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Castle Rock has 12 internet options – View all▼
Castle Rock has one fiber provider, Astound , and one cable provider, Xfinity. Symmetric speeds of 2,000 Mbps are available in parts of the city.
| Provider | DownDownload (Mbps) | UpUpload (Mbps) | AvailabilityCoverage |
|---|---|---|---|
| Astound | 2,000 | 2,000 | 86% |
| Provider | DownDownload (Mbps) | UpUpload (Mbps) | AvailabilityCoverage |
|---|---|---|---|
| Xfinity | 1,200 | 35 | 99% |
| Provider | DownDownload (Mbps) | UpUpload (Mbps) | AvailabilityCoverage |
|---|---|---|---|
| Astound | 1,000 | 10 | 7% |
| CenturyLink | 60 | 5 | 100% |
| Provider | DownDownload (Mbps) | UpUpload (Mbps) | AvailabilityCoverage |
|---|---|---|---|
| Verizon | 300 | 20 | 99% |
| MINTernet | 100 | 20 | 99% |
| T-Mobile | 100 | 20 | 99% |
| AT&T | 25 | 3 | 100% |
| US Cellular | 25 | 3 | 99% |
| Provider | DownDownload (Mbps) | UpUpload (Mbps) | AvailabilityCoverage |
|---|---|---|---|
| Starlink | 280 | 30 | 100% |
| Provider | DownDownload (Mbps) | UpUpload (Mbps) | AvailabilityCoverage |
|---|---|---|---|
| Viasat | 100 | 3 | 100% |
| HughesNet | 50 | 5 | 100% |
Broadband Map's availability estimates are based on the census boundaries of Castle Rock. Speed metrics capture internet providers' maximum advertised speeds. Both may be overoptimistic.
Broadband Map's listings of internet providers in Castle Rock rely primarily on the November 2025 release from the FCC's Broadband Data Collection program (representing Castle Rock ISPs' availability as of June 2025).