IP Version Numbers
- Last Updated
- 2021-01-28
- Note
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In the Internet Protocol (IP) [RFC791][RFC8200] 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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XML
HTML
Plain text
Registry Included Below
IP Version Numbers
- Registration Procedure(s)
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Standards Action
- Reference
- [RFC2780]
- Available Formats
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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][Moving IP versions 5, 8, and 9 to Historic] | |
| 6 | IPv6 | Internet Protocol version 6 | [RFC8200] |
| 7 | Reserved (Historic) | [RFC1475][RFC6814] | |
| 8 | Reserved (Historic) | [RFC1621][Moving IP versions 5, 8, and 9 to Historic] | |
| 9 | Reserved (Historic) | [RFC1347][Moving IP versions 5, 8, and 9 to Historic] | |
| 10-14 | Unassigned | [Jon_Postel] | |
| 15 | Reserved | [Jon_Postel] |
Contact Information
| ID | Name | Contact URI | Last Updated |
|---|---|---|---|
| [Jon_Postel] | Jon Postel | mailto:postel&isi.edu |