The Vai block spans U+A500–U+A63F, 320 codepoints in Plane 0 (Basic Multilingual Plane). 300 are assigned in Unicode 16.0; the other 20 are reserved for future characters.
All of its characters belong to the Vai script.
By general category: 286 other letters (Lo), 10 decimal digits (Nd), 3 other punctuation (Po), 1 modifier letters (Lm).
The first 300 arrived in Unicode 5.1 (2008).