27.165 MHz
Channel 17 is used by many truckers running north–south interstates, a regional counterpart to Channel 19's east–west convention. It varies by area — listen before assuming.
Like all AM CB channels, the legal power limit here is 4 watts, and no license is required to transmit.
All 40 CB channels are fixed nationwide by the FCC between 26.965 and 27.405 MHz. Channel uses like the ones described here are widely-observed operator conventions, not law — the frequency is fixed, but who's talking on it depends on your region and the time of day.
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