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Silent Key callsign harvesting
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K7AQ (since 1987)
Look up a callsign:
Maidenhead grid

CM87ss

794 active licensees across 30 ZIP codes centered in this square. Each dot is a ZIP code, sized by licensee count.

ZIP codes

ZIPCityHams
94122San Francisco, CA182
94114San Francisco, CA137
94117San Francisco, CA127
94121San Francisco, CA93
94118San Francisco, CA89
94115San Francisco, CA74
94102San Francisco, CA46
94119San Francisco, CA12
94141San Francisco, CA7
94142San Francisco, CA6
94172San Francisco, CA5
94147San Francisco, CA4
94159San Francisco, CA4
94164San Francisco, CA3
94146San Francisco, CA2
94139San Francisco, CA1
94140San Francisco, CA1
94188San Francisco, CA1
94120San Francisco, CA0
94125San Francisco, CA0
94126San Francisco, CA0
94137San Francisco, CA0
94143San Francisco, CA0
94144San Francisco, CA0
94145San Francisco, CA0
94151San Francisco, CA0
94160San Francisco, CA0
94161San Francisco, CA0
94163San Francisco, CA0
94177San Francisco, CA0