Block from U+1D360 to U+1D37F. This block was introduced in Unicode version 5.0 (2006). It contains 25 codepoints.
The Wikipedia provides the following information on block Counting Rod Numerals:
Counting Rod Numerals is a Unicode block containing traditional Chinese counting rod symbols, which mathematicians used for calculation in ancient China, Japan, Korea, and Vietnam. The orientation of the Unicode characters follows Song dynasty convention, with digits represented as horizontal lines, and tens represented as vertical lines, which differs from Han dynasty practice which represented digits as vertical lines, and tens as horizontal lines.