As character names:

U+27EA MATHEMATICAL LEFT DOUBLE ANGLE BRACKET 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 159, hex 0x9F, octal \237, binary 10011111
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 170, hex 0xAA, octal \252, binary 10101010
This is continuation byte 2, expecting 0 more.

U+27EA	MATHEMATICAL LEFT DOUBLE ANGLE BRACKET
	= z notation left chevron bracket
	x (left double angle bracket - 300A)