This character is a Math Symbol and is commonly used, that is, in no specific script.
The glyph is a canonical composition of the glyphs Identical To, Combining Long Solidus Overlay. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is mirrored. The word that U+2262 forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
The triple bar or tribar, ≡, is a symbol with multiple, context-dependent meanings indicating equivalence of two different things. Its main uses are in mathematics and logic. It has the appearance of an equals sign ⟨=⟩ with a third line.
Representations
System
Representation (click value to copy)
Nº
8802
UTF-8
E2 89 A2
UTF-16
22 62
UTF-32
00 00 22 62
URL-Quoted
%E2%89%A2
HTML hex reference
≢
Wrong windows-1252 Mojibake
≢
HTML named entity
≢
HTML named entity
≢
Encoding: EUC_JIS_2004 (hex bytes)
A2 EB
Encoding: EUC_JISX0213 (hex bytes)
A2 EB
Encoding: GB18030 (hex bytes)
81 36 D8 37
Encoding: ISO2022_JP_2004 (hex bytes)
1B 24 28 51 22 6B 1B 28 42
Encoding: ISO2022_JP_3 (hex bytes)
1B 24 28 4F 22 6B 1B 28 42
Encoding: SHIFT_JIS_2004 (hex bytes)
81 E9
Encoding: SHIFT_JISX0213 (hex bytes)
81 E9
LATEX
\not\equiv
Adobe Glyph List
notidentical
RFC 5137
\u'2262'
Bash and Zsh inside echo -e
\u2262
C and C++
\u2262
C#
\u2262
CSS
\002262
Excel
=UNICHAR(8802)
Go
\u2262
JavaScript
\u2262
Modern JavaScript since ES6
\u{2262}
JSON
\u2262
Java
\u2262
Lua
\u{2262}
Matlab
char(8802)
Perl
"\x{2262}"
PHP
\u{2262}
PostgreSQL
U&'\2262'
PowerShell
`u{2262}
Python
\u2262
Ruby
\u{2262}
Rust
\u{2262}
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