Code point
U+29F3
Glyph appearance depends on your fonts.
U+29F3
SmU+29F3 ERROR-BARRED BLACK CIRCLE is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Miscellaneous Mathematical Symbols-B block.
Choose the representation you need, then copy its value.
U+29F3
10739
⧳
⧳
E2 A7 B3
29F3
000029F3
%E2%A7%B3
\u29F3
\u29F3
\u29F3
\29F3