The Devanagari block spans U+0900–U+097F, 128 codepoints in Plane 0 (Basic Multilingual Plane). Every one of them is assigned in Unicode 16.0.
By script: Devanagari (122), Inherited (4), Common (2).
By general category: 80 other letters (Lo), 23 non-spacing marks (Mn), 11 spacing marks (Mc), 10 decimal digits (Nd), 3 other punctuation (Po), plus smaller groups.
The first 104 arrived in Unicode 1.1 (1993); later additions came in 4.0 (1), 4.1 (1), 5.0 (4), 5.1 (2), 5.2 (5), and 2 later versions.