Told me it was some security company, just don't know

THIS IS S.A.I. SECURITY- THEY ARE A HOME ALARM MONITORING SERVICE LIKE A.D.T. OR BRINKS. THEY CALL YOU BEFORE THEY CALL POLICE IF AN ALARM GOES OFF AT  HOME.

I think these people are trying to sell alarm monitoring.  I recieved a call from them saying they were receiving an alarm from one of my doors.  I knew it wasn't my monitoring company but I went along with it.  I said I don't know how you could because I'm home.  He said he was just telling me because he had to and then hung up.  I think he was baiting me to see if I said I either didn't have an alarm or that I didn't have monitoring.  If I said either I'm thinking he would have pitched a sale to me.

This number now belongs to CastleRock Security
Very unethical company

Oh yes, Castle Rock. And they will call over and over from several different numbers too.