U+0023 was added to Unicode in version 1.1 (1993). It belongs to the block Basic Latin in the 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, 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.


System Representation
UTF-8 23
UTF-16 00 23
UTF-32 00 00 00 23
URL-Quoted %23
HTML-Escape #
Wrong windows-1252 Mojibake #
HTML-Escape #
digraph Nb
alias pound sign
alias hash
alias crosshatch
alias octothorpe
LaTeX \#

Related Characters

  • ﹟
  • #


Complete Record

Property Value
Age (age) 1.1
Unicode Name (na) NUMBER SIGN
Unicode 1 Name (na1)
Block (blk) ASCII
General Category (gc) Other Punctuation
Script (sc) Common
Bidirectional Category (bc) European Terminator
Combining Class (ccc) Not Reordered
Decomposition Type (dt) None
Decomposition Mapping (dm) #
Lowercase (Lower)
Simple Lowercase Mapping (slc) #
Lowercase Mapping (lc) #
Uppercase (Upper)
Simple Uppercase Mapping (suc) #
Uppercase Mapping (uc) #
Simple Titlecase Mapping (stc) #
Titlecase Mapping (tc) #
Case Folding (cf) #
ASCII Hex Digit (AHex)
Alphabetic (Alpha)
Bidi Control (Bidi_C)
Bidi Mirrored (Bidi_M)
Bidi Paired Bracket (bpb) #
Bidi Paired Bracket Type (bpt) None
Cased (Cased)
Composition Exclusion (CE)
Case Ignorable (CI)
Full Composition Exclusion (Comp_Ex)
Changes When Casefolded (CWCF)
Changes When Casemapped (CWCM)
Changes When NFKC Casefolded (CWKCF)
Changes When Lowercased (CWL)
Changes When Titlecased (CWT)
Changes When Uppercased (CWU)
Dash (Dash)
Deprecated (Dep)
Default Ignorable Code Point (DI)
Diacritic (Dia)
East Asian Width (ea) Narrow
Extender (Ext)
FC NFKC Closure (FC_NFKC) #
Grapheme Cluster Break (GCB) Any
Grapheme Base (Gr_Base)
Grapheme Extend (Gr_Ext)
Hex Digit (Hex)
Hangul Syllable Type (hst) Not Applicable
Hyphen (Hyphen)
ID Continue (IDC)
Ideographic (Ideo)
ID Start (IDS)
IDS Binary Operator (IDSB)
IDS Trinary Operator and (IDST)
Indic Positional Category (InPC) NA
Indic Syllabic Category (InSC) Other
ISO 10646 Comment (isc)
Joining Group (jg) No_Joining_Group
Join Control (Join_C)
Jamo Short Name (JSN)
Joining Type (jt) Non Joining
Line Break (lb) Alphabetic
Logical Order Exception (LOE)
Math (Math)
Noncharacter Code Point (NChar)
NFC Quick Check (NFC_QC) Yes
NFD Quick Check (NFD_QC) Yes
NFKC Casefold (NFKC_CF) #
NFKC Quick Check (NFKC_QC) Yes
NFKD Quick Check (NFKD_QC) Yes
Numeric Type (nt) None
Numeric Value (nv) NaN
Other Alphabetic (OAlpha)
Other Default Ignorable Code Point (ODI)
Other Grapheme Extend (OGr_Ext)
Other ID Continue (OIDC)
Other ID Start (OIDS)
Other Lowercase (OLower)
Other Math (OMath)
Other Uppercase (OUpper)
Pattern Syntax (Pat_Syn)
Pattern White Space (Pat_WS)
Quotation Mark (QMark)
Radical (Radical)
Sentence Break (SB) Other
Simple Case Folding (scf) #
Script Extension (scx) Common
Soft Dotted (SD)
STerm (STerm)
Terminal Punctuation (Term)
Unified Ideograph (UIdeo)
Variation Selector (VS)
Word Break (WB) Other
White Space (WSpace)
XID Continue (XIDC)
XID Start (XIDS)
Expands On NFC (XO_NFC)
Expands On NFD (XO_NFD)
Expands On NFKC (XO_NFKC)
Expands On NFKD (XO_NFKD)