Numbers with this prefix were first introduced in 2005.While 5736601956 was originally issued with the info above, the owner of the phone number (573) 660-1956 may have transferred it through a process called porting.
Caller name: No Idea?
Caller type: Prison/Jail Collect Call
I have no idea who they are, but I've received many calls from them in the past 3 days, but no one is ever there. I'm guessing it's an automated dialer but their operators can't keep pace with the calls, thus, a human never picks up.