Caller ID says "DBA ROBERT RAKES".  They leave no message.

I call back after hours (using *67 to block my number).  I hear a fax machine trying to connect.  I am unclear on who this is.  Perhaps they dialed a wrong number.

Got another call.  I called back during the day (using *67 to block my number).  It was someone from the Lions club looking for a donation.  They do so about once a year.  The call was polite, but I let him know that I am unlikely to contribute if they use a caller ID that does not reflect who they are.  Sounds like the caller was making calls from his work number.