The Ol Onal block spans U+1E5D0–U+1E5FF, 48 codepoints in Plane 1 (Supplementary Multilingual Plane). 44 are assigned in Unicode 16.0; the other 4 are reserved for future characters.
All of its characters belong to the Ol Onal script.
By general category: 31 other letters (Lo), 10 decimal digits (Nd), 2 non-spacing marks (Mn), 1 other punctuation (Po).
The first 44 arrived in Unicode 16.0 (2024).
Because it lies outside the BMP, every character here takes four bytes in UTF-8 and a surrogate pair in UTF-16.