Sole-proprietorship EIN or SSN for issuing 1099 to subcontractor?

I am a sole-proprietor who needs to send a 1099 to a subcontractor. 

  1. Should I use my EIN or SSN? 
  2. Should I send the 1099 with my name or the DBA name? 
  3. Do each have advantages or disadvantages over the other? 

Thanks!