The Phaistos Disc block spans U+101D0U+101FF, 48 codepoints in Plane 1 (Supplementary Multilingual Plane). 46 are assigned in Unicode 16.0; the other 2 are reserved for future characters.

By script: Common (45), Inherited (1).

By general category: 45 other symbols (So), 1 non-spacing marks (Mn).

The first 46 arrived in Unicode 5.1 (2008).

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