As character names:

U+3190 IDEOGRAPHIC ANNOTATION LINKING MARK character (㆐)

As raw characters:

㆐

As a string of HTML entities:

㆐

Decoder output:

Byte number 1 is decimal 227, hex 0xE3, octal \343, binary 11100011
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 134, hex 0x86, octal \206, binary 10000110
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 144, hex 0x90, octal \220, binary 10010000
This is continuation byte 2, expecting 0 more.

U+3190	IDEOGRAPHIC ANNOTATION LINKING MARK
	= tateten