As character names:

U+2048 QUESTION EXCLAMATION MARK 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 129, hex 0x81, octal \201, binary 10000001
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 136, hex 0x88, octal \210, binary 10001000
This is continuation byte 2, expecting 0 more.

U+2048	QUESTION EXCLAMATION MARK
	# 003F 0021