The Number Forms block spans U+2150–U+218F, 64 codepoints in Plane 0 (Basic Multilingual Plane). 60 are assigned in Unicode 16.0; the other 4 are reserved for future characters.
By script: Latin (41), Common (19).
By general category: 39 letter numbers (Nl), 17 other numbers (No), 2 other symbols (So), 1 uppercase letters (Lu), 1 lowercase letters (Ll).
The first 48 arrived in Unicode 1.1 (1993); later additions came in 3.0 (1), 5.0 (1), 5.1 (4), 5.2 (4), 8.0 (2).
49 characters here have compatibility decompositions: they are formatting variants of other characters and are replaced by them under NFKC and NFKD. See normalization.