What means
is the block octant-12358. Unicode classifies it as an “other symbol” — Unicode's shelf for signs that are neither maths, money nor punctuation and files it in the Symbols for Legacy Computing Supplement block; this site shelves it under Lines & boxes.
Its appearance depends on the font and text styling.
How it is encoded
is a single code point, U+1CD87. In HTML that is , and in CSS \1CD87.
Don't confuse it with
4Questions people ask
1Why does show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type
Windows (Word)
Alt+XType 1CD87, then Alt+X to get .
Windows
Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win + .).
macOS
Control+Command+SpaceOpen the character viewer and search “block octant-12358”.
Linux
Ctrl+Shift+UType 1cd87, then Enter or Space.
HTML
𜶇CSS
\1CD87Codes and encoding1 code points
HTML decimal
𜶇
HTML hex
𜶇
CSS content
content: "\1CD87";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%F0%9C%B6%87
1
On screen
1
Code points
2
JS .length
4
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.