Home U+0000 to U+007F Basic Latin
Glyph for U+0023
Source: Noto Sans

U+0023 Number Sign

U+0023 was added to Unicode in version 1.1 (1993). It belongs to the block U+0000 to U+007F Basic Latin in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Other Punctuation and is commonly used, that is, in no specific script. The character is also known as pound sign (weight), hashtag, hash, crosshatch and octothorpe.

The glyph is not a composition. It has a Narrow East Asian Width. In bidirectional context it acts as European Terminator and is not mirrored. In text U+0023 behaves as Alphabetic regarding line breaks. It has type Other for sentence and Other for word breaks. The Grapheme Cluster Break is Any.

The CLDR project labels this character “hash sign” for use in screen reading software. It assigns additional tags, e.g. for search in emoji pickers: hash, hashtag, lb, number, pound.

This character is designated as an emoji. It will be rendered as monochrome character on conforming platforms. To enable colorful emoji display, you can combine it with Glyph for U+FE0F Variation Selector-16: #️ See the Emojipedia for more details on this character’s emoji properties.


System Representation
UTF-8 23
UTF-16 00 23
UTF-32 00 00 00 23
URL-Quoted %23
HTML hex reference #
HTML named entity #
alias pound sign (weight)
alias hashtag
alias hash
alias crosshatch
alias octothorpe
AGL: Latin-1 numbersign
AGL: Latin-2 numbersign
AGL: Latin-3 numbersign
AGL: Latin-4 numbersign
AGL: Latin-5 numbersign
Adobe Glyph List numbersign
digraph Nb

Related Characters


Complete Record

Property Value
Age 1.1 (1993)
Unicode Name NUMBER SIGN
Unicode 1 Name
Block Basic Latin
General Category Other Punctuation
Script Common
Bidirectional Category European Terminator
Combining Class Not Reordered
Decomposition Type None
Decomposition Mapping Glyph for U+0023 Number Sign
Simple Lowercase Mapping Glyph for U+0023 Number Sign
Lowercase Mapping Glyph for U+0023 Number Sign
Simple Uppercase Mapping Glyph for U+0023 Number Sign
Uppercase Mapping Glyph for U+0023 Number Sign
Simple Titlecase Mapping Glyph for U+0023 Number Sign
Titlecase Mapping Glyph for U+0023 Number Sign
Case Folding Glyph for U+0023 Number Sign
ASCII Hex Digit
Bidi Control
Bidi Mirrored
Composition Exclusion
Case Ignorable
Changes When Casefolded
Changes When Casemapped
Changes When NFKC Casefolded
Changes When Lowercased
Changes When Titlecased
Changes When Uppercased
Full Composition Exclusion
Default Ignorable Code Point
Emoji Modifier Base
Emoji Component
Emoji Modifier
Emoji Presentation
Extended Pictographic
FC NFKC Closure Glyph for U+0023 Number Sign
Grapheme Cluster Break Any
Grapheme Base
Grapheme Extend
Grapheme Link
Hex Digit
ID Continue
ID Start
IDS Binary Operator
IDS Trinary Operator and
ID_Compat_Math_Continue 0
ID_Compat_Math_Start 0
InCB None
Indic Mantra Category
Indic Positional Category NA
Indic Syllabic Category Other
Jamo Short Name
Join Control
Logical Order Exception
Noncharacter Code Point
NFC Quick Check Yes
NFD Quick Check Yes
NFKC Casefold Glyph for U+0023 Number Sign
NFKC Quick Check Yes
NFKC_SCF Glyph for U+0023 Number Sign
NFKD Quick Check Yes
Other Alphabetic
Other Default Ignorable Code Point
Other Grapheme Extend
Other ID Continue
Other ID Start
Other Lowercase
Other Math
Other Uppercase
Prepended Concatenation Mark
Pattern Syntax
Pattern White Space
Quotation Mark
Regional Indicator
Sentence Break Other
Soft Dotted
Sentence Terminal
Terminal Punctuation
Unified Ideograph
Variation Selector
Word Break Other
White Space
XID Continue
XID Start
Expands On NFC
Expands On NFD
Expands On NFKC
Expands On NFKD
Bidi Paired Bracket Glyph for U+0023 Number Sign
Bidi Paired Bracket Type None
East Asian Width Narrow
Hangul Syllable Type Not Applicable
ISO 10646 Comment
Joining Group No_Joining_Group
Joining Type Non Joining
Line Break Alphabetic
Numeric Type None
Numeric Value not a number
Simple Case Folding Glyph for U+0023 Number Sign
Script Extension
Vertical Orientation R