The Duployan block spans U+1BC00–U+1BC9F, 160 codepoints in Plane 1 (Supplementary Multilingual Plane). 143 are assigned in Unicode 16.0; the other 17 are reserved for future characters.
All of its characters belong to the Duployan script.
By general category: 139 other letters (Lo), 2 non-spacing marks (Mn), 1 other symbols (So), 1 other punctuation (Po).
The first 143 arrived in Unicode 7.0 (2014).
Because it lies outside the BMP, every character here takes four bytes in UTF-8 and a surrogate pair in UTF-16.