"Name not found" appears on caller i.d., left no message.

Caller ID - When my ID answers,m it ways leave a message.  Two different people call saying Hell0 Hello" female one time and male the next.  It is funny when the Machine says Leave a message, it means just that.  Going to Block this call as well as corresponding number.  We are on the Do Not Call List which is not worth the paper written on.  Wishing you luck at identifying these people.

This was an odd one. The ID showed up as "v01161704160080" - a bit longer than a usual caller ID string. It seemed like another ghost call except after a few seconds it said "good bye" in a female computerized voice.

someone called asking about our alarm system that we had with their company,
great another scammer, when will it end?

Takes a lot of patience and not answering unknown numbers in any way. It probably won't ever end completely, but you can really cut back on the amount of calls you get if you just let the phone ring without an answer at all.