Question re: Radio frequency allocation at IMS

Over the years, I have tried to have a scanner setup for the Indy500 and Indy Grand Prix. I have been baffled by the fact that frequency lists are frequently wrong.

Does anyone have any insight into the frequencies used by the teams, cars, race officials, IMS, and anyone else I'm forgetting? How are they assigned, why does nobody seem to know what they actually are?

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US Radio Spectrum Frequency Allocations
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United States Radio Frequency Allocation Chart imgur.com/gallery/03mZWjw
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amateur radio satellites Frequency
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πŸ“…︎ May 20 2021
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United States Radio Frequency Allocation Chart ntia.doc.gov/files/ntia/p…
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πŸ‘€︎ u/wonder-maker
πŸ“…︎ Nov 30 2018
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United States Radio Frequency Allocations... [5040 Γ— 3225]
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πŸ“…︎ Jun 10 2014
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πŸ“…︎ Sep 04 2021
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