Who called from 4048910535

My call blocker blocks any area code that begins with 4.
That is all area codes from 400 thru 499. I don't know anyone in these area codes.
It works every time. You enter 4 instead of 404 and it works. Try it under area code blocking.

I am suddenly getting these on my cell phone-unable to reach anyone calling back.  Please stop these calls.

I have received numerous calls from this phone number but do not answer.  It is from the Atlanta area.