Braille Patterns

Block from U+2800 to U+28FF. This block was introduced in Unicode version 3.0 (1999). It contains 256 codepoints.

The Wikipedia provides the following information on block Braille Patterns:

In Unicode, braille is represented in a block called Braille Patterns (U+2800..U+28FF). The block contains all 256 possible patterns of an 8-dot braille cell, thereby including the complete 6-dot cell range.

Chart at Unicode.org (PDF)
Block at Decode Unicode