Received several calls per day from this particular phone number and Caller ID displays "Upper Marlboro MD 301-298-1634" and as usual no VM is left. Since no VM is left, the call wasn't important to begin with. I don't answer my landline from numbers that I don't recognize, regardless who it's from and if they can't leave a VM, then the call wasn't important. I tried to look this number up on goggle, but the webpage wasn't very helpful in determining who this could be.
Not sure who this is or what company this is, but they sure are a pain in the ---, that's for sure.
Received call from this number at 11:49 a.m. today (6/2/15). It left no VM. I called back from a blocked number and there was an automated greeting asking that I push 1, if I wanted to be removed from the call list. Of course I pushed nothing. Confirms that the practice of simply not answering such calls is the best thing to do.
For companies that actually have a human answer, when I have time, I sometimes just make a bunch of annoying calls to them. If nothing else, it affords me a little joy to know that I've annoyed them. LOL.