Version Numbers

Last Updated
2018-11-06
Note
In the Internet Protocol (IP) [RFC791] there is a field to identify
the version of the internetwork general protocol.  This field is 4
bits in size.
  
Available Formats

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Registry included below

IP Version Numbers

Registration Procedure(s)
Standards Action
Reference
[RFC2780]
Available Formats

CSV
Decimal Keyword Version Reference
0-1 Reserved [Jon_Postel][RFC4928]
2-3 Unassigned [Jon_Postel]
4 IP Internet Protocol [RFC791][Jon_Postel]
5 Reserved (Historic) [RFC1819][SC589H]
6 IPv6 Internet Protocol version 6 [RFC8200]
7 TP/IX TP/IX: The Next Internet [RFC6814]
8 Reserved (Historic) [RFC1621][SC589H]
9 Reserved (Historic) [RFC1347][SC589H]
10-14 Unassigned [Jon_Postel]
15 Reserved [Jon_Postel]

People

ID Name Contact URI Last Updated
[Jon_Postel] Jon Postel mailto:postel&isi.edu