Call from this number came in on my cellphone with no caller ID so I let it roll to voicemail.  The caller kept the line open for 30 or so seconds after voicemail kicked in but left no message. I could hear a lot of background noise mostly chatter in an unknown language.  A search on this number brings up the law offices of Gregory L Jackson in Bakersfield, CA.  Skip tracing and debt collection do not appear to be the areas of law this practice engages in.  Until they leave a message that gives me a reason to either or answer their calls or call back I will continue to ignore them.  I suspect this is an offshore scammers call center spoofing a real law firm's number either knowingly or by accident.