As character names:

U+FED9 ARABIC LETTER KAF ISOLATED FORM character (ﻙ)

As raw characters:

ﻙ

As a string of HTML entities:

ﻙ

Decoder output:

Byte number 1 is decimal 240, hex 0xF0, octal \360, binary 11110000
This is the first byte of a 4 byte sequence.

Byte number 2 is decimal 143, hex 0x8F, octal \217, binary 10001111
This is continuation byte 1, expecting 2 more.

Byte number 3 is decimal 187, hex 0xBB, octal \273, binary 10111011
This is continuation byte 2, expecting 1 more.

Byte number 4 is decimal 153, hex 0x99, octal \231, binary 10011001
This is continuation byte 3, expecting 0 more.

U+FED9	ARABIC LETTER KAF ISOLATED FORM
	# <isolated> 0643