On NANOG today (Sept. 3 2009) Brian Raaen of ZCORUM discussed how AT&T had originated their prefix and was blackholing it. Checking in the IAR archives, it looks like AT&T has been originating it since July 22nd of 2009.
TIme of hijack report:
2009-07-22 12:43:54
hijacking AS:
7018
prefix:
72.14.76.0/24
trusted origin AS:
701
AS path observed:
5413 3356 7018
