Assigned numbers
RFC 770

Document Type RFC - Historic (September 1980; No errata)
Obsoleted by RFC 776
Obsoletes RFC 762
Last updated 2013-03-02
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Network Working Group                                          J. Postel
Request for Comments: 770                                            ISI
                                                          September 1980

Obsoletes RFCs:  762, 758, 755,
750, 739, 604, 503, 433, 349
Obsoletes IENs:  127, 117, 93

                            ASSIGNED NUMBERS

This Network Working Group Request for Comments documents the currently
assigned values from several series of numbers used in network protocol
implementations.  This RFC will be updated periodically, and in any case
current information can be obtained from Jon Postel.  The assignment of
numbers is also handled by Jon.  If you are developing a protocol or
application that will require the use of a link, socket, etc. please
contact Jon to receive a number assignment.

   Jon Postel
   USC - Information Sciences Institute
   4676 Admiralty Way
   Marina del Rey, California  90291

   phone: (213) 822-1511

   ARPANET mail: POSTEL@ISIF

Most of the protocols mentioned here are documented in the RFC series of
notes.  The more prominent and more generally used are documented in the
Protocol Handbook [1] prepared by the Network Information Center (NIC).
In the lists that follow a bracketed number, e.g. [1], off to the right
of the page indicates a reference for the listed protocol.

Postel                                                          [Page 1]



RFC 770                                                   September 1980
                                                        Assigned Numbers
Network Numbers

                        ASSIGNED NETWORK NUMBERS

   This list of network numbers is used in the internet, the field is
   8 bits in size.

   Assigned Network Numbers

      Decimal   Octal  Name        Network                    References
      -------   -----  ----        -------                    ----------
            0       0              Reserved
            1       1  BBN-PR      BBN Packet Radio Network
            2       2  SF-PR-1     SF Bay Area Packet Radio Network (1)
            3       3  BBN-RCC     BBN RCC Network
            4       4  SATNET      Atlantic Satellite Network
            5       5  SILL-PR     Ft. Sill Packet Radio Network
            6       6  SF-PR-2     SF Bay Area Packet Radio Network (2)
            7       7  CHAOS       MIT CHAOS Network
            8      10  CLARKNET    SATNET subnet for Clarksburg
            9      11  BRAGG-PR    Ft. Bragg Packet Radio Network
           10      12  ARPANET     ARPANET                         [1,2]
           11      13  UCLNET      University College London Network
           12      14  CYCLADES    CYCLADES
           13      15  NPLNET      National Physical Laboratory
           14      16  TELENET     TELENET
           15      17  EPSS        British Post Office EPSS
           16      20  DATAPAC     DATAPAC
           17      21  TRANSPAC    TRANSPAC
           18      22  LCSNET      MIT LCS Network               [37,38]
           19      23  TYMNET      TYMNET
           20      24  DC-PR       Washington D.C. Packet Radio Network
           21      25  EDN         DCEC EDN
           22      26  DIALNET     DIALNET                       [47,48]
           23      27  MITRE       MITRE Cablenet                   [23]
           24      30  BBN-LOCAL   BBN Local Network
           25      31  RSRE-PPSN   RSRE / PPSN
           26      32  AUTODIN-II  AUTODIN II
           27      33  NOSC-LCCN   NOSC / LCCN
           28      34  WIDEBAND    Wide Band Satellite Network
           29      35  DCN-COMSAT  COMSAT Distributed Computing Network
           30      36  DCN-UCL     UCL Distributed Computing Network
           31      37  BBN-SAT-TEST  BBN SATNET Test Network
           32      40  UCL-CR1     UCL Cambridge Ring 1
           33      41  UCL-CR2     UCL Cambridge Ring 2
           34      42  MATNET      Mobile Access Terminal Network
           35      43  NULL        UCL/RSRE Null Network
           36      44  SU-NET      Stanford University Ethernet

Postel                                                          [Page 2]



RFC 770                                                   September 1980
                                                        Assigned Numbers
Network Numbers

           37      45  DECNET      Digital Equipment Network
           38      46  DECNET-TEST  Test Digital Equipment Network
       39-254  47-376              Unassigned
          255     377              Reserved

Postel                                                          [Page 3]



RFC 770                                                   September 1980
                                                        Assigned Numbers
Internet Protocol Versions

                  ASSIGNED INTERNET PROTOCOL VERSIONS

   In the Internet Protocol (IP) there is a field to identify the
   version of the internetwork general protocol.  This field is 4 bits
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