ASCII 153
Character 153 ()
Latin-1 Supplement
Unassigned in Latin-1 / part of the C1 control block. Not used in modern text encoding; browsers accept these code points but they carry no display glyph.
Common uses & context
Decimal 153 (0x99) falls in the C1 control range (128–159). In the Latin-1 (ISO-8859-1) encoding these code points are unassigned control positions with no visible glyph, and in Windows-1252 many of them were repurposed for typographic characters like curly quotes and the em dash. That mismatch is a classic cause of mojibake: a byte stored as Windows-1252 but decoded as Latin-1 (or UTF-8) shows the wrong character or a replacement box.
In modern Unicode, U+0099 is a C1 control code. Its UTF-8 encoding is the two-byte sequence 0xC2 0x99, which is why a raw high byte 0x99 from a legacy Latin-1 file becomes garbled when a program assumes UTF-8.
All encodings at a glance
| Decimal | 153 |
| Hexadecimal | 0x99 |
| Octal | 0231 |
| Binary | 10011001 |
| HTML numeric entity | ™ |
| URL encoding | %99 |
| UTF-8 bytes | 0xC2 0x99 |
Code snippets
JavaScript
String.fromCharCode(153); // ""
153.toString(16); // "99"Python
chr(153) # control char
ord(chr(153)) # 153
hex(153) # '0x99'HTML
™ <!-- numeric entity (no named entity for this character) -->Programming notes
- ▸Code 153 is in the C1 control range — unassigned in Latin-1, repurposed in Windows-1252.
- ▸A raw byte 0x99 decoded as UTF-8 becomes garbage; specify the correct charset explicitly.
- ▸UTF-8 encoding: 0xC2 0x99; Unicode code point U+0099.
Unicode & UTF-8 note
In Unicode this is U+0099. In UTF-8 it encodes to the byte sequence 0xC2 0x99. In legacy Latin-1 (ISO-8859-1) it is a single byte 0x99, which is why Latin-1 files often appear as mojibake when interpreted as UTF-8.
Frequently asked questions
What character is ASCII code 153?
ASCII code 153 is the character '' (Character 153). In hexadecimal it is 0x99, in octal 0231, and in binary 10011001.
What is 0x99 in ASCII?
Hexadecimal 0x99 equals decimal 153, which is the character '' (Character 153). To convert hex to ASCII yourself, read the two hex digits as a base-16 number (0x99 = 153) and look up that code point.
How do I write the character with code 153 in code?
In JavaScript use String.fromCharCode(153); in Python use chr(153); in HTML use the numeric entity ™. In a URL it is percent-encoded as %99, and in UTF-8 it is stored as the byte sequence 0xC2 0x99.