I often get some weird numbers calling me, often you can tell when they're just telemarketers, or a machine calling numbers to see if it get's answered on not, at which point it's then added to a list.
However today someone called me from 999-000-0000 asking for Rosa or something. They seemed quite confused. I told them wrong number and they called back once more, again looking for Rosa or something.. It was weak English with I think an Asian accent.
Certainly thought it was a strange number.
I just finished reading The Bourne Legacy by Eric Van Lustbader which has me probably into paranoid thinking