Internet numbers
RFC 1020

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Network Working Group                                         S. Romano
Request for Comments: 1020                                     M. Stahl
Obsoletes RFCs: 997, 990, 960, 943,                                 SRI
923, 900, 870, 820, 790, 776, 770, 762,                   November 1987
758, 755, 750, 739, 604, 503, 433, 349
Obsoletes IENs:  127, 117, 93

                            INTERNET NUMBERS

STATUS OF THIS MEMO

   This memo is an official status report on the network numbers used in
   the Internet community.  Distribution of this memo is unlimited.

Introduction

   The responsibility for the assignment of IP numbers and ASNs has been
   assumed by Hostmaster at the DDN Network Information Center (NIC).
   The Hostmaster staff are indebted to Dr. Jon Postel and Ms. Joyce
   Reynolds of the Information Sciences Institute at the University of
   Southern California for their ongoing assistance.

   This Network Working Group Request for Comments documents the
   currently assigned network numbers and gateway autonomous systems.
   This RFC will be updated periodically, and in any case current
   information can be obtained from Hostmaster.

         Hostmaster
         DDN Network Information Center
         SRI International
         333 Ravenswood Avenue
         Menlo Park, California  94025

         Phone: 1-800-235-3155

         ARPA mail: HOSTMASTER@SRI-NIC.ARPA

   Most of the protocols used in the Internet are documented in the RFC
   series of notes.  Some of the items listed are undocumented.  Further
   information on protocols can be found in the memo "Official Internet
   Protocols" [32].  The more prominent and more generally used are
   documented in the "DDN Protocol Handbook" [12] prepared by the NIC.
   Other collections of older or obsolete protocols are contained in the
   "Internet Protocol Transition Workbook" [13], or in the "ARPANET
   Protocol Transition Handbook" [14].  For further information on
   ordering the complete 1985 DDN Protocol Handbook, contact the
   Hostmaster.

Romano & Stahl                                                  [Page 1]
RFC 1020                    Internet Numbers               November 1987

   The entries below contain the name and network mailbox of the
   individuals responsible for each registered network or autonomous
   system.  The bracketed entry, e.g., [nn,iii], at the right hand
   margin of the page indicates a reference for the listed network or
   autonomous system, where the number ("nn") cites the document and the
   letters ("iii") cites the handle of the responsible person.  The NIC
   Handle is a unique identifier that is used in the NIC WHOIS (NICNAME)
   service.  People sometimes change electronic mailboxes.  To find out
   the latest mailbox or phone number of a contact, use the NIC
   WHOIS/NICNAME server or contact HOSTMASTER@SRI-NIC.ARPA.

   The convention used for the documentation of Internet Protocols is to
   express numbers in decimal and to picture data in "big-endian" order
   [31].  That is, fields are described left to right, with the most
   significant octet on the left and the least significant octet on the
   right.

   The order of transmission of the header and data described in this
   document is resolved to the octet level.  Whenever a diagram shows a
   group of octets, the order of transmission of those octets is the
   normal order in which they are read in English.  For example, in the
   following diagram the octets are transmitted in the order they are
   numbered.

       0                   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       |       2       |       3       |       4       |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |       5       |       6       |       7       |       8       |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |       9       |      10       |      11       |      12       |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

                        Transmission Order of Bytes

   Whenever an octet represents a numeric quantity the left most bit in
   the diagram is the high order or most significant bit.  That is, the
   bit labeled 0 is the most significant bit.  For example, the
   following diagram represents the value 170 (decimal).

                               0 1 2 3 4 5 6 7
                              +-+-+-+-+-+-+-+-+
                              |1 0 1 0 1 0 1 0|
                              +-+-+-+-+-+-+-+-+

                           Significance of Bits

Romano & Stahl                                                  [Page 2]
RFC 1020                    Internet Numbers               November 1987

   Similarly, whenever a multi-octet field represents a numeric quantity
   the left most bit of the whole field is the most significant bit.