I usually don't answer unknown numbers, but this one looked to be a local call from my area code, so I thought maybe it was legit and answered. But no, got a hang up.
Curiously, about an hour earlier I posted an ad on Craigslist trying to sell something, and left my number. Wondering if maybe it had something to do with that. Like perhaps someone calls numbers posted in ads to confirm they are functional, in connection with creating a list of valid number to sell to marketers??