Home Reports 2025 Global United States California

Internet Speed Report California September 2025

A comprehensive analysis of broadband performance in California based on real user speed tests conducted on Bandwidth Place.

Total Tests

792

Avg. Download

371.21Mbps

Avg. Upload

124.22Mbps

Avg. Ping

35.5ms

Top Internet Providers

Provider Avg Speed
Charter Communications 300.8 Mbps
Comcast Cable Communications 409.3 Mbps
Charter Communications 356.3 Mbps
Comcast Cable Communications 414.7 Mbps
Comcast Cable Communications, LLC 338.9 Mbps
Cox Communications Inc. 296.6 Mbps
Comcast Cable Communications, LLC 587.4 Mbps
Charter Communications 316.1 Mbps
Charter Communications 439.8 Mbps
Comcast Cable Communications, LLC 276.3 Mbps

Top Devices

Device Share
iPhone 10.9%
iPhone 6.8%
iPhone 4.5%
Generic Smartphone 2.0%
iPhone 1.8%
iPhone 1.5%

Top Browsers

Browser Share
Chrome 25.1%
Mobile Safari 10.9%
Chrome 7.8%
Mobile Safari 6.8%
Chrome 5.1%
Mobile Safari 4.5%
Firefox 3.9%
Chrome 3.7%
Safari 3.5%
Chrome Mobile 2.0%

Analysis Methodology

The data presented in this report is aggregated directly from real user speed tests performed on the Bandwidth Place platform testing network nodes globally during 2025. We calculate the localized metrics using strict data sanity checks to prevent skewed results from anomalies or extreme outliers.

SEO & Location Routing Structure: Because location data is structurally rigid, caching data dynamically to static hierarchy (Country -> State -> City) provides significant improvements to PageSpeed metrics and Time to First Byte (TTFB). This strategy ensures optimum indexing for search engines processing localized queries.