Who called from 6042902000

When this caller calls me, there is no answer on the other end.  When I call this number, there is also no answer.

I got a call from a colleague's cellphone (i.e. a legitimate call) that showed this number on my display, but it certainly isn't their cellphone number so I have no explanation for that.  They were in downtown Vancouver at the time. Maybe the local cell carrier there is masking caller ID, or providing this number for cells that have unlisted numbers?

DISREGARD THE LAST MSG THE ABOVE STATED IS CORRECT I HAD A CLIENT CALL ME TODAY FROM INTERNET PHONE AND THAT WAS THE NUMBER THAT HAD APPEARED

Received 3 missed calls around 1:00AM from this number and there was a strange voice mail that I couldn't really tell what they were saying, perhaps "olah"?

We received a call from this number on our mexican cell phone, called back and received no answer.