Who called from 4804288923

after they called I missed the call call back and it says the phone is not working

when I call the number back it says not a working number how can I not working how can I work a non working number call me

you mean you haven't heard of caller ID spoofing?
https://en.wikipedia.org/wiki/Caller_ID_spoofing

Got a call today.  Seems like I get a call from this # every few weeks (with a caller ID of UNKNOWN NAME).  Never anyone on the other end (always dead air). I no longer answer.

Wed April 20 2016 3:27pm
480-428-8923 called - rang 3 times and hung up - did not wait for answering machine to answer
Caller ID said Phoenix AZ but Phoenix is 602 area code