes.
However, actual customers rated their satisfaction with internet speed highest with T-Mobile Home Internet. This indicates T-Mobile Home Internet reliably delivers speeds expected by the customer based on the plan they are paying for.
| ISP / Tech Type | Duncan Speed | South Carolina Speed | National Speed | For Service | ||
|---|---|---|---|---|---|---|
| T-Mobile Home Internet | (0) | (5) | (342) | View Plans | ||
| Verizon | (0) | (11) | (816) | View Plans | ||
| EarthLink | (0) | (1) | (15) | View Plans | ||
| Spectrum | (0) | (55) | (1949) | View Plans | ||
| Lumos Networks | (0) | (1) | (28) | View Plans | ||
| AT&T | (0) | (22) | (1051) | View Plans | ||
| HughesNet | (0) | (0) | (25) | View Plans | ||
| Viasat | (0) | (0) | (12) | View Plans |
Who is the Cheapest Internet Provider in Duncan?
Of the providers in Duncan, customers rate T-Mobile Home Internet the best for price. Data comes from customers rating their satisfaction with pricing: in Duncan where enough of them have reviewed a provider, otherwise across South Carolina or the country. This feedback is valuable because it considers price changes and whether the speeds paid for are worth it.
T-Mobile Home Internet is rated 4.00 out of 5 for price, which is higher than the average across all internet providers in the country. EarthLink is rated second for affordability, with an average price rating of 4.00 out of 5.
The table below shows how customers in Duncan, South Carolina, and the United States rated the affordability of their internet service.
Rated Affordability in Duncan
| ISP / Tech Type | Duncan Affordability | South Carolina Affordability | National Affordability | For Service | ||
|---|---|---|---|---|---|---|
| T-Mobile Home Internet | (0) | (5) | (342) | View Plans | ||
| Verizon | (0) | (11) | (816) | View Plans | ||
| EarthLink | (0) | (1) | (15) | View Plans | ||
| Lumos Networks | (0) | (1) | (28) | View Plans | ||
| AT&T | (0) | (22) | (1051) | View Plans | ||
| Spectrum | (0) | (55) | (1949) | View Plans | ||
| HughesNet | (0) | (0) | (25) | View Plans | ||
| Viasat | (0) | (0) | (12) | View Plans |
Customer Reviews for Internet Service Providers in South Carolina
Customer Reviews
Greg M.
CarolinaConnect Fiber
November 13, 2026 Rudest supervisor is Christy. We were told we had to use our previous equipment at our new address in the same zip code but only a soft start was needed because the previous owners of that residence, but Customer service and Christy said no. Said we must talk with Tech support. They said no. So, we'd have to schedule a date and wait hours for someone to show. Meanwhile I work from home and need the Internet to work. Christy then says IT can do it tomorrow at 8AM, but I have a 9 AM meeting I must make. She won't give us IT's number to arrange a better time, so we say we will have to look at other options. She then calls back wanting to cancel our current service now. Can you believe how rude and petty this woman is. We can't have another appointment for a soft start or new equipment installed at the new residence, so I can at least continue working in the meantime. If you treat all your customers this way. You deserve no customers.
ISPReports User
CarolinaConnect Fiber
August 14, 2026 not as good as 1 year ago. Has slowed down a bunch. Thinking about changing service
William
Comporium Cable
July 25, 2026 It goes out often. The router typically has to be reset multiple times and there are no other options available.
ISPReports User
Ripple Fiber
July 22, 2026 Several outages lately. It was down today but it is running slow. I put in a ticket and the speed of the response will determine wether I go back to Spectrum or not.
Lataysia R.
XFINITY Cable
June 12, 2026 The price of my family’s internet connection is really cheap. It is around $20 per month and we have been with this provider for at least 10 years. However, there has been a decline in the presence of this company and they appear to be losing lots of customers. There is always some WiFi connection issue almost everyday, but it is minor. My phone may lose connection but my MacBook, iPad, and TV is still connected. Overall, for the price and in comparison to other WiFi providers, I am overall satisfied with my internet.
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Which ISP Should You Choose in Duncan?
The right ISP for you depends upon your needs, but in general we can make the following suggestions:
- The best all-around internet service provider in Duncan is Verizon.
- The fastest internet provider should be AT&T and EarthLink. Considering speed for the money and reliability in speeds, T-Mobile Home Internet may be a better choice based on real-world local customer feedback.
- The most affordable internet provider in Duncan is T-Mobile Home Internet.
- Viasat, HughesNet, EarthLink, and AT&T has the broadest coverage in Duncan, available to 97.6% of homes, and is most likely to cover your home. To find out exactly what’s available at your home, please use our address search tool.