As character names:

U+29E0 SQUARE WITH CONTOURED OUTLINE character (⧠)

As raw characters:

⧠

As a string of HTML entities:

⧠

Decoder output:

Byte number 1 is decimal 226, hex 0xE2, octal \342, binary 11100010
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 167, hex 0xA7, octal \247, binary 10100111
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 160, hex 0xA0, octal \240, binary 10100000
This is continuation byte 2, expecting 0 more.

U+29E0	SQUARE WITH CONTOURED OUTLINE
	= D'Alembertian
	x (lower right drop-shadowed white square - 274F)