Just got a call from this number. Checked it on Google and got to 800 notes (Thanks for your site). Saw enough comments. Then I tried calling it back. Sure enough. Got the "Disconnected sound and message." It's on my "Do not answer list" now.
An unwanted call from this North Hills VOIP number arrived today. When the answering machine picked up, the caller left no message, just dead space. Robocallers (unlawful telemarketers) do this all the time while trolling the phone lines seeking gullible schmucks to victimize.