The Combining Diacritical Marks Supplement block spans U+1DC0–U+1DFF, 64 codepoints in Plane 0 (Basic Multilingual Plane). Every one of them is assigned in Unicode 16.0.

All of its characters belong to the Inherited script.

By general category: 64 non-spacing marks (Mn).

The first 4 arrived in Unicode 4.1 (2005); later additions came in 5.0 (9), 5.1 (28), 5.2 (1), 6.0 (1), 7.0 (15), and 3 later versions.

Most characters here are combining marks. See combining diacritical marks.