As character names:

U+20DD COMBINING ENCLOSING CIRCLE 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 131, hex 0x83, octal \203, binary 10000011
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 157, hex 0x9D, octal \235, binary 10011101
This is continuation byte 2, expecting 0 more.

U+20DD	COMBINING ENCLOSING CIRCLE
	= JIS composition circle
	= Cyrillic combining ten thousands sign
	x (white circle - 25CB)
	x (large circle - 25EF)
	x (ideographic number zero - 3007)