As character names:

U+3019 RIGHT WHITE TORTOISE SHELL 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 153, hex 0x99, octal \231, binary 10011001
This is continuation byte 2, expecting 0 more.

U+3019	RIGHT WHITE TORTOISE SHELL BRACKET
	x (mathematical right white tortoise shell bracket - 27ED)