Weekly Routing Table Report

Routing Table Analysis cscora at thyme.apnic.net
Fri May 17 06:05:04 EDT 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 17 May, 2002

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

BGP routing table entries examined:                            112248
    Prefixes after maximum aggregation:                         73217
    Unique aggregates announced to Internet:                    52555
Total ASes present in the Internet Routing Table:               13075
Origin-only ASes present in the Internet Routing Table:         11335
Origin ASes announcing only one prefix:                          4978
Transit ASes present in the Internet Routing Table:              1740
Transit-only ASes present in the Internet Routing Table:           49
Average AS path length visible in the Internet Routing Table:     5.4
    Max AS path length visible:                                    17
Illegal AS announcements present in the Routing Table:             11
Non-routable prefixes present in the Routing Table:                 1
Prefixes being announced from the IANA Reserved Address blocks:    40
Number of addresses announced to Internet:                 1179664060
    Equivalent to 70 /8s, 80 /16s and 62 /24s
    Percentage of available address space announced:             31.8
    Percentage of allocated address space announced:             59.3
    Percentage of available address space allocated:             53.7
Total number of prefixes smaller than registry allocations:     45313

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

Prefixes being announced by APNIC Region ASes:                  18016
    Total APNIC prefixes after maximum aggregation:             10886
Prefixes being announced from the APNIC address blocks:         16528
    Unique aggregates announced from the APNIC address blocks:  10235
APNIC Region origin ASes present in the Internet Routing Table:  1510
APNIC Region origin ASes announcing only one prefix:              497
APNIC Region transit ASes present in the Internet Routing Table:  270
Average APNIC Region AS path length visible:                      5.3
    Max APNIC Region AS path length visible:                       17
Number of APNIC addresses announced to Internet:             84693696
    Equivalent to 5 /8s, 12 /16s and 82 /24s
    Percentage of available APNIC address space announced:       62.6

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:                   75420
    Total ARIN prefixes after maximum aggregation:              47997
Prefixes being announced from the ARIN address blocks:          53719
    Unique aggregates announced from the ARIN address blocks:   16805
ARIN Region origin ASes present in the Internet Routing Table:   7725
ARIN Region origin ASes announcing only one prefix:              2446
ARIN Region transit ASes present in the Internet Routing Table:   754
Average ARIN Region AS path length visible:                       5.3
    Max ARIN Region AS path length visible:                        16
Number of ARIN addresses announced to Internet:             192265156
    Equivalent to 11 /8s, 117 /16s and 187 /24s
    Percentage of available ARIN address space announced:        71.6

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
                       25600 - 26623
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:                   18812
    Total RIPE prefixes after maximum aggregation:              14334
Prefixes being announced from the RIPE address blocks:          15512
    Unique aggregates announced from the RIPE address blocks:    9747
RIPE Region origin ASes present in the Internet Routing Table:   3791
RIPE Region origin ASes announcing only one prefix:              2035
RIPE Region transit ASes present in the Internet Routing Table:   699
Average RIPE Region AS path length visible:                       5.9
    Max RIPE Region AS path length visible:                        17
Number of RIPE addresses announced to Internet:             114854192
    Equivalent to 6 /8s, 216 /16s and 137 /24s
    Percentage of available RIPE address space announced:        76.1

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     1270       1223         914   Telstra Pty Ltd
 4538      478       1194          17   China Education and Research 
 2907      432       1910         373   SINET Japan
  703      403        337         324   UUNET Technologies, Inc. 
 2764      396        360         363   connect.com.au pty ltd
 7474      308        291         206   Optus Communications Pty Ltd
 4134      281       2068          95   Data Communications Bureau
17557      270         18         108   Pakistan Telecom
 4755      265        109          75   Videsh Sanchar Nigam Ltd. Aut
 9443      253         44          59   Primus Telecommunications
 4766      224       1518         156   Korea Internet Exchange for "
 9583      177         32           5   Satyam Infoway Ltd.,
 7539      152        218         146   TANet2, sponsored by NSC, TAI
 9768      146        386          80   Korea Telecom
 7657      131         22          87   The Internet Group Limited
 4814      127         66          13   China Telecom (Group) - Beiji
17676      125       1954          10   XTAGE CORPORATION
 4780      118        186          39   Digital United Inc.
 4713      114        993         105   NTT Communications Corporatio
 9800      114        186          22   CHINA UNICOM

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
  702     1035       2607         853   UUNET Technologies, Inc. 
 3301      394        908         346   TeliaNet Sweden
 5515      268        776         176   Sonera Finland Autonomous Sys
 3215      264        597         164   France Telecom / &Equant
  680      231       2149         230   DFN-IP service G-WiN
 3320      231       1947         178   Deutsche Telekom AG
 1257      208        430         205   SWIPnet Swedish IP Network
 5400      200         83          95   Concert European Core Network
  786      182       1874         182   The JANET IP Service
  719      168        289         120   LANLINK autonomous system
 8708      141         22         136   Romania Data Systems S.A.
12302      131          9          49   MobiFon S.A.
 2856      126        786         116   BTnet UK Regional network
 3303      117        546         115   Swisscom Ltd
 8297      116       4137          62   Teleglobe Autonomous System i
 3269      115        694          71   TELECOM ITALIA
 5511      111        191          92   France Telecom
  517      101        226          97   KPNQwest Germany GmbH
 2830      100        244          76   UUNET Dual-Homed customers
 2874       97         84          37   Global One Services AB

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
  701     2089       8380        1458   UUNET Technologies, Inc. 
 7018     1293       7558         936   AT&T 
 3908      883       1644         486   Supernet, Inc. 
 1239      828       3412         669   Sprint 
    1      813       8185         459   BBN Planet 
 7046      690        872         476   UUNET Technologies, Inc. 
  852      664       1132         422   Telus Advanced Communications
 4323      632        436         257   Time Warner Communications, I
  209      583       1967         325   Qwest 
 7132      568        606         136   Southwestern Bell Internet Se
  690      564         82         366   Merit Network 
 3549      515        854         320   Global Crossing 
 7843      503        364          57   Adelphia Corp. 
 7066      473        202         248   Virginia Polytechnic Institut
 2914      399       2110         390   Verio, Inc. 
  705      373        100         265   UUNET Technologies, Inc. 
 3741      344        731         236   The Internet Solution 
 4293      342         84         265   Cable & Wireless USA 
 2149      341        191         283   Performance Systems, Inc. 
 6197      341        260         164   BellSouth Network Solutions, 

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

  ASN   No of nets  Net Savings Description
 4538       478         461      China Education and Research 
 7843       503         446      Adelphia Corp. 
 7132       568         432      Southwestern Bell Internet Se
 3908       883         397      Supernet, Inc. 
 4323       632         375      Time Warner Communications, I
 7018      1293         357      AT&T 
 1221      1270         356      Telstra Pty Ltd
    1       813         354      BBN Planet 
11371       292         286      Rhythms NetConnections 
 4151       300         284      USDA 
  209       583         258      Qwest 
 6347       337         258      SAVVIS Communications Corpora
 7029       261         246      Alltel Information Services, 
  852       664         242      Telus Advanced Communications
 4355       276         238      EarthLink, Inc. 
 7066       473         225      Virginia Polytechnic Institut
 7046       690         214      UUNET Technologies, Inc. 
 6198       313         209      BellSouth Network Solutions, 
 6517       240         206      Yipes Communications, Inc. 
18566       209         205      Covad Communications 

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

Bad AS  Designation  Network              Transit AS  Description
18189   UNALLOCATED   202.59.196.0/24        703       UUNET Technologies, 
 5757   UNALLOCATED   207.19.224.0/24        701       UUNET Technologies, 
25810   UNALLOCATED   209.242.165.32/27      195       San Diego Supercompu
25810   UNALLOCATED   209.242.165.128/25     195       San Diego Supercompu
25810   UNALLOCATED   209.242.166.0/26       195       San Diego Supercompu
25810   UNALLOCATED   209.242.166.72/29      195       San Diego Supercompu
25810   UNALLOCATED   209.242.166.80/28      195       San Diego Supercompu
25810   UNALLOCATED   209.242.166.96/29      195       San Diego Supercompu
25810   UNALLOCATED   209.242.166.112/28     195       San Diego Supercompu
25810   UNALLOCATED   209.242.166.128/29     195       San Diego Supercompu
25810   UNALLOCATED   209.242.166.160/27     195       San Diego Supercompu

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

Prefix             Origin AS  Description
192.0.2.0/24          1103     SURFnet BV

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

Network            Origin AS  Description
39.0.0.0/8            4554     Exchange Point Blocks 
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 
153.147.0.0/16        3561     Cable & Wireless USA 
154.150.0.0/16        6494     IDCI 
158.0.0.0/13           568     DISO-UNRRA 
164.233.0.0/16        6020     DISA NETWORK SERVICES 
192.31.126.0/23       1103     SURFnet BV
192.31.128.0/21       1103     SURFnet BV
192.44.0.0/19          702     UUNET Technologies, Inc. 
192.72.0.0/18         4780     Digital United Inc.
192.72.0.0/16         4780     Digital United Inc.
192.83.14.0/24        5515     Sonera Finland Autonomous Sys
192.83.16.0/20        5515     Sonera Finland Autonomous Sys
192.83.25.0/24        5515     Sonera Finland Autonomous Sys
192.83.32.0/19        5515     Sonera Finland Autonomous Sys
192.83.96.0/22        5515     Sonera Finland Autonomous Sys
192.83.100.0/24       5515     Sonera Finland Autonomous Sys
192.91.198.0/24       2568     CTS Network Services 
192.92.167.0/24        297     NASA Science Network 
192.119.135.0/24       270     NASA 
192.135.50.0/24       7018     AT&T 
192.135.248.0/23       109     Cisco Systems, Inc. 
192.136.79.0/24        719     LANLINK autonomous system
192.136.86.0/24        719     LANLINK autonomous system
192.136.87.0/24        719     LANLINK autonomous system
192.136.88.0/24        719     LANLINK autonomous system
192.139.62.0/24       6539     GT Group Telecom Services Cor
192.140.0.0/16        5511     France Telecom
192.152.213.0/24      1239     Sprint 
192.153.136.0/21       568     DISO-UNRRA 
192.156.0.0/19         568     DISO-UNRRA 
192.172.0.0/19         568     DISO-UNRRA 
192.195.253.0/24       237     Merit Network 
192.208.29.0/24       3908     Supernet, Inc. 
192.208.30.0/23       3908     Supernet, Inc. 
192.243.36.0/23       7168     Northwest Link 

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

 /1:0        /2:0        /3:0        /4:0        /5:0        /6:0       
 /7:0        /8:20       /9:6       /10:7       /11:13      /12:32      
/13:85      /14:232     /15:407     /16:7200    /17:1442    /18:2569    
/19:7517    /20:7112    /21:5054    /22:7740    /23:9388    /24:62606   
/25:215     /26:188     /27:89      /28:98      /29:46      /30:113     
/31:0       /32:69      

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

  ASN   No of nets  Total ann.   Description
  701      658          2089      UUNET Technologies, Inc. 
  702      643          1035      UUNET Technologies, Inc. 
 3908      472           883      Supernet, Inc. 
  690      455           564      Merit Network 
 7066      378           473      Virginia Polytechnic Institut
 7018      336          1293      AT&T 
 7046      321           690      UUNET Technologies, Inc. 
 7843      293           503      Adelphia Corp. 
  209      267           583      Qwest 
    1      251           813      BBN Planet 
 7029      246           261      Alltel Information Services, 
 6197      245           341      BellSouth Network Solutions, 
11371      245           292      Rhythms NetConnections 
 3301      237           394      TeliaNet Sweden
 6198      231           313      BellSouth Network Solutions, 
 4293      220           342      Cable & Wireless USA 
 6517      218           240      Yipes Communications, Inc. 
 3549      216           515      Global Crossing 
 1239      215           828      Sprint 
18566      205           209      Covad Communications 

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

   4:3         9:1        12:508      13:10       15:2        17:7      
  20:2        24:768      25:1        32:40       38:8        40:6      
  44:1        57:13       61:219      62:202      63:1973     64:1197   
  65:1388     66:916      67:77       68:12       80:231      81:27     
 128:59      129:133     130:23      131:47      132:13      133:3      
 134:120     135:9       136:254     137:93      138:150     139:56     
 140:181     141:120     142:78      143:38      144:148     145:11     
 146:178     147:134     148:168     149:94      150:40      151:60     
 152:269     153:33      154:3       155:99      156:74      157:127    
 158:69      159:127     160:18      161:64      162:147     163:101    
 164:271     165:141     166:229     167:171     168:124     169:57     
 170:338     171:2       192:5441    193:2305    194:2108    195:797    
 196:410     198:3694    199:3243    200:2517    202:3135    203:4559   
 204:3270    205:2178    206:2618    207:2668    208:2817    209:2719   
 210:593     211:223     212:879     213:622     214:9       215:18     
 216:3023    217:457     218:17     

End of report



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