Block from U+A720 to U+A7FF. This block was introduced in Unicode version 5.0 (2006). It contains 159 codepoints.
The Wikipedia provides the following information on block Latin Extended-D:
Latin Extended-D is a Unicode block containing Latin characters for phonetic, Mayan, and Medieval transcription and notation systems. 89 of the characters in this block are for medieval characters proposed by the Medieval Unicode Font Initiative.