Click the map to select a position When you select a point on the map a Spectrum Inquiry calculation request is submitted to the Key Bridge Spectrum Access System (SAS), which then evaluates the maximum available transmit power for a "type-standard" hypothetical transmitter on all available CBRS channels.

There are many influences CBRS spectrum availability is influenced by different priority tiers and types of incumbent or protected users. A priority user's influence on spectrum availability is highly dependent upon their policy profile and technical configuration, which are evaluated for all channels in the request by the Key Bridge SAS.

A channel may be reduced or blocked Priority user influence on a channel can either reduce the maximum available power of your transmission or disallow your transmission entirely. These are shown in the table with a block or an influence icon to to help you better understand spectrum availability.

This is an estimate This resource provides an estimate of available CBRS spectrum anywhere in the United States. The response is an estimate because the answer is calculated for a hypothetical transmitter configuration.

Your radios get a "true" answer A true response is produced for your subscribed radios, which send Spectrum Inquiry calculation requests via a dedicated machine-to-machine interface with the Key Bridge Spectrum Access System. This is because the Key Bridge SAS can calculate a precise solution with your radio's complete registration configuration.