As character names:

U+300A LEFT DOUBLE ANGLE BRACKET 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 128, hex 0x80, octal \200, binary 10000000
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 138, hex 0x8A, octal \212, binary 10001010
This is continuation byte 2, expecting 0 more.

U+300A	LEFT DOUBLE ANGLE BRACKET
	x (left-pointing double angle quotation mark - 00AB)
	x (mathematical left double angle bracket - 27EA)