MATHEMATICAL LEFT WHITE SQUARE BRACKET U+27E6

BlockMiscellaneous Mathematical Symbols-A
CategoryOpen Punctuation
UTF-80xE2 0x9F 0xA6
UTF-160xFF 0xFE 0xE6 0x27
UTF-320xFF 0xFE 0x0 0x0 0xE6 0x27 0x0 0x0
HTML⟦
Pythonu"\u27E6"