Update: Decided to try to call the number (with my number blocked). Wouldn't go through. Finally tried it without blocking my number. Still wouldn't go through. So obviously a scam number ("Your call could not go through. Please check the number and try again.")
Call from Phoenix, Arizona. Left no message. This area code is responsible for a lot of spam calls I get, but no one else has reported it yet. Guess we'll find out!
Update: Decided to try to call the number (with my number blocked). Wouldn't go through. Finally tried it without blocking my number. Still wouldn't go through. So obviously a scam number ("Your call could not go through. Please check the number and try again.")