| CARVIEW |
Select Language
HTTP/2 200
date: Mon, 14 Jul 2025 10:53:12 GMT
content-type: text/html; charset=utf-8
x-ratelimit-remaining: 195
x-ratelimit-requested-tokens: 5
x-ratelimit-burst-capacity: 200
x-ratelimit-replenish-rate: 100
vary: Accept-Encoding
x-frame-options: SAMEORIGIN
referrer-policy: origin-when-cross-origin
content-security-policy: frame-ancestors *.icann.org
strict-transport-security: max-age=48211200; preload
cf-cache-status: DYNAMIC
set-cookie: __cf_bm=2TBXLz.uSxWzOtYNcPErEfqoLEQwNaYv_z3qs_HdSjc-1752490392-1.0.1.1-bSDf5yqJvnRZBP8YZsQD0ibnEah7sgR7ZIr_SqlyFR3yyBBLIHeKunfJnm7i5gxnI1G_iKwPH3hpK1fAm97MtEGg.lNuE5LASHD03XFfRW0; path=/; expires=Mon, 14-Jul-25 11:23:12 GMT; domain=.icann.org; HttpOnly; Secure; SameSite=None
server: cloudflare
cf-ray: 95f079910aeef470-BLR
content-encoding: gzip
Acronyms and Terms
ICANN Acronyms and Terms
ICANN has hundreds of acronyms and terms, which can be confusing. We created this multilingual tool to help explain what these terms mean and facilitate your work within the ICANN community.
ICANN Acronyms and Terms
Type in the acronym or term you are looking for in the Search bar below.
In addition to English, translated versions of acronyms and terms are also available in Arabic, Chinese, French, Russian, and Spanish. Links for each language are located in the top right of the page.
Click the first letter of the term you are looking for to search alphabetically.
Do you have feedback on the definitions or the terms? Send us an email to: [email protected].
I
Internet Protocol version 4(IPv4)
The first version of the Internet Protocol (IP) to gain popular use. The Defense Advanced Research Projects Agency developed IPv4 in the early 1980s. With an address length of 32 bits, IPv4 has a capacity of just over four billion unique IP addresses. After years of rapid Internet expansion, its pool of available addresses has been fully allocated to Internet services providers and users.
IPv4 addresses are written as a sequence of four decimal values between 0 and 255, separated by dots. A typical IPv4 address looks like this: 192.0.2.67.
Related Term