The Tamil Supplement block spans U+11FC0–U+11FFF, 64 codepoints in Plane 1 (Supplementary Multilingual Plane). 51 are assigned in Unicode 16.0; the other 13 are reserved for future characters.
All of its characters belong to the Tamil script.
By general category: 25 other symbols (So), 21 other numbers (No), 4 currency symbols (Sc), 1 other punctuation (Po).
The first 51 arrived in Unicode 12.0 (2019).
Because it lies outside the BMP, every character here takes four bytes in UTF-8 and a surrogate pair in UTF-16.