The Hangul Jamo Extended-B block spans U+D7B0–U+D7FF, 80 codepoints in Plane 0 (Basic Multilingual Plane). 72 are assigned in Unicode 16.0; the other 8 are reserved for future characters.
All of its characters belong to the Hangul script.
By general category: 72 other letters (Lo).
The first 72 arrived in Unicode 5.2 (2009).