Weekly Routing Table Report

Routing Analysis cscora at dev.apnic.net
Thu May 17 14:05:48 EDT 2001


This is an automated weekly mailing describing the state of the Internet
Routing Table as seen from APNIC's router in Japan.
Daily listings are sent to bgp-stats at lists.apnic.net

For a graphical representation, please see http://www.apnic.net/stats/bgp.

If you have any comments please contact Philip Smith <pfs at cisco.com>.

Routing Table Report   18 May, 2001

Analysis Summary
----------------

BGP routing table entries examined:                            106302
Origin ASes present in the Internet Routing Table:              10868
Origin ASes announcing only one prefix:                          3970
Transit ASes present in the Internet Routing Table:              1434
Average AS path length visible in the Internet Routing Table:     5.3
    Max AS path length visible:                                    16
Illegal AS announcements present in the Routing Table:             19
Non-routable prefixes present in the Routing Table:                 0
Prefixes being announced from the IANA Reserved Address blocks:     1
Number of addresses announced to Internet:                 1230918418
    Equivalent to 73 /8s, 94 /16s and 83 /24s
    Percentage of available address space announced:             33.2
    Percentage of allocated address space announced:             64.0
    Percentage of available address space allocated:             51.9

APNIC Region Analysis Summary
-----------------------------

Prefixes being announced by APNIC Region ASes:                  15978
Prefixes being announced from the APNIC address blocks:         14530
APNIC Region origin ASes present in the Internet Routing Table:  1248
APNIC Region origin ASes announcing only one prefix:              442
APNIC Region transit ASes present in the Internet Routing Table:  205
Average APNIC Region AS path length visible:                      5.1
    Max APNIC Region AS path length visible:                       15
Number of APNIC addresses announced to Internet:             72191777
    Equivalent to 4 /8s, 77 /16s and 143 /24s
    Percentage of available APNIC address space announced:       71.0

APNIC AS Blocks        4608 - 4864, 7467 - 7722, 9216 - 10239, 17408 - 18431
APNIC Address Blocks   61/8, 202/7, 210/7 and 218/8

ARIN Region Analysis Summary
----------------------------

Prefixes being announced by ARIN Region ASes:                   73572
Prefixes being announced from the ARIN address blocks:          50747
ARIN Region origin ASes present in the Internet Routing Table:   6618
ARIN Region origin ASes announcing only one prefix:              1985
ARIN Region transit ASes present in the Internet Routing Table:   686
Average ARIN Region AS path length visible:                       5.2
    Max ARIN Region AS path length visible:                        16
Number of ARIN addresses announced to Internet:             200075426
    Equivalent to 11 /8s, 236 /16s and 232 /24s
    Percentage of available ARIN address space announced:        91.7

ARIN AS Blocks         1 - 1876, 1902 - 2042, 2044 - 2046, 2048 - 2106
                       2138 - 2584, 2615 - 2772, 2823 - 2829, 2880 - 3153
                       3354 - 4607, 4865 - 5119, 5632 - 6655, 6912 - 7466
                       7723 - 8191, 10240 - 12287, 13312 - 15359
                       16384 - 17407, 18432 - 20479
ARIN Address Blocks    63/8, 64/7, 66/8, 199/8, 200/8, 204/6, 208/7 and 216/8

RIPE Region Analysis Summary
----------------------------

Prefixes being announced by RIPE Region ASes:                   16733
Prefixes being announced from the RIPE address blocks:          13079
RIPE Region origin ASes present in the Internet Routing Table:   3000
RIPE Region origin ASes announcing only one prefix:              1539
RIPE Region transit ASes present in the Internet Routing Table:   541
Average RIPE Region AS path length visible:                       5.9
    Max RIPE Region AS path length visible:                        16
Number of RIPE addresses announced to Internet:              98389962
    Equivalent to 5 /8s, 221 /16s and 79 /24s
    Percentage of available RIPE address space announced:        65.2

RIPE AS Blocks         1877 - 1901, 2042, 2047, 2107 - 2136, 2585 - 2614
                       2773 - 2822, 2830 - 2879, 3154 - 3353, 5377 - 5631
                       6656 - 6911, 8192 - 9215, 12288 - 13311, 15360 - 16383
                       20480 - 21503
RIPE Address Blocks    62/8, 80/7, 193/8, 194/7, 212/7 and 217/8

APNIC Region per AS prefix count summary
----------------------------------------

  ASN   No of nets  /19 equiv  Description
 1221     1743        665       Telstra
 2764      875        172       connect.com.au pty ltd
  703      382        206       UUNET Technologies, Inc.
 2907      364        884       SINET Japan
 4755      327        110       VSNL India
 4538      241       1048       China Education and Research 
 7539      214         97       Delegated to TWNIC for subseq
 4134      195        635       Data Communications Bureau
 7474      191         86       Optus Communications
 7657      183         13       The Internet Group Limited
 7545      156         11       TPG Internet Pty Ltd
 4740      151          9       Ozemail
17561      151         68       Internet service provision to
 1237      149         50       System Engineering Research I
 4766      148        681       KORnet Powered BY Korea Telec
 4786      126          7       NetConnect Communications Pty
 9443      124         23       INTERNETPRIMUS-AS-A
 7586      121          9       Paradox Digital Pty. Ltd
 4736      120         17       Magna Data
 7617      120         46       One.Net Pty Ltd

RIPE Region per AS prefix count summary
---------------------------------------

  ASN   No of nets  /19 equiv  Description
  702      591        833       UUNET Technologies, Inc.
15870      450          3       Global Center Frankfurt
 3301      392        401       TeliaNet Sweden
 1257      278        263       Swipnet AB
 1270      268        440       UUNET Germany
  680      215        970       Deutschef Forschurgsnetz
 3215      211        231       RAIN
  719      186        146       LANLINK
  786      185        952       JANET IP Service
 5515      173        318       Sonera Finland
 3320      163        709       Deutsche Telekom AG
 5400      132         34       Concert Internet Plus Europea
  517      128        136       Xlink
 3303      126        296       Swisscom
 8708      120          7       Romania Data System
 2856      118        396       BTnet UK Regional network
 1267      100        978       IUnet S.p.A
 1290       98        203       PSINet UK Ltd.
 1901       91         69       EUnet Austria
 3269       86        278       TELECOM ITALIA

ARIN Region per AS prefix count summary
---------------------------------------

  ASN   No of nets  /19 equiv  Description
  701     2364       3781       UUNET Technologies, Inc.
  705     1157         54       UUNET Technologies, Inc.
 7018     1026       3306       AT&T
    1      948       4464       BBN Planet
 7046      804       2612       UUNET Technologies, Inc.
 3491      678        180       CAIS Internet
 1239      637       1597       Sprint ICM-Inria
 2914      594       1181       Verio, Inc.
 3561      542       1208       Cable & Wireless USA
 4293      485         42       Cable & Wireless USA
18994      480          5       Global Crossing 
  690      472         47       Merit Network
  209      454        797       Qwest
 2548      405        506       Digital Express Group, Inc.
 3908      386        265       Supernet, Inc.
  174      368       2614       PSINet Inc.
 3602      358         73       Sprint Canada
 3549      349        526       Global Crossing
 4323      340        140       Time Warner Communications, I
 3967      338        227       Exodus Communication

Global Per AS prefix count summary
----------------------------------

  ASN   No of nets  /19 equiv  Description
  701     2364       3781       UUNET Technologies, Inc.
 1221     1743        665       Telstra
  705     1157         54       UUNET Technologies, Inc.
 7018     1026       3306       AT&T
    1      948       4464       BBN Planet
 2764      875        172       connect.com.au pty ltd
 7046      804       2612       UUNET Technologies, Inc.
 3491      678        180       CAIS Internet
 1239      637       1597       Sprint ICM-Inria
 2914      594       1181       Verio, Inc.
  702      591        833       UUNET Technologies, Inc.
 3561      542       1208       Cable & Wireless USA
 4293      485         42       Cable & Wireless USA
18994      480          5       Global Crossing 
  690      472         47       Merit Network
  209      454        797       Qwest
15870      450          3       Global Center Frankfurt
 2548      405        506       Digital Express Group, Inc.
 3301      392        401       TeliaNet Sweden
 3908      386        265       Supernet, Inc.

List of Unregistered ASNs (Global)
----------------------------------

Bad AS  Designation  Network              Transit AS  Description
 2027   UNALLOCATED   150.185.128.0/18      8143       Publicom Corp.
 1877   UNALLOCATED   192.108.196.0/24      1800       SPRINT
 1877   UNALLOCATED   192.108.209.0/24      1880       Stupi, house man's 
 1877   UNALLOCATED   192.108.210.0/24      1880       Stupi, house man's 
 1877   UNALLOCATED   192.108.214.0/24      1800       SPRINT
 5757   UNALLOCATED   192.239.13.0/24        701       UUNET Technologies, 
65527   PRIVATE       195.138.163.0/24      6221       US Cybersites, Inc
17441   UNALLOCATED   203.131.192.0/24      6347       SAVVIS Communication
65502   PRIVATE       203.166.83.0/24      10084       Western Australian I
65500   PRIVATE       203.166.86.0/24      10084       Western Australian I
 5555   UNALLOCATED   205.110.64.0/24        721       DLA Systems Automati
 5555   UNALLOCATED   205.110.68.0/22        721       DLA Systems Automati
 5555   UNALLOCATED   205.110.72.0/21        721       DLA Systems Automati
65527   PRIVATE       206.98.236.0/24       6221       US Cybersites, Inc
 5757   UNALLOCATED   207.19.224.0/24        701       UUNET Technologies, 
65527   PRIVATE       208.130.10.0/24       6221       US Cybersites, Inc
65527   PRIVATE       208.140.136.0/21      6221       US Cybersites, Inc
65527   PRIVATE       208.140.170.0/24      6221       US Cybersites, Inc
65527   PRIVATE       208.140.174.0/23      6221       US Cybersites, Inc

Advertised IANA Reserved Addresses
----------------------------------

Network            Origin AS  Description
201.115.100.0/24      7018     AT&T

Number of prefixes announced per prefix length (Global)
-------------------------------------------------------

 /1:0        /2:0        /3:0        /4:0        /5:0        /6:0       
 /7:0        /8:20       /9:5       /10:6       /11:9       /12:31      
/13:73      /14:203     /15:346     /16:6936    /17:1167    /18:2138    
/19:6650    /20:5201    /21:4529    /22:6813    /23:8705    /24:61097   
/25:265     /26:455     /27:449     /28:463     /29:380     /30:296     
/31:1       /32:64      

Number of /24s announced per /8 block (Global)
----------------------------------------------

   9:3        12:362      13:10       15:1        17:2        24:690    
  26:1        32:13       38:576      44:3        47:1        53:2      
  55:1        57:11       61:32       62:121      63:1955     64:1670   
  65:568      66:318     128:43      129:106     130:23      131:36     
 132:9       133:1       134:169     135:11      136:16      137:122    
 138:245     139:47      140:139     141:165     142:63      143:41     
 144:139     145:9       146:137     147:135     148:93      149:124    
 150:27      151:300     152:629     153:32      154:18      155:80     
 156:47      157:106     158:178     159:76      160:27      161:56     
 162:62      163:135     164:95      165:119     166:175     167:139    
 168:82      169:35      170:266     171:2       192:5447    193:1956   
 194:2067    195:774     196:403     198:3658    199:3394    200:2051   
 201:1       202:2521    203:4981    204:3358    205:2265    206:2835   
 207:2903    208:2961    209:3153    210:746     211:159     212:877    
 213:413     214:9       215:12      216:3023    217:231    

End of report



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