i think its from singapore. one of my friend is there who used to call me often whos number ll start with +656.

got a missed call. Tried to call back but couldn't, the number could not be completed as dialed. who are you.

by the way, the number appeared on my phone as this: +6567328618 thought this might be an international call as +656 is not my country code but can't find any country with this code. weird.