As character names:

U+1ED9 LATIN SMALL LETTER O WITH CIRCUMFLEX AND DOT BELOW character (ộ)

As raw characters:

ộ

As a string of HTML entities:

ộ

Decoder output:

Byte number 1 is decimal 225, hex 0xE1, octal \341, binary 11100001
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 187, hex 0xBB, octal \273, binary 10111011
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+1ED9	LATIN SMALL LETTER O WITH CIRCUMFLEX AND DOT BELOW
	: 1ECD 0302