I got a string of creepy and weird calls from this number, when I pick up there is no one on the other end but i hear creepy 8-bit style music (individual tones). and at the very end someone says some really creepy stuff.
First call was at 8:46 pm, and the person at the end says "flight 11".
Second call was at 9:03 pm, and a person says "flight 175".
3rd call was at 9:37 pm, and a person says "Pentagon"
4rd call was at 9:59 pm, and a person says "White House"
5th call was at 10:28 pm, and a person days "2753 people"
6th call was at 10:29 pm, and the person says "7 days".

What's really creepy is that today is 9/4/2011.
in 7 days, guess what? its 9/11/2011. 10th year after the 9/11/2001 terrorist attacks.
each of the other 5 calls corresponds to a time in the 9/11 attacks,
with what happened/what was the target. call #5 summarizes that 2753 people died that day.

I tried to redial the number but the operator tells me its not a valid phone number.

Either someone I don't know if playing an elaborate prank (9/11 is nothing to joke about)
Or they are warning of a terrorist attack that will happen in 7 days.

I recieved a call from an unknown/blocked number, I ignored it and shortly after the 666 666 9999 number called. Saved both numbers and blocked them.