Internet Domain Survey - Jul 1993

[Mark Lottor <mkl () nisc sri com>]

Network Information Systems Center                                July 1993
SRI International                                    Internet Domain Survey

 The Domain Survey attempts to discover every host on the Internet by doing a
 complete search of the Domain Name System.  The latest results gathered
 during mid-July 1993 are listed.  For more information see RFC 1296; for
 more info see the pub/zone directory on ftp.nisc.sri.com.
                                                          -- Mark Lottor


   Number of Hosts, Domains, and Nets Advertised in the Domain Name System

           July 1993     Apr 93     Jan 93     Oct 92    Jul 92   Change (year)
 ==============================================================================
 Hosts:    1,776,000  1,486,000  1,313,000  1,136,000   992,000       79%

 PingReply:  464,000    421,000
  %ofHosts:      26%        28%

 Domains:     26,000     22,000     21,000     18,100    16,300       59%

 Nets:
  Class A:        67         58         54         52        60       12%
  Class B:      3728       3409       3206       2985      2714       37%
  Class C:      9972       6255       4998       4468      3795      163%
 Total:        13767       9722       8258       7505      6569      110%


                Host Distribution by Top-Level Domain Name

    539668 edu    27033 fi      3165 nz        498 my         19 bg
    460848 com    25151 no      3092 cs        455 si         15 ro
    109550 gov    18305 net     2734 cz        415 tr         13 tn
     91987 de     14746 it      2093 mx        349 su         13 gb
     89788 uk     11741 at      1956 pt        298 ve         10 lv
     88163 mil     8773 es      1802 sg        238 ee          4 aq
     82157 au      7337 za      1728 ie        223 sk          3 ua
     70977 ca      6232 hk      1403 hu        186 lu          2 yu
     39860 fr      6160 dk      1340 us        175 int         2 li
     39359 org     5625 kr      1317 gr        110 in          2 ar
     35639 jp      5469 tw      1259 is        101 ec
     35629 nl      5244 il      1101 br         61 th
     31449 se      4361 be      1073 cl         56 cr
     30697 ch      3511 pl       504 hr         30 cy


                Host Distribution by Top-Level Domain Name
                      of Hosts Responding to a Ping             

    163532 edu     7194 nl       872 il        286 sg         30 ec
     87602 com     6864 se       805 za        214 hu         20 hr
     42431 gov     5297 org      795 hk        128 tr         16 cy
     26462 de      5068 fi       670 pl        123 my          9 lv
     24986 uk      4628 it       551 br        117 si          6 gb
     23865 mil     2809 at       549 gr         70 sk          4 bg
     23479 ca      2259 tw       517 cs         70 ee          3 ro
     13966 jp      2115 es       381 cz         64 ve          2 li
     12713 fr      1907 dk       378 us         64 int         1 yu
     11886 au      1775 kr       329 is         52 in          1 tn
      7943 ch      1217 be       327 cl         40 lu
      7498 net      937 nz       321 pt         38 su
      7320 no       908 mx       300 ie         34 cr


                              Top 50 Host Names

     795 venus     578 mac2      446 mac4      410 titan     381 calvin
     747 pluto     569 charon    443 pc3       401 sirius    378 phoenix
     710 cisco     545 iris      442 alpha     398 fred      378 pc4
     675 mars      539 mercury   434 apollo    394 gateway   378 mac13
     672 gw        524 pc2       426 mac10     393 merlin    375 mac8
     659 zeus      496 mac3      423 mac5      391 hobbes    371 mac14
     640 jupiter   484 orion     419 thor      385 mac6      368 athena
     615 mac1      478 eagle     418 ns        384 mac12     364 mac9
     613 pc1       461 newton    416 hermes    382 mac7      360 mac15
     607 saturn    459 neptune   411 gauss     381 mac11     356 ariel


                Frequently Asked Questions about the Domain Survey

 What do all those domain names stand for?
    See pub/zone/iso-country-codes on ftp.nisc.sri.com.

 Why do only 26% of the advertised hosts answer a ping?
    Many advertised hosts are behind firewalls that only allow email
    to get through.  Technically, they would not be considered hosts
    that are directly on the Internet.  Smaller hosts such as PCs might
    be turned off when they are not in use.  Also, some pings are probably
    lost due to links being down, and/or problems with the pinging process.

 Where can I get more information?
    See the pub/zone directory on ftp.nisc.sri.com.