Version Numbers

Last Updated
2007-06-27
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.
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Registry included below

IP Version Numbers

Registration Procedure(s)
IETF 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 ST ST Datagram Mode [RFC1190][Jim_Forgie]
6 IPv6 Internet Protocol version 6 [RFC1752]
7 TP/IX TP/IX: The Next Internet [RFC1475]
8 PIP The P Internet Protocol [RFC1621]
9 TUBA TUBA [RFC1347]
10-14 Unassigned [Jon_Postel]
15 Reserved [Jon_Postel]

People

ID Name Contact URI Last Updated
[Jim_Forgie] Jim Forgie mailto:FORGIE&xn.ll.mit.ed
[Jon_Postel] Jon Postel mailto:postel&isi.edu