Call was to my work number.  Caller ID was "OKLA CITY     OK".  I did not answer and they did not leave a voice mail.  Anyone who calls our number and is legitimate will leave a voice mail.  No message/voice mail = not legitimate.  Have received other calls in the past with the same caller ID, but slightly different number.

did not answer call.
do not want to waste my time on someone I do not recognize
or know