Who called from 9782375706

Received a call from this number but did not answer.
Used my work phone to call back but number did not ring...just a blank line.
May be a fake phone ID.

Received a call from this number today 4/15/2015 at 10:31am EDT - tried to call it back did not get through heard only a fast busy signal.

Called my cell but left no message. Appears to be a robodialer of some sort.

Call from this number today at 10:10am Eastern - no message and tried to call back - fast busy.

Unknown Number that Just sent a text message to a website I recognize. I Do Not Want Contact with Any Telemarketing companies or Any Other Solisitor