Subject: Helpful information for building filters

This section contains IP and ethernet protocol information which should be helpful when building filters, or when analyzing network traces. Most of the following information was provided by John Dwyer. He also notes that the definitive reference on assigned numbers is available via ftp at
ftp://nic.ddn.mil/rfc/RFC1700.TXT
and contains a plethora of material, including vendor addresses, multicast and broadcast ranges, etc.

Tables included below:

Well known IP (TCP & UDP) Port numbers:

    Decimal   Description    
    -------   -----------    
     0        Reserved
     1        TCP Port Service Multiplexer
     2        Management Utility
     3        Compression Process
     4        Unassigned
     5        Remote Job Entry
     6        Unassigned
     7        Echo
     8        Unassigned
     9        Discard
    10        Unassigned
    11        Active Users
    12        Unassigned
    13        Daytime
    14        Unassigned
    15        Unassigned
    16        Unassigned
    17        Quote of the Day
    18        Message Send Protocol
    19        Character Generator
    20        File Transfer [Default Data]
    21        File Transfer [Control]
    22        Unassigned
    23        Telnet
    24        any private mail system
    25        Simple Mail Transfer
    26        Unassigned
    27        NSW User System FE
    28        Unassigned
    29        MSG ICP
    30        Unassigned
    31        MSG Authentication
    32        Unassigned
    33        Display Support Protocol
    34        Unassigned
    35        any private printer server
    36        Unassigned
    37        Time
    38        Route Access Protocol
    39        Resource Location Protocol
    40        Unassigned
    41        Graphics
    42        Host Name Server
    43        Who Is
    44        MPM FLAGS Protocol
    45        Message Processing Module [recv]
    46        MPM [default send]
    47        NI FTP
    48        Digital Audit Daemon
    49        Login Host Protocol
    50        Remote Mail Checking Protocol
    51        IMP Logical Address Maintenance
    52        XNS Time Protocol
    53        Domain Name Server
    54        XNS Clearinghouse
    55        ISI Graphics Language
    56        XNS Authentication
    57        any private terminal access
    58        XNS Mail
    59        any private file service
    60        Unassigned
    61        NI MAIL
    62        ACA Services
    63        Unassigned
    64        Communications Integrator (CI)
    65        TACACS-Database Service
    66        Oracle SQL*NET
    67        Bootstrap Protocol Server
    68        Bootstrap Protocol Client
    69        Trivial File Transfer
    70        Gopher
    71        Remote Job Service
    72        Remote Job Service
    73        Remote Job Service
    74        Remote Job Service
    75        any private dial out service
    76        Distributed External Object Store
    77        any private RJE service
    78        vettcp
    79        Finger
    80        World Wide Web HTTP
    81        HOSTS2 Name Server
    82        XFER Utility
    83        MIT ML Device
    84        Common Trace Facility
    85        MIT ML Device
    86        Micro Focus Cobol
    87        any private terminal link
    88        Kerberos
    89        SU/MIT Telnet Gateway
    90        DNSIX Securit Attribute Token Map
    91        MIT Dover Spooler
    92        Network Printing Protocol
    93        Device Control Protocol
    94        Tivoli Object Dispatcher
    95        SUPDUP
    96        DIXIE Protocol Specification
    97        Swift Remote Vitural File Protocol
    98        TAC News
    99        Metagram Relay
   100        [unauthorized use]
   101        NIC Host Name Server
   102        ISO-TSAP
   103        Genesis Point-to-Point Trans Net
   104        ACR-NEMA Digital Imag. & Comm. 300
   105        Mailbox Name Nameserver
   106        3COM-TSMUX
   107        Remote Telnet Service
   108        SNA Gateway Access Server
   109        Post Office Protocol - Version 2
   110        Post Office Protocol - Version 3
   111        SUN Remote Procedure Call
   112        McIDAS Data Transmission Protocol
   113        Authentication Service
   114        Audio News Multicast
   115        Simple File Transfer Protocol
   116        ANSA REX Notify
   117        UUCP Path Service
   118        SQL Services
   119        Network News Transfer Protocol
   120        CFDPTKT
   121        Encore Expedited Remote Pro.Call
   122        SMAKYNET
   123        Network Time Protocol
   124        ANSA REX Trader
   125        Locus PC-Interface Net Map Ser
   126        Unisys Unitary Login
   127        Locus PC-Interface Conn Server
   128        GSS X License Verification
   129        Password Generator Protocol
   130        cisco FNATIVE
   131        cisco TNATIVE
   132        cisco SYSMAINT
   133        Statistics Service
   134        INGRES-NET Service
   135        Location Service
   136        PROFILE Naming System
   137        NETBIOS Name Service
   138        NETBIOS Datagram Service
   139        NETBIOS Session Service
   140        EMFIS Data Service
   141        EMFIS Control Service
   142        Britton-Lee IDM
   143        Interim Mail Access Protocol v2
   144        NewS
   145        UAAC Protocol
   146        ISO-IP0
   147        ISO-IP
   148        CRONUS-SUPPORT
   149        AED 512 Emulation Service
   150        SQL-NET
   151        HEMS
   152        Background File Transfer Program
   153        SGMP
   154        NETSC
   155        NETSC
   156        SQL Service
   157        KNET/VM Command/Message Protocol
   158        PCMail Server
   159        NSS-Routing
   160        SGMP-TRAPS
   161        SNMP
   162        SNMPTRAP
   163        CMIP/TCP Manager
   164        CMIP/TCP Agent
   165        Xerox
   166        Sirius Systems
   167        NAMP
   168        RSVD
   169        SEND
   170        Network PostScript
   171        Network Innovations Multiplex
   172        Network Innovations CL/1
   173        Xyplex
   174        MAILQ
   175        VMNET
   176        GENRAD-MUX
   177        X Display Manager Control Protocol
   178        NextStep Window Server
   179        Border Gateway Protocol
   180        Intergraph
   181        Unify
   182        Unisys Audit SITP
   183        OCBinder
   184        OCServer
   185        Remote-KIS
   186        KIS Protocol
   187        Application Communication Interface
   188        Plus Five's MUMPS
   189        Queued File Transport
   190        Gateway Access Control Protocol
   191        Prospero Directory Service
   192        OSU Network Monitoring System
   193        Spider Remote Monitoring Protocol
   194        Internet Relay Chat Protocol
   195        DNSIX Network Level Module Audit
   196        DNSIX Session Mgt Module Audit Redir
   197        Directory Location Service
   198        Directory Location Service Monitor
   199        SMUX
   200        IBM System Resource Controller
   201        AppleTalk Routing Maintenance
   202        AppleTalk Name Binding
   203        AppleTalk Unused
   204        AppleTalk Echo
   205        AppleTalk Unused
   206        AppleTalk Zone Information
   207        AppleTalk Unused
   208        AppleTalk Unused
   209        Trivial Authenticated Mail Protocol
   210        ANSI Z39.50
   211        Texas Instruments 914C/G Terminal
   212        ATEXSSTR
   213        IPX
   214        VM PWSCS
   215        Insignia Solutions
   216        Access Technology License Server
   217        dBASE Unix
   218        Netix Message Posting Protocol
   219        Unisys ARPs
   220        Interactive Mail Access Protocol v3
   221        Berkeley rlogind with SPX auth
   222        Berkeley rshd with SPX auth
   223        Certificate Distribution Center
   242        Unassigned
   243        Survey Measurement
   244        Unassigned
   245        LINK
   246        Display Systems Protocol
   247        Reserved
   344        Prospero Data Access Protocol
   345        Perf Analysis Workbench
   346        Zebra server
   347        Fatmen Server
   348        Cabletron Management Protocol
  
   349-370    Unassigned
   
   371        Clearcase
   372        Unix Listserv
   373        Legent Corporation
   374        Legent Corporation
   375        Hassle
   376        Amiga Envoy Network Inquiry Proto
   377        NEC Corporation
   378        NEC Corporation
   379        TIA/EIA/IS-99 modem client
   380        TIA/EIA/IS-99 modem server
   381        hp performance data collector
   382        hp performance data managed node
   383        hp performance data alarm manager
   384        A Remote Network Server System
   385        IBM Application
   386        ASA Message Router Object Def.
   387        Appletalk Update-Based Routing Pro.
   388        Unidata LDM Version 4
   389        Lightweight Directory Access Protocol
   390        UIS
   391        SynOptics SNMP Relay Port
   392        SynOptics Port Broker Port
   393        Data Interpretation System
   394        EMBL Nucleic Data Transfer
   395        NETscout Control Protocol
   396        Novell Netware over IP
   397        Multi Protocol Trans. Net.
   398        Kryptolan
   399        Unassigned
   400        Workstation Solutions
   401        Uninterruptible Power Supply
   402        Genie Protocol
   403        decap
   404        nced
   405        ncld
   406        Interactive Mail Support Protocol
   407        Timbuktu
   408        Prospero Resource Manager Sys. Man.
   409        Prospero Resource Manager Node Man.
   410        DECLadebug Remote Debug Protocol
   411        Remote MT Protocol
   412        Trap Convention Port
   413        SMSP
   414        InfoSeek
   415        BNet
   416        Silverplatter
   417        Onmux
   418        Hyper-G
   419        Ariel
   420        SMPTE
   421        Ariel
   422        Ariel
   423        IBM Operations Planning and Control Start
   424        IBM Operations Planning and Control Track
   425        ICAD
   426        smartsdp
   427        Server Location
   428        OCS_CMU
   429        OCS_AMU
   430        UTMPSD
   431        UTMPCD
   432        IASD
   433        NNSP
   434        MobileIP-Agent
   435        MobilIP-MN
   436        DNA-CML
   437        comscm
   438        dsfgw
   439        dasp      tommy@inlab.m.eunet.de
   440        sgcp
   441        decvms-sysmgt
   442        cvc_hostd
   443        https  MCom
   444        Simple Network Paging Protocol
   445        Microsoft-DS
   446        DDM-RDB
   447        DDM-RFM
   448        DDM-BYTE
   449        AS Server Mapper
   450        TServer
  
   451-511    Unassigned
   
   512/tcp    remote process execution; authentication performed using
              passwords and UNIX loppgin names
   512/udp    used by mail system to notify users of new mail received; 
              currently receives messages only from
              processes on the same machine
   513/tcp    remote login a la telnet;
              automatic authentication performed
              based on priviledged port numbers
              and distributed data bases which
              identify "authentication domains"
   513/udp    maintains data bases showing who's
              logged in to machines on a local
              net and the load average of the
              machine
   514/tcp    like exec, but automatic
              authentication is performed as for
              login server
   514/udp
   515/tcp    spooler
   515/udp    spooler
   516/tcp    Unassigned
   516/udp    Unassigned
   517/tcp    like tenex link, but across
              machine - unfortunately, doesn't
              use link protocol (this is actually
              just a rendezvous port from which a
              tcp connection is established)
   517/udp    like tenex link, but across
              machine - unfortunately, doesn't
              use link protocol (this is actually
              just a rendezvous port from which a
              tcp connection is established)
   518/tcp
   518/udp
   519/tcp    unixtime
   519/udp    unixtime
   520/tcp    extended file name server
   520/udp    local routing process (on site);
              uses variant of Xerox NS routing
              information protocol
  
   521-524    Unassigned
   
   525        timeserver
   526        newdate
  
   527-529    Unassigned
   
   530        rpc
   531        chat
   532        readnews
   533        for emergency broadcasts
   
   534-538    Unassigned
   
   539        Apertus Technologies Load Determination
   540        uucpd
   541        uucp-rlogin  sl@wimsey.com
   542        Unassigned
   543
   544        krcmd
   550        new-who
   550        new-who
   
   551-555    Unassigned
   
   556        rfs server
   
   557-559    Unassigned
   
   560        rmonitord
   561
   562        chcmd
   563        Unassigned
   564        plan 9 file service
   565        whoami
   
   566-569    Unassigned
  
   570        demon
   571        udemon
  
   572-599    Unassigned
   
   600        Sun IPC server
   607        nqs
   606        Cray Unified Resource Manager
   608        Sender-Initiated/Unsolicited File Transfer
   609        npmp-trap
   610        npmp-local
   611        npmp-gui
   634        ginad
   666
   666        doom Id Software
   704        errlog copy/server daemon
   709        EntrustManager
   729        IBM NetView DM/6000 Server/Client
   730        IBM NetView DM/6000 send/tcp
   731        IBM NetView DM/6000 receive/tcp
   741        netGW
   742        Network based Rev. Cont. Sys.
   744        Flexible License Manager
   747        Fujitsu Device Control
   748        Russell Info Sci Calendar Manager
   749        kerberos administration
   750
   751
   752
   753
   754        send
   758
   759
   760
   761
   762
   763
   764
   765
   767        phone
   766
   769
   770
   771
   772
   773
   774
   775
   776
   780
   786        Concert
   800
   801
   996        Central Point Software
   997
   998
   999
   999        Applix ac
   1000
   1023       Reserved
   1024       Reserved
    
   =====================================================================

Assigned Internet Protocol Numbers:

    Decimal    Keyword     Protocol 
    -------    -------     --------
         0                 Reserved (internet pseudo-protocol number)
         1     ICMP        Internet Control Message    
         2     IGMP        Internet Group Management   
         3     GGP         Gateway-to-Gateway          
         4     IP          IP in IP (encasulation)          
         5     ST          Stream                
         6     TCP         Transmission Control  
         7     UCL         UCL                              
         8     EGP         Exterior Gateway Protocol    
         9     IGP         any private interior gateway     
        10     BBN-RCC-MON BBN RCC Monitoring               
        11     NVP-II      Network Voice Protocol       
        12     PUP         PUP                          
        13     ARGUS       ARGUS                            
        14     EMCON       EMCON                            
        15     XNET        Cross Net Debugger           
        16     CHAOS       Chaos                            
        17     UDP         User Datagram                
        18     MUX         Multiplexing                 
        19     DCN-MEAS    DCN Measurement Subsystems       
        20     HMP         Host Monitoring              
        21     PRM         Packet Radio Measurement         
        22     XNS-IDP     XEROX NS IDP              
        23     TRUNK-1     Trunk-1                          
        24     TRUNK-2     Trunk-2                          
        25     LEAF-1      Leaf-1                           
        26     LEAF-2      Leaf-2                           
        27     RDP         Reliable Data Protocol    
        28     IRTP        Internet Reliable Transaction 
        29     ISO-TP4     ISO Transport Protocol Class 4
        30     NETBLT      Bulk Data Transfer Protocol   
        31     MFE-NSP     MFE Network Services Protocol 
        32     MERIT-INP   MERIT Internodal Protocol        
        33     SEP         Sequential Exchange Protocol     
        34     3PC         Third Party Connect Protocol     
        35     IDPR        Inter-Domain Policy Routing Protocol
        36     XTP         XTP                                 
        37     DDP         Datagram Delivery Protocol          
        38     IDPR-CMTP   IDPR Control Message Transport Proto
        39     TP++        TP++ Transport Protocol             
        40     IL          IL Transport Protocol               
        41     SIP         Simple Internet Protocol            
        42     SDRP        Source Demand Routing Protocol      
        43     SIP-SR      SIP Source Route                    
        44     SIP-FRAG    SIP Fragment                        
        45     IDRP        Inter-Domain Routing Protocol 
        46     RSVP        Reservation Protocol          
        47     GRE         General Routing Encapsulation 
        48     MHRP        Mobile Host Routing Protocol
        49     BNA         BNA                         
        50     SIPP-ESP    SIPP Encap Security Payload 
        51     SIPP-AH     SIPP Authentication Header  
        52     I-NLSP      Integrated Net Layer Security  TUBA 
        53     SWIPE       IP with Encryption                  
        54     NHRP        NBMA Next Hop Resolution Protocol
     55-60                 Unassigned                          
        61                 any host internal protocol          
        62     CFTP        CFTP                         
        63                 any local network                   
        64     SAT-EXPAK   SATNET and Backroom EXPAK           
        65     KRYPTOLAN   Kryptolan                           
        66     RVD         MIT Remote Virtual Disk Protocol    
        67     IPPC        Internet Pluribus Packet Core       
        68                 any distributed file system         
        69     SAT-MON     SATNET Monitoring                   
        70     VISA        VISA Protocol                       
        71     IPCV        Internet Packet Core Utility        
        72     CPNX        Computer Protocol Network Executive 
        73     CPHB        Computer Protocol Heart Beat        
        74     WSN         Wang Span Network                   
        75     PVP         Packet Video Protocol               
        76     BR-SAT-MON  Backroom SATNET Monitoring          
        77     SUN-ND      SUN ND PROTOCOL-Temporary           
        78     WB-MON      WIDEBAND Monitoring                 
        79     WB-EXPAK    WIDEBAND EXPAK                      
        80     ISO-IP      ISO Internet Protocol               
        81     VMTP        VMTP                                
        82     SECURE-VMTP SECURE-VMTP                         
        83     VINES       VINES                               
        84     TTP         TTP                                 
        85     NSFNET-IGP  NSFNET-IGP                          
        86     DGP         Dissimilar Gateway Protocol  
        87     TCF         TCF                                 
        88     IGRP        IGRP                         
        89     OSPFIGP     OSPFIGP                     
        90     Sprite-RPC  Sprite RPC Protocol         
        91     LARP        Locus Address Resolution Protocol   
        92     MTP         Multicast Transport Protocol        
        93     AX.25       AX.25 Frames                        
        94     IPIP        IP-within-IP Encapsulation Protocol 
        95     MICP        Mobile Internetworking Control Pro. 
        96     SCC-SP      Semaphore Communications Sec. Pro.  
        97     ETHERIP     Ethernet-within-IP Encapsulation    
        98     ENCAP       Encapsulation Header        
        99                 any private encryption scheme       
       100     GMTP        GMTP                                
   101-254                 Unassigned                          
       255                 Reserved                            

    =====================================================================

HEX Number Table:

             MSB             BIT2             BIT3            LSB
    ---------------------------------------------------------------------
    LS  _|   8               4                2               1
    Byte |   128             64               32              16
             2048            1024             512             256
             32,768          16,384           8,192           4,096
             524,288         262,144          131,072         65,536
             8,388,608       4,194,304        2,097,152       1,048,576
    MS  _|   134,217,728     67,108,864       33,554,432      16,777,216
    Byte |   2,147,483,648   1,073,744,824    536,870,912     268,435,456
    
    =====================================================================

Ethernet Frame Structures:

    Ethernet
    --------
    Field length
     (in bytes):          7    1    6      6    2      46-1500        4
                     .-----------------------------------...------------.
                     |Preamble|S|Dest. |Source| T|                 |    |
                     |        |O|Addr. | Addr.| y|     [DATA]      |FCS |
                     |        |F|      |      | p|                 | CRC|
                     |        | |      |      | e|                 |    |
                     `-----------------------------------...------------'
    
    IEEE 802.3 Frame Structure
    --------------------------
    Field length
     (in bytes):          7    1    6      6    2      46-1500        4
                     .-----------------------------------...------------.
                     |Preamble|S|Dest. |Source| L|                 |    |
                     |        |O|Addr. | Addr.|en|  [802.2 header  |FCS |
                     |        |F|      |      |gt|     and DATA]   | CRC|
                     |        | |      |      | h|                 |    |
                     `-----------------------------------...------------'
    
    =====================================================================

Commonly Used Ethernet Protocol Types:

    Decimal   Hex           Description         
    -------   ---------     -----------          
        000   0000-05DC     IEEE 802.3 Length Field   
        257   0101-01FF     Experimental             
        512   0200          XEROX PUP (see 0A00) 
        513   0201          PUP Addr Trans (see 0A01)
              0400          Nixdorf                  
       1536   0600          XEROX NS IDP         
              0660          DLOG                     
              0661          DLOG                     
       2048   0800          Internet IP (IPv4)   
       2049   0801          X.75 Internet            
       2050   0802          NBS Internet             
       2051   0803          ECMA Internet            
       2052   0804          Chaosnet                 
       2053   0805          X.25 Level 3             
       2054   0806          ARP                  
       2055   0807          XNS Compatability        
       2076   081C          Symbolics Private        
       2184   0888-088A     Xyplex                   
       2304   0900          Ungermann-Bass net debugr
       2560   0A00          Xerox IEEE802.3 PUP      
       2561   0A01          PUP Addr Trans           
       2989   0BAD          Banyan Systems           
       4096   1000          Berkeley Trailer nego    
       4097   1001-100F     Berkeley Trailer encap/IP
       5632   1600          Valid Systems            
      16962   4242          PCS Basic Block Protocol 
      21000   5208          BBN Simnet               
      24576   6000          DEC Unassigned (Exp.)    
      24577   6001          DEC MOP Dump/Load        
      24578   6002          DEC MOP Remote Console   
      24579   6003          DEC DECNET Phase IV Route
      24580   6004          DEC LAT                  
      24581   6005          DEC Diagnostic Protocol  
      24582   6006          DEC Customer Protocol    
      24583   6007          DEC LAVC, SCA            
      24584   6008-6009     DEC Unassigned           
      24586   6010-6014     3Com Corporation         
      28672   7000          Ungermann-Bass download  
      28674   7002          Ungermann-Bass dia/loop  
      28704   7020-7029     LRT                      
      28720   7030          Proteon                  
      28724   7034          Cabletron                
      32771   8003          Cronus VLN           
      32772   8004          Cronus Direct        
      32773   8005          HP Probe                 
      32774   8006          Nestar                   
      32776   8008          AT&T                     
      32784   8010          Excelan                  
      32787   8013          SGI diagnostics          
      32788   8014          SGI network games        
      32789   8015          SGI reserved             
      32790   8016          SGI bounce server        
      32793   8019          Apollo Computers         
      32815   802E          Tymshare                 
      32816   802F          Tigan, Inc.              
      32821   8035          Reverse ARP          
      32822   8036          Aeonic Systems           
      32824   8038          DEC LANBridge            
      32825   8039-803C     DEC Unassigned           
      32829   803D          DEC Ethernet Encryption  
      32830   803E          DEC Unassigned           
      32831   803F          DEC LAN Traffic Monitor  
      32832   8040-8042     DEC Unassigned           
      32836   8044          Planning Research Corp.  
      32838   8046          AT&T                     
      32839   8047          AT&T                     
      32841   8049          ExperData                
      32859   805B          Stanford V Kernel exp.   
      32860   805C          Stanford V Kernel prod.  
      32861   805D          Evans & Sutherland       
      32864   8060          Little Machines          
      32866   8062          Counterpoint Computers   
      32869   8065          Univ. of Mass. @ Amherst 
      32870   8066          Univ. of Mass. @ Amherst 
      32871   8067          Veeco Integrated Auto.   
      32872   8068          General Dynamics         
      32873   8069          AT&T                     
      32874   806A          Autophon                 
      32876   806C          ComDesign                
      32877   806D          Computgraphic Corp.      
      32878   806E-8077     Landmark Graphics Corp.  
      32890   807A          Matra                    
      32891   807B          Dansk Data Elektronik    
      32892   807C          Merit Internodal         
      32893   807D-807F     Vitalink Communications  
      32896   8080          Vitalink TransLAN III    
      32897   8081-8083     Counterpoint Computers   
      32923   809B          Appletalk                
      32924   809C-809E     Datability               
      32927   809F          Spider Systems Ltd.      
      32931   80A3          Nixdorf Computers        
      32932   80A4-80B3     Siemens Gammasonics Inc. 
      32960   80C0-80C3     DCA Data Exchange Cluster
              80C4          Banyan Systems           
              80C5          Banyan Systems           
      32966   80C6          Pacer Software           
      32967   80C7          Applitek Corporation     
      32968   80C8-80CC     Intergraph Corporation   
      32973   80CD-80CE     Harris Corporation       
      32975   80CF-80D2     Taylor Instrument        
      32979   80D3-80D4     Rosemount Corporation    
      32981   80D5          IBM SNA Service on Ether 
      32989   80DD          Varian Associates        
      32990   80DE-80DF     Integrated Solutions TRFS
      32992   80E0-80E3     Allen-Bradley            
      32996   80E4-80F0     Datability               
      33010   80F2          Retix                    
      33011   80F3          AppleTalk AARP (Kinetics)
      33012   80F4-80F5     Kinetics                 
      33015   80F7          Apollo Computer          
      33023   80FF-8103     Wellfleet Communications 
      33031   8107-8109     Symbolics Private        
      33072   8130          Hayes Microcomputers     
      33073   8131          VG Laboratory Systems    
              8132-8136     Bridge Communications    
      33079   8137-8138     Novell, Inc.             
      33081   8139-813D     KTI                      
              8148          Logicraft                
              8149          Network Computing Devices
              814A          Alpha Micro              
      33100   814C          SNMP                     
              814D          BIIN                     
              814E          BIIN                     
              814F          Technically Elite Concept
              8150          Rational Corp            
              8151-8153     Qualcomm                 
              815C-815E     Computer Protocol Pty Ltd
              8164-8166     Charles River Data System
              817D-818C     Protocol Engines         
              818D          Motorola Computer        
              819A-81A3     Qualcomm                 
              81A4          ARAI Bunkichi            
              81A5-81AE     RAD Network Devices      
              81B7-81B9     Xyplex                   
              81CC-81D5     Apricot Computers        
              81D6-81DD     Artisoft                 
              81E6-81EF     Polygon                  
              81F0-81F2     Comsat Labs              
              81F3-81F5     SAIC                     
              81F6-81F8     VG Analytical            
              8203-8205     Quantum Software         
              8221-8222     Ascom Banking Systems    
              823E-8240     Advanced Encryption Syste
              827F-8282     Athena Programming       
              8263-826A     Charles River Data System
              829A-829B     Inst Ind Info Tech       
              829C-82AB     Taurus Controls          
              82AC-8693     Walker Richer & Quinn    
              8694-869D     Idea Courier             
              869E-86A1     Computer Network Tech    
              86A3-86AC     Gateway Communications   
              86DB          SECTRA                   
              86DE          Delta Controls           
      34543   86DF          ATOMIC                   
              86E0-86EF     Landis & Gyr Powers      
              8700-8710     Motorola                 
              8A96-8A97     Invisible Software       
      36864   9000          Loopback                 
      36865   9001          3Com(Bridge) XNS Sys Mgmt
      36866   9002          3Com(Bridge) TCP-IP Sys  
      36867   9003          3Com(Bridge) loop detect 
      65280   FF00          BBN VITAL-LanBridge cache
              FF00-FF0F     ISC Bunker Ramo          
The standard for transmission of IP datagrams over Ethernets and Experimental Ethernets is specified in [RFC894] and [RFC895] respectively.


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