Who called from 2145005678

I got calls from them 3 times in one day. I don't answer it because I don't know who it is and and I don't even recognize the area code. I decided to call back and it says their inbox isn't set up..

No one I know, didn't answer.  E Cohen  is listed on a reverse # look-up.

Second call came in 3 hours later.  Seems to be a different # each day with 2 of 3 attempts.

I have got two calls from this number did not answer. When i call back it says this is not a working number
I don't know what kind of game they are playing but i want it stoped. Guess i will answer and find out?

I listed my cell in Skype, thinking only my approved contacts would see it, and my group is small. Somehow this was obtained by someone outside my list, and I've been getting calls from other numbers everyday for since 2/15/13

Here's the list:

217-390-5451
201-587-5289
214-500-5678