Weekly Routing Table Report

Routing Table Analysis cscora at thyme.apnic.net
Fri Mar 22 05:05:00 EST 2002


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   20:00 +10GMT Fri 22 Mar, 2002

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

BGP routing table entries examined:                            109956
    Prefixes after maximum aggregation:                         72203
    Unique aggregates announced to Internet:                    52252
Total ASes present in the Internet Routing Table:               12779
Origin-only ASes present in the Internet Routing Table:         11065
Origin ASes announcing only one prefix:                          4843
Transit ASes present in the Internet Routing Table:              1714
Transit-only ASes present in the Internet Routing Table:           55
Average AS path length visible in the Internet Routing Table:     5.4
    Max AS path length visible:                                    19
Illegal AS announcements present in the Routing Table:              6
Non-routable prefixes present in the Routing Table:                 0
Prefixes being announced from the IANA Reserved Address blocks:    14
Number of addresses announced to Internet:                 1168580328
    Equivalent to 69 /8s, 167 /16s and 30 /24s
    Percentage of available address space announced:             31.5
    Percentage of allocated address space announced:             59.7
    Percentage of available address space allocated:             52.8
Total number of prefixes smaller than registry allocations:     73621

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

Prefixes being announced by APNIC Region ASes:                  18137
    Total APNIC prefixes after maximum aggregation:             10698
Prefixes being announced from the APNIC address blocks:         16655
    Unique aggregates announced from the APNIC address blocks:  10053
APNIC Region origin ASes present in the Internet Routing Table:  1470
APNIC Region origin ASes announcing only one prefix:              477
APNIC Region transit ASes present in the Internet Routing Table:  259
Average APNIC Region AS path length visible:                      5.3
    Max APNIC Region AS path length visible:                       15
Number of APNIC addresses announced to Internet:             82062400
    Equivalent to 4 /8s, 228 /16s and 44 /24s
    Percentage of available APNIC address space announced:       60.7

APNIC AS Blocks        4608 - 4864, 7467 - 7722, 9216 - 10239
                       17408 - 18431, 23552 - 24575
APNIC Address Blocks   61/8, 202/7, 210/7, 218/7 and 220/8

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

Prefixes being announced by ARIN Region ASes:                   73404
    Total ARIN prefixes after maximum aggregation:              47340
Prefixes being announced from the ARIN address blocks:          51865
    Unique aggregates announced from the ARIN address blocks:   16357
ARIN Region origin ASes present in the Internet Routing Table:   7566
ARIN Region origin ASes announcing only one prefix:              2384
ARIN Region transit ASes present in the Internet Routing Table:   762
Average ARIN Region AS path length visible:                       5.2
    Max ARIN Region AS path length visible:                        16
Number of ARIN addresses announced to Internet:             190253252
    Equivalent to 11 /8s, 87 /16s and 8 /24s
    Percentage of available ARIN address space announced:        70.9

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, 21504 - 23551
ARIN Address Blocks    24/8, 63/8, 64/6, 68/8, 199/8, 200/8, 204/6,
                       208/7 and 216/8

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

Prefixes being announced by RIPE Region ASes:                   18411
    Total RIPE prefixes after maximum aggregation:              14165
Prefixes being announced from the RIPE address blocks:          15142
    Unique aggregates announced from the RIPE address blocks:   10085
RIPE Region origin ASes present in the Internet Routing Table:   3687
RIPE Region origin ASes announcing only one prefix:              1982
RIPE Region transit ASes present in the Internet Routing Table:   679
Average RIPE Region AS path length visible:                       5.8
    Max RIPE Region AS path length visible:                        19
Number of RIPE addresses announced to Internet:             107780960
    Equivalent to 6 /8s, 108 /16s and 155 /24s
    Percentage of available RIPE address space announced:        71.4

RIPE AS Blocks         1877 - 1901, 2043, 2047, 2107 - 2136, 2585 - 2614
                       2773 - 2822, 2830 - 2879, 3154 - 3353, 5377 - 5631
                       6656 - 6911, 8192 - 9215, 12288 - 13311, 15360 - 16383
                       20480 - 21503, 24576 - 25599
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  /20 equiv  MaxAgg  Description
 1221     1289       1213         952   Telstra Pty Ltd
 4538      462       1194          17   China Education and Research 
  703      409        335         319   UUNET Technologies, Inc. 
 2907      405       1894         370   SINET Japan
 2764      384        361         360   connect.com.au pty ltd
 9394      317        113           4   CHINA RAILWAY Internet(CRNET)
 7474      302        289         206   Optus Communications Pty Ltd
 4755      293        113          85   Videsh Sanchar Nigam Ltd. Aut
 9443      276         44          64   Primus Telecommunications
 4134      272       1962          95   Data Communications Bureau
17557      246         16          94   Pakistan Telecom
 4766      206       1516         146   Korea Internet Exchange for "
 7539      166        239         160   TANet2, sponsored by NSC, TAI
 4804      165         84          68   Microplex PTY LTD
 9583      148         32           5   Satyam Infoway Ltd.,
 9768      138        385          82   Korea Telecom
 7657      122         22          85   The Internet Group Limited
 4713      120        891         104   NTT Communications Corporatio
17676      119       1904          12   XTAGE CORPORATION
 4780      118        186          40   Digital United Inc.

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
  702     1032       2608         848   UUNET Technologies, Inc. 
 3301      394        924         349   TeliaNet Sweden
 3215      265        586         158   France Telecom / &Equant
 5515      262        696         168   Sonera Finland Autonomous Sys
  680      232       2149         231   DFN-IP service G-WiN
 1257      222        464         218   SWIPnet Swedish IP Network
 5400      198         83          93   Concert European Core Network
 3320      197       1964         172   Deutsche Telekom AG
  786      182       1874         182   The JANET IP Service
  719      163        289         118   LANLINK autonomous system
 8708      157         23         145   Romania Data Systems S.A.
 2856      129        788         118   BTnet UK Regional network
 3303      125        581         124   Swisscom Ltd
12302      125          8          46   MobiFon S.A.
 8297      120         53          67   Teleglobe Autonomous System i
 3269      117        694          71   TELECOM ITALIA
  517      103        226          99   KPNQwest Germany GmbH
 9051      101          6          25   INCONET Autonomous System
 5511      100        193          89   France Telecom
 2874       97        100          37   Global One Services AB

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
  701     2106       8368        1495   UUNET Technologies, Inc. 
 7018     1229       7529         914   AT&T 
 3908      848       1675         477   Supernet, Inc. 
    1      810       8123         605   BBN Planet 
 1239      809       3368         634   Sprint 
  852      672       5204         411   Telus Advanced Communications
 4323      624        436         253   Time Warner Communications, I
 7046      605        834         393   UUNET Technologies, Inc. 
  209      555       1992         319   Qwest 
 7132      518        545         158   Southwestern Bell Internet Se
 3549      502        845         257   Global Crossing 
  690      462         69         305   Merit Network 
 2914      414       2169         410   Verio, Inc. 
 7843      398        314          49   Adelphia Corp. 
  705      378        116         270   UUNET Technologies, Inc. 
 2149      377        209         314   Performance Systems, Inc. 
 3741      343        731         233   The Internet Solution 
 6197      330        217         171   BellSouth Network Solutions, 
 3561      318       2151         285   Cable & Wireless USA 
 7066      318        203         251   Virginia Polytechnic Institut

Global Per AS Maximum Aggr summary
----------------------------------

  ASN   No of nets  Net Savings Description
 4538       462         445      China Education and Research 
 3908       848         371      Supernet, Inc. 
 4323       624         371      Time Warner Communications, I
 7132       518         360      Southwestern Bell Internet Se
 7843       398         349      Adelphia Corp. 
 1221      1289         337      Telstra Pty Ltd
 7018      1229         315      AT&T 
 9394       317         313      CHINA RAILWAY Internet(CRNET)
 4151       307         291      USDA 
 6198       310         279      BellSouth Network Solutions, 
11371       277         271      Rhythms NetConnections 
  852       672         261      Telus Advanced Communications
 3549       502         245      Global Crossing 
 6347       316         238      SAVVIS Communications Corpora
  209       555         236      Qwest 
 7029       244         229      Alltel Information Services, 
 7046       605         212      UUNET Technologies, Inc. 
 9443       276         212      Primus Telecommunications
 4755       293         208      Videsh Sanchar Nigam Ltd. Aut
    1       810         205      BBN Planet 

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

Bad AS  Designation  Network              Transit AS  Description
  112   UNALLOCATED   192.175.48.0/24       3557       Vixie Enterprises 
65535   PRIVATE       198.93.230.0/24       3550       Ateneo de Manila Uni
65535   PRIVATE       198.93.231.0/24       3550       Ateneo de Manila Uni
65535   PRIVATE       198.94.168.0/24       3550       Ateneo de Manila Uni
65535   PRIVATE       198.94.169.0/24       3550       Ateneo de Manila Uni
 5757   UNALLOCATED   207.19.224.0/24        701       UUNET Technologies, 

Advertised Unregistered Addresses
---------------------------------

Network            Origin AS  Description
39.0.0.0/8            4554     Exchange Point Blocks 
96.0.0.0/20           3549     Global Crossing 
132.0.0.0/10           568     DISO-UNRRA 
134.137.0.0/16        7170     AT&T Government Markets 
135.0.0.0/13         10455     Lucent Technologies 
137.0.0.0/13           568     DISO-UNRRA 
138.94.0.0/16            1     BBN Planet 
144.7.0.0/16           701     UUNET Technologies, Inc. 
153.36.0.0/14          701     UUNET Technologies, Inc. 
154.150.0.0/16        6494     IDCI 
158.0.0.0/13           568     DISO-UNRRA 
164.233.0.0/16        6020     DISA NETWORK SERVICES 
164.235.0.0/16        6025     US DOD NIC Unregistered
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        /8:19       /9:5       /10:8       /11:14      /12:35      
/13:88      /14:229     /15:404     /16:7180    /17:1388    /18:2555    
/19:7416    /20:6925    /21:4923    /22:7528    /23:9145    /24:61142   
/25:219     /26:259     /27:115     /28:92      /29:102     /30:132     
/31:0       /32:33      

Advertised prefixes smaller than registry allocations
-----------------------------------------------------

  ASN   No of nets  Total ann.   Description
  701     1373          2106      UUNET Technologies, Inc. 
 1221     1147          1289      Telstra Pty Ltd
  702      654          1032      UUNET Technologies, Inc. 
 7018      643          1229      AT&T 
 3908      580           848      Supernet, Inc. 
 4323      495           624      Time Warner Communications, I
 1239      467           809      Sprint 
  690      457           462      Merit Network 
  852      424           672      Telus Advanced Communications
 7046      420           605      UUNET Technologies, Inc. 
    1      403           810      BBN Planet 
  209      365           555      Qwest 
 3549      363           502      Global Crossing 
 2764      340           384      connect.com.au pty ltd
  703      330           409      UUNET Technologies, Inc. 
  705      325           378      UUNET Technologies, Inc. 
 9394      303           317      CHINA RAILWAY Internet(CRNET)
 7066      289           318      Virginia Polytechnic Institut
 2149      286           377      Performance Systems, Inc. 
 6197      279           330      BellSouth Network Solutions, 

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

   3:1         9:1        12:478      13:10       15:2        17:5      
  20:2        24:741      25:1        32:68       38:9        40:6      
  44:1        57:14       61:302      62:166      63:1894     64:1180   
  65:1095     66:812      67:53       68:3        80:221      81:6      
 128:64      129:126     130:23      131:57      132:10      133:3      
 134:128     135:10      136:283     137:102     138:149     139:49     
 140:187     141:90      142:84      143:38      144:145     145:11     
 146:220     147:147     148:135     149:92      150:39      151:50     
 152:326     153:33      154:5       155:90      156:75      157:118    
 158:72      159:125     160:26      161:54      162:139     163:104    
 164:121     165:123     166:221     167:193     168:90      169:51     
 170:292     171:2       192:5441    193:2221    194:2102    195:793    
 196:428     198:3732    199:3199    200:2375    201:1       202:3088   
 203:4559    204:3275    205:2147    206:2496    207:2606    208:2573   
 209:2781    210:581     211:204     212:857     213:594     214:9      
 215:19      216:3016    217:459     218:13     

End of report



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