I received a lot of calls from this number.

Well, I tried answering "hello", but the call was still disconnected. So, so much for my theory. LOL. I'm just not going to answer when I see that number on caller ID anymore.

DITTO! I also called back "Number not in service". They've been calling for several days, We are a business and I answer the phone with a business name. I'm going to try to answer with "hello" next time to see if they respond. Some telemarketer controls are set to only respond to "hello" because their target is home owners, not businesses. So, the call is automatically disconnected if the machine doesn't hear a "hello"; then the telemarketer doesn't have to waste time. But if that's the case with this company, I don't know why they keep calling back. I'd think the number would be removed from the data base and not called again.

I just called the number back and it said that the number was not in service. How bizarre!

This number has called my work number several times and there isn't anyone there. It is very frustrating.

I have also received about 7-8 phone calls from this number in the past 2 days.  No response on the other end.

called again. same thing.

any clue who this is? hung up after I said hello three times.