The Tibetan block spans U+0F00–U+0FFF, 256 codepoints in Plane 0 (Basic Multilingual Plane). 211 are assigned in Unicode 16.0; the other 45 are reserved for future characters.
By script: Tibetan (207), Common (4).
By general category: 74 non-spacing marks (Mn), 50 other letters (Lo), 36 other symbols (So), 24 other punctuation (Po), 10 decimal digits (Nd), plus smaller groups.
The first 168 arrived in Unicode 2.0 (1996); later additions came in 3.0 (25), 4.1 (2), 5.1 (6), 5.2 (4), 6.0 (6).
Most characters here are combining marks. See combining diacritical marks.