The Arabic Extended-C block spans U+10EC0–U+10EFF, 64 codepoints in Plane 1 (Supplementary Multilingual Plane). 7 are assigned in Unicode 16.0; the other 57 are reserved for future characters.
All of its characters belong to the Arabic script.
By general category: 4 non-spacing marks (Mn), 3 other letters (Lo).
The first 3 arrived in Unicode 15.0 (2022); later additions came in 16.0 (4).
Most letters here are written right to left. See bidirectional text.
Most characters here are combining marks. See combining diacritical marks.
Because it lies outside the BMP, every character here takes four bytes in UTF-8 and a surrogate pair in UTF-16.