Block from U+0180 to U+024F. This block was introduced in Unicode version 1.1 (1993). It contains 208 codepoints.
The Wikipedia provides the following information on block Latin Extended-B:
Latin Extended-B is a block (0180-024F) of the Unicode Standard. It has been included since version 1.0, where it was only allocated to the code points U+0180..U+01FF and contained 113 characters. During unification with ISO 10646 for version 1.1, the block was expanded, and another 65 characters were added. In version 3.0, the last thirty available code points in the block were assigned.