Whenever I place a call to an 800 # from my cell phone this shows up as the number I am calling from.

I did a search on google and found a listing on a job site with this number listed as a contact number, the company is temporary worker company.

Someone keeps calling me from this number, but they will not leave a message. When I call back the recording says "this number has been disconnected"

repeated calls no messages are left.  When I try to call back I get MSL this number is not available