Block from U+1D2C0 to U+1D2DF. This block was introduced in Unicode version 15.0 (2022). It contains 20 codepoints.
The Wikipedia provides the following information on block Kaktovik Numerals:
The Kaktovik Numerals are a Unicode block for the Kaktovik numerals, a base-20 system of numerical digits created by Alaskan Iñupiaq. It was first encoded in Unicode version 15 in 2022. It contains 20 characters for representing each of the digits 0-19 in the base-20 place value numeral system of Iñupiaq and related Inuit, Yupik, and Unangan languages.