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Silent Key callsign harvesting
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K7AQ (since 1987)
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Maidenhead grid

DM14ic

133 active licensees across 12 ZIP codes centered in this square. Each dot is a ZIP code, sized by licensee count.

ZIP codes

ZIPCityHams
92415San Bernardino, CA45
92410San Bernardino, CA32
92408San Bernardino, CA17
92423San Bernardino, CA11
92411San Bernardino, CA10
92427San Bernardino, CA5
92406San Bernardino, CA4
92413San Bernardino, CA4
92402San Bernardino, CA3
92401San Bernardino, CA2
92403San Bernardino, CA0
92418San Bernardino, CA0