Code point
U+23A3
Glyph appearance depends on your fonts.
U+23A3
SmU+23A3 LEFT SQUARE BRACKET LOWER CORNER is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Miscellaneous Technical block.
Choose the representation you need, then copy its value.
U+23A3
9123
⎣
⎣
E2 8E A3
23A3
000023A3
%E2%8E%A3
\u23A3
\u23A3
\u23A3
\23A3