This may be an upsell call from Cox Communications. My Dad is a subscriber and answered on the second ring, finding only silence. The caller had abandoned instantly. Caller ID CNAM read only "Cox".
He's endured several peekaboo calls for the past eight days from a different number said to be for Cox sales. Its CNAM each time was "Cox Cable". They either abandoned the moment his phone recorder is detected or cause it to record a few dud seconds of silence.
http://800notes.com/Phone.aspx/1-408-418-5564/5
He's been a steady customer of the local cable TV service for maybe 35 years and three different owners. Its value was nibbled away over time after Cox took over. Over the last decade their telemarketing campaigns have been similarly irritating and relentless. I think they're way overdue for a cease-comm letter, assuming it's really Cox and not some spoofing scam outfit.
Thanks for your fine explanation. I received a couple of calls without messages on my answering service today from this number. Cox is a likely culprit; they certainly send enough offers via my mail.
I have been receiving messages from this number for 3-4 days now: It sounds like someone whispering from the end of a tunnel and the message only lasts about 3-5 seconds.... VERY annoying ! ESPECIALLY if it's from Cox (my provider also).