Best Internet in Charleston, SC
1000 Mbps avg · 26 ZIP codes · 100% fiber · 10 providers/ZIP
Internet Providers in Charleston
| Provider | ZIP Codes Served | % of Area |
|---|---|---|
| Charter Communications INC | 26 | 100% |
| At&T South Carolina | 26 | 100% |
| T-Mobile | 26 | 100% |
| Comcast | 26 | 100% |
| Frontier Communication of the Carolinas South Carolina Gte | 26 | 100% |
| Farmers Telephone Cooperative INC | 26 | 100% |
ZIP Codes in Charleston
See how your connection compares to the 1000 Mbps average in Charleston.
Frequently Asked Questions
What is the average internet speed in Charleston, SC?
Charleston, South Carolina has an average maximum download speed of 1000 Mbps across 26 ZIP codes. The fastest available speed is 1000 Mbps. 100% of ZIP codes have fiber internet.
Who are the best internet providers in Charleston?
The most widely available providers in Charleston are Charter Communications INC (26 ZIPs), At&T South Carolina (26 ZIPs), T-Mobile (26 ZIPs). Check individual ZIP codes for exact availability at your address.
Is fiber internet available in Charleston?
Yes, fiber internet is available in 100% of Charleston's ZIP codes. Fiber coverage is good in this area. Search your specific ZIP code for exact fiber availability.
How does Charleston compare to the rest of South Carolina?
Charleston has an average Broadband Grade of A (80/100). The Charleston area averages 10 providers per ZIP code with 100% fiber access. Check the South Carolina overview for statewide comparison.
this entity is one of the data points covered by this site’s U.S. internet availability and broadband speed dataset. The detail above comes directly from the FCC Broadband Data Collection (BDC); the context that follows situates the headline numbers against the broader distribution across U.S. ZIPs, counties, and states.
The methodology behind every numeric value on this page is publicly documented on the the FCC Broadband Data Collection (BDC) portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for this entity is typically a peer within U.S. ZIPs, counties, and states with similar size, similar exposure, or similar geography — not the national-level summary alone.
Source: FCC Broadband Data Collection, 2026.