Standard re entrant uke has almost two octaves, from C4 to A5 at the 12 fret - (to C6 at the 15th fret if yours has it).
Fit a low G string & you start at G3 - going up to F6 on concert/tenor with 20 frets.
(gCEA/GCEA tunings.)
(Baritones normally start at D3.)