The Mathematical Alphanumeric Symbols block spans U+1D400–U+1D7FF, 1,024 codepoints in Plane 1 (Supplementary Multilingual Plane). 996 are assigned in Unicode 16.0; the other 28 are reserved for future characters.

All of its characters have the script value Common: they are shared across writing systems rather than tied to one.

By general category: 492 lowercase letters (Ll), 444 uppercase letters (Lu), 50 decimal digits (Nd), 10 math symbols (Sm).

The first 991 arrived in Unicode 3.1 (2001); later additions came in 4.0 (1), 4.1 (2), 5.0 (2).

996 characters here have compatibility decompositions: they are formatting variants of other characters and are replaced by them under NFKC and NFKD. See normalization.

Because it lies outside the BMP, every character here takes four bytes in UTF-8 and a surrogate pair in UTF-16.