FCC Broadband Data Collection, Dec 2024 vintage, residential filings — broadbandmap.fcc.gov. Availability is address-specific within each ZIP.
Check your Charleston, SC ZIP code against the same FCC filings:
Call (833) 390-3014Internet providers in Charleston, SC by ZIP coverage
Of the 15 residential providers in the filings for Charleston, SC, the six below reach the most of its nine ZIP codes by wire, 5G or fixed wireless.
| Provider | Technology | ZIPs served (of 9) | Top filed speed |
|---|---|---|---|
| Home Telecom | Fiber | 9 | 5 Gbps |
| Xfinity | Cable + Fiber | 9 | 5 Gbps |
| WOW! | Cable + Fiber | 9 | 1.2 Gbps |
| AT&T Internet Air | 5G Home | 9 | 100 Mbps |
| T-Mobile Home Internet | 5G Home | 9 | 100 Mbps |
| AT&T Fiber | Fiber | 8 | 5 Gbps |
5G home coverage is ZIP-wide here: AT&T Internet Air and T-Mobile Home Internet both file in every one of the nine ZIP codes. Satellite (Starlink, Viasat, HughesNet) isn’t ranked because it covers every Charleston, SC address.
At the ZIP level, Charleston, SC has at least three wired networks everywhere — Home Telecom, Xfinity, and WOW!. Multi-gig service (2 Gbps and up) is on file from Home Telecom (5 Gbps), Xfinity (5 Gbps), and AT&T Fiber (5 Gbps). 8 Gbps is the top speed on file in Charleston, SC, and it belongs to a provider outside this table — one that reaches fewer ZIP codes than any network listed.