Actually they just left a message this time.  6124249059 - Stellar Recovery, Inc.  Apparently a bill collector.

Sick of getting this weird phone number.  Leaves no message.

8:18 am, who the (expletive deleted) is calling me? no message left. returned call got some "the number you have dialed is not in service" message. If it's a bill collector (and I'm pretty up to date with whom I owe) They're new to me.

Received a call from this phone number. Number unknown. No message left Approx. 845a.m.
Displays unpublished phone number in whitepages.com