The Phags-pa block spans U+A840–U+A87F, 64 codepoints in Plane 0 (Basic Multilingual Plane). 56 are assigned in Unicode 16.0; the other 8 are reserved for future characters.
All of its characters belong to the Phags Pa script.
By general category: 52 other letters (Lo), 4 other punctuation (Po).
The first 56 arrived in Unicode 5.0 (2006).