No name on the caller ID and no message left.

4807507252 called Monday, Feb 22 2016 at 11:50am
Caller ID says Phoenix AZ but Phoenix is area code 602
They rang twice and hung up -

called 2/24, 8:47 AM, left no message.  Caller ID is "unknown name".  480 area code is metro Phoenix.

Called for a A/C tuneup

Someone who identified himself as Bert called my elderly mother in the 85044 zip and said he was from The Wellness Group.  They would be performing accessment testing and provide it to her doctor.  She allowed them to schedule an appt for her for next week and he said they,d send a car for her since she no longer drives.  I called the # on her caller I.D. and a man's voice said "hello?  Please leave a message."
First clue, didn't refer to her doctor by name.  When she told me they were sending a car for her.... WTF??? Watch out for your aging parents, ya'll!