BTW: "200" exchanges rarely exist, which is an indicator that the number displayed on caller id is likely spoofed.

Same bullsh*t call that I've been trying to stop from these clowns for over a year.  The magic question from the caller is "How are you today?" which is my signal to hang up.  I don't suppose they want to hear about my itchy *ss.

Receive calls several times a day, asking for someone who is not here, then i say wrong number  they ask if they are calling "walmart" I say no, I wish to not have calls come again. Just today I finally got fed up of repeating myself and asked for a supervisor (for the 20th time) and they said they PROMISE that they will not call again, after i told them one more time of calling i will report them for harrassment. so what happens i get a phone call at 8:05a ( while i was in a business parking lot) no sooner of me getting off the phone with them- by then it was 8:10a I walk into the business sit down and at 8:15a I received another phone call from them AGAIN..

no caller ID ... did not leave me a message

Caller ID says San Francisco. Did not leave message.
Prob. a trade magazine want to confirm email etc... I never answer. If they do not leave a msg it is not important enough. They will send an email if they have yours, to renew your subscription, they don't want to loose you because they make money of it!
They just do their job.