Weekly Routing Table Report

Routing Table Analysis cscora at thyme.apnic.net
Fri Feb 22 05:04:51 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 Feb, 2002

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

BGP routing table entries examined:                            108511
    Prefixes after maximum aggregation:                         71931
    Unique aggregates announced to Internet:                    51754
Total ASes present in the Internet Routing Table:               12591
Origin-only ASes present in the Internet Routing Table:         10899
Origin ASes announcing only one prefix:                          4778
Transit ASes present in the Internet Routing Table:              1692
Transit-only ASes present in the Internet Routing Table:           58
Average AS path length visible in the Internet Routing Table:     5.4
    Max AS path length visible:                                    16
Illegal AS announcements present in the Routing Table:              2
Non-routable prefixes present in the Routing Table:                 1
Prefixes being announced from the IANA Reserved Address blocks:    15
Number of addresses announced to Internet:                 1174523208
    Equivalent to 70 /8s, 1 /16s and 205 /24s
    Percentage of available address space announced:             31.7
    Percentage of allocated address space announced:             60.0
    Percentage of available address space allocated:             52.8
Total number of prefixes smaller than registry allocations:     72403

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

Prefixes being announced by APNIC Region ASes:                  17358
    Total APNIC prefixes after maximum aggregation:             10557
Prefixes being announced from the APNIC address blocks:         15867
    Unique aggregates announced from the APNIC address blocks:   9799
APNIC Region origin ASes present in the Internet Routing Table:  1445
APNIC Region origin ASes announcing only one prefix:              491
APNIC Region transit ASes present in the Internet Routing Table:  255
Average APNIC Region AS path length visible:                      5.3
    Max APNIC Region AS path length visible:                       15
Number of APNIC addresses announced to Internet:             79641920
    Equivalent to 4 /8s, 191 /16s and 61 /24s
    Percentage of available APNIC address space announced:       58.9

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:                   72928
    Total ARIN prefixes after maximum aggregation:              47301
Prefixes being announced from the ARIN address blocks:          51446
    Unique aggregates announced from the ARIN address blocks:   16297
ARIN Region origin ASes present in the Internet Routing Table:   7449
ARIN Region origin ASes announcing only one prefix:              2322
ARIN Region transit ASes present in the Internet Routing Table:   766
Average ARIN Region AS path length visible:                       5.2
    Max ARIN Region AS path length visible:                        16
Number of ARIN addresses announced to Internet:             194750084
    Equivalent to 11 /8s, 155 /16s and 166 /24s
    Percentage of available ARIN address space announced:        72.6

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:                   18225
    Total RIPE prefixes after maximum aggregation:              14073
Prefixes being announced from the RIPE address blocks:          14981
    Unique aggregates announced from the RIPE address blocks:    9993
RIPE Region origin ASes present in the Internet Routing Table:   3638
RIPE Region origin ASes announcing only one prefix:              1965
RIPE Region transit ASes present in the Internet Routing Table:   660
Average RIPE Region AS path length visible:                       5.8
    Max RIPE Region AS path length visible:                        15
Number of RIPE addresses announced to Internet:             106891520
    Equivalent to 6 /8s, 95 /16s and 9 /24s
    Percentage of available RIPE address space announced:        70.8

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     1311       1246         963   Telstra Pty Ltd
 4538      454       1162          16   China Education and Research 
  703      402        359         311   UUNET Technologies, Inc. 
 2907      399       1942         365   SINET Japan
 2764      387        361         362   connect.com.au pty ltd
 7474      302        290         206   Optus Communications Pty Ltd
 4755      290        111          88   Videsh Sanchar Nigam Ltd. Aut
 4134      270       1874          98   Data Communications Bureau
 9394      253        112           3   CHINA RAILWAY Internet(CRNET)
17557      226         17          95   Pakistan Telecom
 4766      213       1392         151   Korea Internet Exchange for "
 7539      162        220         155   TANet2, sponsored by NSC, TAI
 9443      162         44          60   Primus Telecommunications
 9768      146        385          88   Korea Telecom
 4804      144         84          68   Microplex PTY LTD
 9583      140         32           5   Satyam Infoway Ltd.,
 7657      122         22          85   The Internet Group Limited
 4780      118        186          40   Digital United Inc.
 4713      117        914         103   NTT Communications Corporatio
17676      115       1840          17   XTAGE CORPORATION

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
  702     1063       2631         856   UUNET Technologies, Inc. 
 3301      398        924         352   TeliaNet Sweden
 1257      247        487         243   SWIPnet Swedish IP Network
 3215      238        570         155   France Telecom / &Equant
  680      232       2147         230   DFN-IP service G-WiN
 5515      217        713         174   Sonera Finland Autonomous Sys
 5400      197         82          93   Concert European Core Network
 3320      196       1964         172   Deutsche Telekom AG
  786      181       1858         181   The JANET IP Service
  719      167        305         121   LANLINK autonomous system
 8708      157         22         145   Romania Data Systems S.A.
 2856      131        790         120   BTnet UK Regional network
 2118      126        109          20   EUnet/RELCOM Autonomous Syste
 3303      123        577         123   Swisscom Ltd
 3269      117        693          71   TELECOM ITALIA
 8297      116         40          65   Teleglobe Autonomous System i
12302      114          7          35   MobiFon S.A.
  517      100        226          98   KPNQwest Germany GmbH
 5536       97         13          25   Internet Egypt Network
 2874       95        100          35   Global One Services AB

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
  701     2106       8443        1503   UUNET Technologies, Inc. 
 7018     1237       7511         932   AT&T 
 3908      834       1661         481   Supernet, Inc. 
    1      817       8102         596   BBN Planet 
 1239      805       3348         621   Sprint 
 4323      658        434         257   Time Warner Communications, I
 7046      616        850         416   UUNET Technologies, Inc. 
  852      614       1127         410   Telus Advanced Communications
  209      537       1974         309   Qwest 
 7132      455        510         164   Southwestern Bell Internet Se
 2914      453       2193         421   Verio, Inc. 
 3549      451        807         234   Global Crossing 
  690      437         66         283   Merit Network 
 7843      377        298          47   Adelphia Corp. 
  705      373        114         263   UUNET Technologies, Inc. 
 2149      373        209         311   Performance Systems, Inc. 
  577      353        588         221   Bell Advanced Communications 
 3561      350       2204         310   Cable & Wireless USA 
 3741      343        730         234   The Internet Solution 
 2386      332        354         189   AT&T Data Communications Serv

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

  ASN   No of nets  Net Savings Description
 4538       454         438      China Education and Research 
 4323       658         401      Time Warner Communications, I
 3908       834         353      Supernet, Inc. 
 1221      1311         348      Telstra Pty Ltd
 7843       377         330      Adelphia Corp. 
 7018      1237         305      AT&T 
 7132       455         291      Southwestern Bell Internet Se
 4151       305         289      USDA 
 6198       307         274      BellSouth Network Solutions, 
11371       279         272      Rhythms NetConnections 
 9394       253         250      CHINA RAILWAY Internet(CRNET)
 6347       316         238      SAVVIS Communications Corpora
 7029       244         229      Alltel Information Services, 
  209       537         228      Qwest 
    1       817         221      BBN Planet 
 3549       451         217      Global Crossing 
  702      1063         207      UUNET Technologies, Inc. 
  852       614         204      Telus Advanced Communications
 4355       243         204      EarthLink, Inc. 
 4755       290         202      Videsh Sanchar Nigam Ltd. Aut

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

Bad AS  Designation  Network              Transit AS  Description
 1877   UNALLOCATED   192.108.201.0/24      1880       Stupi, house man's p
 5757   UNALLOCATED   207.19.224.0/24        701       UUNET Technologies, 

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix             Origin AS  Description
172.16.0.0/12         9367     Tokyo Institute of Technology

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
189.186.184.0/24      4471     Michigan Internet Cooperative
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       /9:6       /10:8       /11:12      /12:38      
/13:90      /14:233     /15:396     /16:7146    /17:1433    /18:2528    
/19:7364    /20:6760    /21:4801    /22:7291    /23:8889    /24:60555   
/25:216     /26:260     /27:120     /28:87      /29:91      /30:130     
/31:0       /32:38      

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

  ASN   No of nets  Total ann.   Description
  701     1351          2106      UUNET Technologies, Inc. 
 1221     1166          1311      Telstra Pty Ltd
  702      687          1063      UUNET Technologies, Inc. 
 7018      652          1237      AT&T 
 3908      589           834      Supernet, Inc. 
 4323      537           658      Time Warner Communications, I
 1239      472           805      Sprint 
  690      433           437      Merit Network 
 7046      433           616      UUNET Technologies, Inc. 
    1      420           817      BBN Planet 
  852      372           614      Telus Advanced Communications
  209      355           537      Qwest 
 2764      343           387      connect.com.au pty ltd
  703      324           402      UUNET Technologies, Inc. 
  705      320           373      UUNET Technologies, Inc. 
 3549      318           451      Global Crossing 
 2149      282           373      Performance Systems, Inc. 
 7066      276           305      Virginia Polytechnic Institut
 6197      275           326      BellSouth Network Solutions, 
11371      273           279      Rhythms NetConnections 

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

   3:1         9:1        12:481      13:10       15:1        17:5      
  20:2        24:771      25:1        32:68       38:9        40:6      
  44:1        57:14       61:230      62:171      63:1880     64:1128   
  65:1032     66:721      67:34       68:7        80:204      81:5      
 128:62      129:123     130:21      131:57      132:11      133:3      
 134:128     135:10      136:247     137:101     138:148     139:47     
 140:185     141:62      142:88      143:37      144:152     145:12     
 146:216     147:156     148:146     149:92      150:39      151:45     
 152:352     153:32      154:7       155:85      156:75      157:121    
 158:78      159:89      160:23      161:55      162:139     163:115    
 164:95      165:120     166:225     167:182     168:119     169:51     
 170:293     171:2       189:1       192:5436    193:2180    194:2103   
 195:817     196:443     198:3741    199:3236    200:2318    201:1      
 202:2906    203:4459    204:3337    205:2174    206:2526    207:2626   
 208:2570    209:2820    210:528     211:184     212:895     213:567    
 214:9       215:18      216:2969    217:452     218:10     

End of report



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