The Phonetic Extensions Supplement block spans U+1D80–U+1DBF, 64 codepoints in Plane 0 (Basic Multilingual Plane). Every one of them is assigned in Unicode 16.0.

By script: Latin (63), Greek (1).

By general category: 37 modifier letters (Lm), 27 lowercase letters (Ll).

The first 64 arrived in Unicode 4.1 (2005).

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