This number called once and after half a ring they hung up.  Five minutes later they called back.  Didn't leave a message or anything.

I too have been getting 513 calls. My caller ID just says 513. It is a loud piercing beep. It is always on weekday mornings after 9:00. They are within 5 minutes of each other and happens 3 times in a row...very annoying to say the least!

That info doesn't help anyone It's a number being spoofed and that's against the law (deception)

This is a scam
calling for different reasons
Stating different companies
Hiding behind a spoofed number
Student loans, house rentals , bad debts asking for money
TELL ME THIS IS NOT A SCAM

Was looking for jimmy then hung up