Code point
U+2258
Glyph appearance depends on your fonts.
U+2258
SmU+2258 CORRESPONDS TO is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Mathematical Operators block.
Choose the representation you need, then copy its value.
U+2258
8792
≘
≘
E2 89 98
2258
00002258
%E2%89%98
\u2258
\u2258
\u2258
\2258