I'm getting called from this number (Dave included) multiple times a day.  A call back is unsuccessful.  I've tried to get them to stop by going through the pitch in hopes of getting to a human but to no avail.

I am getting calls from from 657-202-6398, 321-400-5640 & 213-788-7635.  When I asked them to remove me from their call list they just hang up.  This happened many times.  They were calling me on behalf of this company pinnaclesecurity.com

Got many calls. The calling marketing company is SpeedKnock.com from 801-916-3978 / Sales@speedknock.com.  I have filed a complain to FCC here: https://complaints.donotcall.gov/complaint/complaintcheck.aspx

got many computer based calls from Pinnacle Devcon home security group.

LANDSERVICES
213-788-7635
801-852-8321

Home security crap. Banned for life from calling my number. Good luck ever getting through again