Internet Speed Test in South Carolina

Internet Providers in South Carolina

The main broadband providers serving South Carolina are AT&T Fiber, Spectrum, and Brightspeed. Coverage quality varies significantly depending on whether you are in an urban center or a rural area.

Fiber Internet in South Carolina

Charleston, Columbia, Greenville, and Myrtle Beach have the strongest fiber coverage. AT&T Fiber is expanding in South Carolina's major metros. Spectrum cable covers most of the state. Rural South Carolina, particularly the Pee Dee region, has significant broadband gaps.

What Speeds to Expect in South Carolina

Typical speeds for South Carolina residents: 200–1000 Mbps on cable or fiber plans. Testing on Ethernet gives you a true baseline—Wi-Fi performance varies by distance from the router and interference from neighboring networks.

• Best speeds: Fiber connections in metro areas—consistent performance with symmetric upload and download
• Cable speeds: Fast download but lower upload; can slow during evening peak hours on shared networks
• Rural speeds: DSL or fixed wireless typically deliver 25–100 Mbps; satellite (Starlink) is an option where wired service is unavailable

Speed Test Tips for South Carolina Residents

• Test on Ethernet to measure your true connection speed, not Wi-Fi overhead
• Run tests at both off-peak (morning) and peak (evening 7–10 PM) times—cable networks often show 20–40% lower speeds at peak hours
• Check upload speed separately—upload is the bottleneck for video calls and cloud uploads, not just download
• If your measured speed is consistently below 80% of your plan speed, contact your ISP or check for modem/router firmware updates

Frequently Asked Questions

What internet providers serve South Carolina?

AT&T Fiber covers parts of Charleston, Columbia, and Greenville. Spectrum cable is the most widely available provider statewide. Brightspeed serves some smaller markets. Rural SC relies on DSL or fixed wireless.

Is fiber available in South Carolina?

AT&T Fiber is available in parts of Charleston, Columbia, and Greenville. Brightspeed is expanding fiber in some SC markets. Most of rural South Carolina still uses cable or DSL.

What speeds can South Carolina residents expect?

Major city residents get 300–1000 Mbps via fiber or cable. Rural SC averages 50–200 Mbps. South Carolina ranks near the national average for broadband access.

How is South Carolina addressing rural broadband?

South Carolina received significant BEAD and e-Connectivity funding for rural deployment. Electric cooperatives in SC have been active in building fiber to rural members, particularly in the Pee Dee and Midlands regions.