rfc820.txt

RFC 相关的技术文档

Network Working Group                                          J. Postel
Request for Comments: 820                                      J. Vernon
                                                            January 1983

Obsoletes RFCs:  790, 776, 770, 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, subject to the agreement between
DARPA/IPTO and DDN/PMO about number allocation, documented in Appendix A
of this RFC.  If you are developing a protocol or application that will
require the use of a link, socket, port, protocol, or network number
please contact Jon to receive a number assignment.

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

   phone: [phone]

   ARPANET mail: POSTEL@ISIF

The ARPANET community is making the transition form the ARPANET to the
ARPA Internet.  This has been characterized as the NCP/TCP transition
[63], although many other the protocols are involved, too.  The working
documents for the new Internet environment have been collected by the
Network Information Center (NIC) in a book entitled the "Internet
Protocol Transition Workbook" [62].

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
"Internet Protocol Transition Workbook" or in the old "Protocol
Handbook" [17] prepared by the NIC.  Some of the items listed are
undocumented.

In all cases the name and mailbox of the responsible individual is
indicated.  In the lists that follow, a bracketed entry, e.g., [17,iii],
at the right hand margin of the page indicates a reference for the
listed protocol, where the number cites the document and the "iii" cites
the person.


Postel                                                          [Page 1]


RFC 820                                                     January 1983
                                                        Assigned Numbers
Network Numbers


                        ASSIGNED NETWORK NUMBERS

   The network numbers listed here are used as internet addresses by the
   Internet Protocol (IP) [33,62].  The IP uses a 32-bit address field
   and divides that address into a network part and a "rest" or local
   address part.  The division takes 3 forms or classes.

      The first type of address, or class A, has a 7-bit network number
      and a 24-bit local address.  The highest-order bit is set to 0.
      This allows 128 class A networks.

                           1                   2                   3   
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |0|   NETWORK   |                Local Address                  |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

                             Class A Address

      The second type of address, class B, has a 14-bit network number
      and a 16-bit local address.  The two highest-order bits are set to
      1-0.  This allows 16,384 class B networks.

                           1                   2                   3   
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |1 0|           NETWORK         |          Local Address        |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

                             Class B Address

      The third type of address, class C, has a 21-bit network number
      and a 8-bit local address.  The three highest-order bits are set
      to 1-0-0.  This allows 2,097,152 class C networks.

                           1                   2                   3   
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |1 1 0|                    NETWORK              | Local Address |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

                             Class C Address

   One commonly used notation for internet host addresses divides the
   32-bit address into four 8-bit fields and specifies the value of each
   field as a decimal number with the fields separated by periods.  This
   is called the "dotted decimal" notation.  For example, the internet
   address of ISIF in dotted decimal is 010.002.000.052, or 10.2.0.52.


Postel                                                          [Page 2]


RFC 820                                                     January 1983
                                                        Assigned Numbers
Network Numbers


   The dotted decimal notation will be used in the listing of assigned
   network numbers.  The class A networks will have nnn.rrr.rrr.rrr, the
   class B networks will have nnn.nnn.rrr.rrr, and the class C networks
   will have nnn.nnn.nnn.rrr, where nnn represents part or all of a
   network number and rrr represents part or all of a local address or
   rest field.

   For various reasons, the assigned numbers of networks are sometimes
   changed.  To ease the transition the old number will be listed as
   well.  These "old number" entries will be marked with a "T" following
   the number and preceeding the name.

   To reflect the allocation of network identifiers among various
   categories (see Appendix A), a one-character code is placed to the
   left of the network number (in the column marked by an asterisk): R
   for Research and Development, D for DoD, and C for Commercial.

   Assigned Network Numbers

   Class A Networks

      * Internet Address  Name          Network               References
        ----------------  ----          -------               ----------
        000.rrr.rrr.rrr                 Reserved                   [JBP]
      R 001.rrr.rrr.rrr T BBN-PR        BBN Packet Radio Network  [JAW3]
      R 002.rrr.rrr.rrr T SF-PR-1       SF-1 Packet Radio Network  [JEM]
      R 003.rrr.rrr.rrr   RCC-NET       BBN RCC Network            [JGH]
      R 004.rrr.rrr.rrr   SATNET        Atlantic Satellite Network[DM11]
      D 005.rrr.rrr.rrr T DEMO-PR-1     Demo-1 Packet Radio Network[LCS]
      R 006.rrr.rrr.rrr T SF-PR-2       SF-2 Packet Radio Network  [JEM]
        007.rrr.rrr.rrr                 Unassigned                 [JBP]
      R 008.rrr.rrr.rrr   BBN-NET       BBN Network                [JGH]
      D 009.rrr.rrr.rrr T BRAGG-PR      Ft. Bragg Packet Radio Net [JEM]
      R 010.rrr.rrr.rrr   ARPANET       ARPANET              [17,1,REK2]
      R 011.rrr.rrr.rrr T UCLNET        University College London   [PK]
        012.rrr.rrr.rrr                 Unassigned                 [JBP]
        013.rrr.rrr.rrr                 Unassigned                 [JBP]
      C 014.rrr.rrr.rrr   PDN           Public Data Network       [REK2]
        015.rrr.rrr.rrr                 Unassigned                 [JBP]
        016.rrr.rrr.rrr                 Unassigned                 [JBP]
        017.rrr.rrr.rrr                 Unassigned                 [JBP]
      R 018.rrr.rrr.rrr   MIT           MIT Network          [10,43,NC3]
        019.rrr.rrr.rrr                 Unassigned                 [JBP]
        020.rrr.rrr.rrr                 Unassigned                 [JBP]
      D 021.rrr.rrr.rrr   EDN           DCEC EDN                   [EC5]
        022.rrr.rrr.rrr                 Unassigned                 [JBP]
      R 023.rrr.rrr.rrr   MITRE         MITRE Cablenet          [44,APS]
        024.rrr.rrr.rrr                 Unassigned                 [JBP]


Postel                                                          [Page 3]


RFC 820                                                     January 1983
                                                        Assigned Numbers
Network Numbers


      R 025.rrr.rrr.rrr   RSRE-PPSN     RSRE / PPSN                 [NM]
      D 026.rrr.rrr.rrr   MILNET        MILNET                     [HH6]
      R 027.rrr.rrr.rrr   NOSC-LCCN     NOSC / LCCN                [KTP]
      R 028.rrr.rrr.rrr   WIDEBAND      Wide Band Satellite Net   [CJW2]
        029.rrr.rrr.rrr                 Unassigned                 [JBP]
      R 030.rrr.rrr.rrr   DCN-UCL       UCL DCNET                   [PK]
        031.rrr.rrr.rrr                 Unassigned                 [JBP]
      R 032.rrr.rrr.rrr   UCL-TAC       UCL TAC                     [PK]
        033.rrr.rrr.rrr                 Unassigned                 [JBP]
        034.rrr.rrr.rrr                 Unassigned                 [JBP]
      R 035.rrr.rrr.rrr   RSRE-NULL     RSRE Null Network           [NM]
      R 036.rrr.rrr.rrr T SU-NET        Stanford University Network[JCM]
        037.rrr.rrr.rrr                 Unassigned                 [JBP]
        038.rrr.rrr.rrr                 Unassigned                 [JBP]
      R 039.rrr.rrr.rrr   SRINET        SRI Local Network         [GEOF]
        040.rrr.rrr.rrr                 Unassigned                 [JBP]
      R 041.rrr.rrr.rrr   BBN-LN-TEST   BBN Local Network Testbed  [KTP]
        042.rrr.rrr.rrr                 Unassigned                 [JBP]
        043.rrr.rrr.rrr                 Unassigned                 [JBP]
      R 044.rrr.rrr.rrr   AMPRNET       Amateur Radio Experiment Net[HM]
      R 045.rrr.rrr.rrr T C3-PR         Testbed Development PRNET  [BG5]
      R 046.rrr.rrr.rrr   UCB-ETHER     UC Berkeley Ethernet       [SXL]
      R 047.rrr.rrr.rrr T SAC-PR        SAC Packet Radio Network   [BG5]
      R 048.rrr.rrr.rrr   NDRE-TIU      NDRE-TIU                   [PS3]
        049.rrr.rrr.rrr                 Unassigned                 [JBP]
      R 050.rrr.rrr.rrr   NDRE-RING     NDRE-RING                  [PS3]
        051.rrr.rrr.rrr                 Unassigned                 [JBP]
      R 052.rrr.rrr.rrr T ROCKWELL-PR   Rockwell Packet Radio Net  [EHP]
        053.rrr.rrr.rrr-126.rrr.rrr.rrr Unassigned                 [JBP]
        127.rrr.rrr.rrr                 Reserved                   [JBP]

   Class B Networks

      * Internet Address  Name          Network               References
        ----------------  ----          -------               ----------
        128.000.rrr.rrr                 Reserved                   [JBP]
      R 128.001.rrr.rrr   BBN-TEST-B    BBN-GATE-TEST-B            [RH6]
      R 128.002.rrr.rrr   CMU-NET       CMU-Ethernet              [HDW2]
      R 128.003.rrr.rrr   LBL-CSAM      LBL-CSAM-RESEARCH          [MO1]
      R 128.004.rrr.rrr   DCNET         LINKABIT DCNET            [DLM1]
      R 128.005.rrr.rrr   FORDNET       FORD DCNET                [DLM1]
      R 128.006.rrr.rrr   RUTGERS       RUTGERS                   [CLH3]
      R 128.007.rrr.rrr   DFVLR         DFVLR DCNET Network       [HDC1]
      R 128.008.rrr.rrr   UMDNET        Univ of Maryland DCNET    [DLM1]
      R 128.009.rrr.rrr   ISI-NET       ISI Local Network          [CMR]
      R 128.010.rrr.rrr   PURDUE-CS     Purdue Computer Science    [CXK]
      R 128.011.rrr.rrr   BBN-CRONUS    BBN DOS Project         [12,WIM]
      R 128.012.rrr.rrr   SU-NET        Stanford University Net    [JCM]


Postel                                                          [Page 4]


RFC 820                                                     January 1983
                                                        Assigned Numbers
Network Numbers


      D 128.013.rrr.rrr   MATNET        Mobile Access Terminal Net[DM11]
      R 128.014.rrr.rrr   BBN-SAT-TEST  BBN SATNET Test Net       [DM11]
      R 128.015.rrr.rrr   S1NET         LLL-S1-NET                [EAK1]
      R 128.016.rrr.rrr   UCLNET        University College London   [PK]
        128.017.rrr.rrr                 Unassigned                 [JBP]
        128.018.rrr.rrr                 Unassigned                 [JBP]
        128.019.rrr.rrr                 Unassigned                 [JBP]
        128.020.rrr.rrr                 Unassigned                 [JBP]
      R 128.021.rrr.rrr   SF-PR-1       SF-1 Packet Radio Network  [JEM]
      R 128.022.rrr.rrr   SF-PR-2       SF-2 Packet Radio Network  [JEM]
      R 128.023.rrr.rrr   BBN-PR        BBN Packet Radio Network  [JAW3]
      R 128.024.rrr.rrr   ROCKWELL-PR   Rockwell Packet Radio Net  [EHP]
      D 128.025.rrr.rrr   BRAGG-PR      Ft. Bragg Packet Radio Net [JEM]
      D 128.026.rrr.rrr   SAC-PR        SAC Packet Radio Network   [BG5]
      D 128.027.rrr.rrr   DEMO-PR-1     Demo-1 Packet Radio Network[LCS]
      D 128.028.rrr.rrr   C3-PR         Testbed Development PR NET [BG5]
        128.029.rrr.rrr-191.254.rrr.rrr Unassigned                 [JBP]
        191.255.rrr.rrr                 Reserved                   [JBP]

   Class C Networks

      * Internet Address  Name          Network               References
        ----------------  ----          -------               ----------
        192.000.000.rrr                 Reserved                   [JBP]
      R 192.000.001.rrr   BBN-TEST-C    BBN-GATE-TEST-C            [RH6]
        192.000.002.rrr-192.000.255.rrr Unassigned                 [JBP]
      R 192.001.xxx.rrr-192.004.xxx.rrr BBN local networks         [SGC]
      R 192.005.001.rrr   CISLNET       CISL Multics Network       [CH2]
      R 192.005.002.rrr   WISC          Univ of Wisconsin Madison [RS23]
      C 192.005.003.rrr   HP-DESIGN-AIDS HP Design Aids            [NXK]
      C 192.005.004.rrr   HP-TCG-UNIX   Hewlett Packard TCG Unix   [NXK]
      D 192.005.005.rrr   BRLNET        BRLNET                  [1,MJM2]
      D 192.005.006.rrr   MINET         MINET                    [1,DHH]
      R 192.005.007.rrr   CIT-CS-NET    Caltech-CS-Net          [65,DSW]
      R 192.005.008.rrr   WASHINGTON    University of Washington  [JAR4]
      R 192.005.009.rrr   AERONET       Aerospace Labnet         [9,LCN]
      R 192.005.010.rrr   ECLNET        USC-ECL-CAMPUS-NET         [MXB]
      R 192.005.011.rrr   CSS-RING      SEISMIC-RESEARCH-NET       [RR2]
      R 192.005.012.rrr   UTAH-NET      UTAH-COMPUTER-SCIENCE-NET  [RF1]
        192.005.013.rrr                 Unassigned                 [JBP]
        192.005.014.rrr                 Unassigned                 [JBP]
        192.005.015.rrr                 Unassigned                 [JBP]
        192.005.016.rrr                 Unassigned                 [JBP]
        192.005.017.rrr                 Unassigned                 [JBP]
        192.005.018.rrr                 Unassigned                 [JBP]
        192.005.019.rrr                 Unassigned                 [JBP]
        192.005.020.rrr                 Unassigned                 [JBP]
      D 192.005.021.rrr   BRLNET1       BRLNET1                 [1,MJM2]


Postel                                                          [Page 5]


RFC 820                                                     January 1983
                                                        Assigned Numbers
Network Numbers


      D 192.005.022.rrr   BRLNET2       BRLNET2                 [1,MJM2]
      D 192.005.022.rrr   BRLNET3       BRLNET3                 [1,MJM2]
      D 192.005.022.rrr   BRLNET4       BRLNET4                 [1,MJM2]
      D 192.005.022.rrr   BRLNET5       BRLNET54                [1,MJM2]
        192.005.026.rrr-223.255.254.rrr Unassigned                 [JBP]
        223.255.255.rrr                 Reserved                   [JBP]

   Other Reserved Internet Addresses

        Internet Address  Name          Network               References
        ----------------  ----          -------               ----------
        224.000.000.000-255.255.255.255 Reserved                   [JBP]

   Network Totals

      Assigned

         Class         A         B         C     Total

         Research     26        19      1033      1078

         Defense       4         5         7        16

         Commercial    1         0         2         3