They have been calling my business for a few weeks now. Same thing - when you answer there is no one there, or they hang up. Don't they have anything better to do with their time?
I keep getting calls from this number, sometimes up to 3 times a day. I never answer it. You may be able to do what I did (I'm with Verizon). I saw on a website that you can block bothersome numbers that call or text your cellphone. The site I saw it on is:
http://www.ehow.com/how_4890408_unwanted-calls-through-verizon-wireless.html
company calling didn't identify themselves. Said they are calling on Verizon's behalf. They call me occasionally, and I always tell them to not contact me again. When I asked why they are calling today as I've asked not to be contacted by them, they just hung up on me.
caller ID showed: UNKNOWN NAME
telephone number: 860 256 6154