The Bengali block spans U+0980–U+09FF, 128 codepoints in Plane 0 (Basic Multilingual Plane). 96 are assigned in Unicode 16.0; the other 32 are reserved for future characters.
All of its characters belong to the Bengali script.
By general category: 55 other letters (Lo), 10 non-spacing marks (Mn), 10 spacing marks (Mc), 10 decimal digits (Nd), 6 other numbers (No), plus smaller groups.
The first 89 arrived in Unicode 1.1 (1993); later additions came in 4.0 (1), 4.1 (1), 5.2 (1), 7.0 (1), 10.0 (2), 11.0 (1).