Code point
U+2B12
Glyph appearance depends on your fonts.
U+2B12
SoU+2B12 SQUARE WITH TOP HALF BLACK is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Miscellaneous Symbols and Arrows block.
Choose the representation you need, then copy its value.
U+2B12
11026
⬒
⬒
E2 AC 92
2B12
00002B12
%E2%AC%92
\u2B12
\u2B12
\u2B12
\2B12