It's from "Mammoth Real Estate"

calls hangs up

If you have a prepaid phone and you get a call from this number, do not call it back; they charged me $1.75 for receiving the call and another $1.75 for calling them back to find out who they were.

I have spent the last 30 minutes with Virgin mobile trying to get my $3.50 back because of these scam artists.

I thought 555 was only in the movies.