Who called from 2698454964

I received several calls from this no. some at 4:30 am so not sure from where this no. i s.

I've been called all night by this number i haven't got to answer it yet but when i tried to call it back it just does the operator beep and then my cell phone says "call failed Not allowed"

I also have received a call from this number  9/18/08 at 8:45 a.m.
Called back and received a busy signal once, and a call failed another