(HD) Mariah Carey - Live Vocal Range - MTV Shining Through The Rain Special (2003) 

Here is an encapsulation of Mariah's voice during this promotional concert.
Vocal Range:
Low Notes
=B2, C3, C#3, D3, Eb3, E3, F3, F#3, G3 & G#3
Belted Notes
=Bb4, B4, C5, C#5, D5, Eb5, E5, F5, F#5, G5 & A5
Head Voice Register
=A5, B5, C6, C#6 & D6
Super HV Register
=C6, D6, E6, F6, F#6, G6, G#6 & Bb6
Comment, like and sub!!