The Latin Extended-C block spans U+2C60–U+2C7F, 32 codepoints in Plane 0 (Basic Multilingual Plane). Every one of them is assigned in Unicode 16.0.
All of its characters belong to the Latin script.
By general category: 15 uppercase letters (Lu), 15 lowercase letters (Ll), 2 modifier letters (Lm).
The first 17 arrived in Unicode 5.0 (2006); later additions came in 5.1 (12), 5.2 (3).