I got the following information from the website http://www.vocalist.org.uk/vocal_range_key.html

I am not clear what the numbers beside the notes (ie C4, G3) mean, so any enlightenment would be appreciated.

Soprano - High female voice, G3 (below middle C4) to F6 above high C6.
Coloratura - A singer, usually soprano, who sings ornamental passages in music - C4 to F6 or G6 above high C6

Lyric Soprano - Warmer middle sound - Bb3 below middle C4 to high C6 or D6

Spinto Soprano - Usually a thicker sound with more edge and volume but with the same range as a the Lyric Soprano

Dramatic Soprano - The loudest and lowest with cutting power - low Bb3 or A3, to a pushed high C6

Mezzo-Soprano - Middle female voice with dark quality, Low A3 or G3 (below middle C4) to about high A6 or Bb6 although some go to Eb6 above high C6.

Alto or Contralto - Low Female Voice, low C3 (below middle C4) to high C6 or up to high A6.

Tenor - High Male Voice, C (below middle C) to E above high C.
Countertenor - Highest male voice, also called alto, often falsetto
Heldentenor - Poweful dramatic tenor voice

Baritone - Middle Male Voice, low G to B natural just below the Tenor high C.

Bass - Baritone - More like a bass than a baritone, lacks the low bass notes

Bass - Low Male Voice, low E to G above middle C.

Basso Cantante - High bass voice suitable for solo singing

Basso Profundo - Deep bass voice encompassing about two octaves above C below the bass staff

These are just a few classifications which are split into sub classifications covering all types of vocal range and tone. Please note that the tone, resonance and ornamentation of the voice should be taken into consideration before assuming it falls into one or other 'fach'..... The amount of notes or range/register alone does NOT equal 'fach type'.