What the 4-digit code every commercial aircraft broadcasts actually tells air traffic control

Every commercial flight has a squawk code. Learn why there are only 4,096 codes, what 7500, 7600, and 7700 mean, and how ATC ...
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What's a six-digit verification code — and why you should never share it

Add Yahoo as a preferred source to see more of our stories on Google. What's a six-digit verification code — and why you should never share it What's a verification code, and why are they so important ...