Block from U+0F00 to U+0FFF. This block was introduced in Unicode version 2.0 (1996). It contains 211 codepoints.
The Wikipedia provides the following information on block Tibetan:
Tibetan is a Unicode block containing characters for the Tibetan, Dzongkha, and other languages of Tibet, Bhutan, Nepal, and northern India. The Tibetan Unicode block is unique for having been allocated as a standard virama-based encoding for version 1.0, removed from the Unicode Standard when unifying with ISO 10646 for version 1.1, then reintroduced as an explicit root/subjoined encoding, with a larger block size in version 2.0.