Block from U+10A60 to U+10A7F. This block was introduced in Unicode version 5.2 (2009). It contains 32 codepoints.
The Wikipedia provides the following information on block Old South Arabian:
Old South Arabian is a Unicode block containing characters for writing the Minean, Sabaean, Qatabanian, Hadramite, and Himyaritic languages of Yemen from the 8th century BCE to the 6th century CE.
Note that U+10A7D OLD SOUTH ARABIAN NUMBER ONE (𐩽) represents both the numeral one and a word divider.