Does anybody know the NAL unit start codes for H.265?

For H.264 its'
Code:
NAL Units start code: 00 00 01 X Y
X =  IDR Picture NAL Units (25, 45, 65)
X = Non IDR Picture NAL Units (01, 21, 41, 61) with 01 = b-frames, 41 = p-frames
since frames can be splitted over multiple NAL Units only count the NAL Units with Y > 0x80
Background: I want to extend my little frame counter program which counts frames in raw (H.264/MPEG-ASP/VC-1) streams.

Cu Selur