Answer: (as no-one got it): 555 is the number used in all American TV shows and movies as the area dialling code, no matter where someone is phoning to or from. It's a non-existent code so people don't try phoning numbers they hear on the telly. Next time you hear someone telling someone a phone number listen out for it.
Question: I started a recent thread about SETI - what does SETI stand for?
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