I don't answer the phone unless I know who it is.
This entity did not leave a message.
Periodically marketing/survey companies try to validate phone numbers so they can annoy you with political surveys as the elections get closer.  They sell lists of valid numbers to pollsters, etc. GRRRR!

4/07/17 13:48 PDT  ID reads NORTHSOUND PT, which I didn't recognize, so I didn't answer, since number was also unfamiliar.  Fortunately, this was a valid caller, who left a message.  Turned out to be a building permit inspection co. to set  up an appointment.  Their name is iPermit ERaters.  Mentioned discrepancy and they are going to check, since I am at least the second person to mention it.