Some kind of spam or telemarketer. It was a recorded voice, and never connected to a human. Be wary of phone scams!

a debt collector

National Credit Adjusters debt collectors

this number calls me about 10 times a day and when I answers I hear a beep click and then get disconnected they never leave a message.  It's is very annoying.

4438637638 getting calls from this number for a pay day loan.  I never had a pay day loan they are a scam.  Requested they send me information about original debt.  Have not received anything.  They are a scam