CSI Speed Test

Maintained by:Carson WardData & methodology:Wes WardLast updated:{{date_modified_text}}January 31, 2026

Enter a zip code, city, or address below to see what speeds you can expect in your location for CSI and other ISPs.

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Jump to: Speed Benchmarks | Speed Reviews | CSI Availability

CSI Speed Benchmarks

Here’s how your result stacks up against CSI's benchmarks: fastest available speeds reach 150 Mbps down / 15 Mbps up. Across CSI’s footprint, typical available speeds average 150 Mbps down / 15 Mbps up.

CSI Internet by State

This map highlights CSI coverage and speeds by state, CSI has the biggest presence in North Dakota. Hover over each state to see CSI availability by connection type, and click on a state to see all providers in that state.

CSI Speed Reviews

CSI has an overall rating of 4.00 out of 5, with a total of 2 reviews and ratings across the United States. Speed ratings by service type include: Fiber: 4.00 stars, Cable: 4.00 stars, DSL: not been rated by customers yet, Fixed Wireless: not been rated by customers yet. If you'd like to tell others about your experience, you can rate or review CSI here.

Connection

Customer Rating

Fiber

1

Cable

1

For detailed reviews, visit our CSI Internet Reviews page.

Biggest Cities with CSI Internet Service

CSI is available in 3 cities throughout the country. Here is a list of the largest cities with CSI internet service: