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Weekly Routing Table Report



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 29 Mar, 2002

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

BGP routing table entries examined:                            110532
    Prefixes after maximum aggregation:                         72321
    Unique aggregates announced to Internet:                    53586
Total ASes present in the Internet Routing Table:               12821
Origin-only ASes present in the Internet Routing Table:         11097
Origin ASes announcing only one prefix:                          4863
Transit ASes present in the Internet Routing Table:              1724
Transit-only ASes present in the Internet Routing Table:           54
Average AS path length visible in the Internet Routing Table:     5.3
    Max AS path length visible:                                    17
Illegal AS announcements present in the Routing Table:             11
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:                 1163171560
    Equivalent to 69 /8s, 84 /16s and 150 /24s
    Percentage of available address space announced:             31.4
    Percentage of allocated address space announced:             59.4
    Percentage of available address space allocated:             52.8
Total number of prefixes smaller than registry allocations:     74196

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

Prefixes being announced by APNIC Region ASes:                  18278
    Total APNIC prefixes after maximum aggregation:             10781
Prefixes being announced from the APNIC address blocks:         16756
    Unique aggregates announced from the APNIC address blocks:  10127
APNIC Region origin ASes present in the Internet Routing Table:  1471
APNIC Region origin ASes announcing only one prefix:              477
APNIC Region transit ASes present in the Internet Routing Table:  262
Average APNIC Region AS path length visible:                      5.3
    Max APNIC Region AS path length visible:                       15
Number of APNIC addresses announced to Internet:             82277440
    Equivalent to 4 /8s, 231 /16s and 116 /24s
    Percentage of available APNIC address space announced:       60.8

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:                   73730
    Total ARIN prefixes after maximum aggregation:              47319
Prefixes being announced from the ARIN address blocks:          52165
    Unique aggregates announced from the ARIN address blocks:   17506
ARIN Region origin ASes present in the Internet Routing Table:   7584
ARIN Region origin ASes announcing only one prefix:              2390
ARIN Region transit ASes present in the Internet Routing Table:   769
Average ARIN Region AS path length visible:                       5.2
    Max ARIN Region AS path length visible:                        16
Number of ARIN addresses announced to Internet:             184069572
    Equivalent to 10 /8s, 248 /16s and 173 /24s
    Percentage of available ARIN address space announced:        68.6

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:                   18518
    Total RIPE prefixes after maximum aggregation:              14221
Prefixes being announced from the RIPE address blocks:          15231
    Unique aggregates announced from the RIPE address blocks:   10125
RIPE Region origin ASes present in the Internet Routing Table:   3711
RIPE Region origin ASes announcing only one prefix:              1996
RIPE Region transit ASes present in the Internet Routing Table:   677
Average RIPE Region AS path length visible:                       5.8
    Max RIPE Region AS path length visible:                        17
Number of RIPE addresses announced to Internet:             108317472
    Equivalent to 6 /8s, 116 /16s and 203 /24s
    Percentage of available RIPE address space announced:        71.7

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     1284       1211         944   Telstra Pty Ltd
 4538      464       1194          17   China Education and Research 
 2907      437       1895         371   SINET Japan
  703      416        336         324   UUNET Technologies, Inc. 
 2764      385        361         360   connect.com.au pty ltd
 9394      331        113           4   CHINA RAILWAY Internet(CRNET)
 7474      312        290         211   Optus Communications Pty Ltd
 4755      285        111          81   Videsh Sanchar Nigam Ltd. Aut
 4134      276       1978          98   Data Communications Bureau
 9443      276         44          64   Primus Telecommunications
17557      256         18          98   Pakistan Telecom
 4766      209       1516         147   Korea Internet Exchange for "
 7539      169        256         162   TANet2, sponsored by NSC, TAI
 4804      164         84          67   Microplex PTY LTD
 9583      151         32           5   Satyam Infoway Ltd.,
 9768      142        385          82   Korea Telecom
 4780      129        186          39   Digital United Inc.
 7657      122         22          85   The Internet Group Limited
 4713      120        891         104   NTT Communications Corporatio
17676      119       1904          12   XTAGE CORPORATION

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
  702     1029       2596         844   UUNET Technologies, Inc. 
 3301      389        923         344   TeliaNet Sweden
 3215      267        581         175   France Telecom / &Equant
 5515      264        696         169   Sonera Finland Autonomous Sys
  680      232       2149         231   DFN-IP service G-WiN
 1257      225        472         221   SWIPnet Swedish IP Network
 3320      225       1964         173   Deutsche Telekom AG
 5400      197         84          94   Concert European Core Network
  786      182       1874         182   The JANET IP Service
  719      163        289         118   LANLINK autonomous system
 8708      160         23         148   Romania Data Systems S.A.
 2856      129        788         118   BTnet UK Regional network
12302      125          8          46   MobiFon S.A.
 3303      124        565         123   Swisscom Ltd
 3269      117        694          71   TELECOM ITALIA
 8297      117         53          67   Teleglobe Autonomous System i
 5511      103        194          91   France Telecom
  517      102        226          98   KPNQwest Germany GmbH
 9051      101          6          25   INCONET Autonomous System
 2874       96         84          36   Global One Services AB

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
  701     2085       8445        1448   UUNET Technologies, Inc. 
 7018     1238       7513         919   AT&T 
 3908      849       1675         479   Supernet, Inc. 
 1239      813       3371         636   Sprint 
    1      811       8123         608   BBN Planet 
  852      629       1112         416   Telus Advanced Communications
 4323      629        436         252   Time Warner Communications, I
 7046      602        837         373   UUNET Technologies, Inc. 
  209      557       1993         323   Qwest 
 7132      522        552         161   Southwestern Bell Internet Se
 3549      513        860         265   Global Crossing 
  690      454         67         297   Merit Network 
 7843      421        298          47   Adelphia Corp. 
 2914      415       2162         412   Verio, Inc. 
  705      374        115         266   UUNET Technologies, Inc. 
 2149      367        208         305   Performance Systems, Inc. 
 3741      341        731         234   The Internet Solution 
 7066      336        203         251   Virginia Polytechnic Institut
 6197      332        217         173   BellSouth Network Solutions, 
 3561      321       2152         288   Cable & Wireless USA 

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

  ASN   No of nets  Net Savings Description
 4538       464         447      China Education and Research 
 4323       629         377      Time Warner Communications, I
 7843       421         374      Adelphia Corp. 
 3908       849         370      Supernet, Inc. 
 7132       522         361      Southwestern Bell Internet Se
 1221      1284         340      Telstra Pty Ltd
 9394       331         327      CHINA RAILWAY Internet(CRNET)
 7018      1238         319      AT&T 
 4151       308         292      USDA 
 6198       311         280      BellSouth Network Solutions, 
 4565       311         277      Epoch Networks 
11371       277         271      Rhythms NetConnections 
 3549       513         248      Global Crossing 
 6347       317         238      SAVVIS Communications Corpora
  209       557         234      Qwest 
 7029       246         231      Alltel Information Services, 
 7046       602         229      UUNET Technologies, Inc. 
  852       629         213      Telus Advanced Communications
 9443       276         212      Primus Telecommunications
 4355       245         209      EarthLink, Inc. 

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

Bad AS  Designation  Network              Transit AS  Description
23279   UNALLOCATED   63.238.4.0/24          209       Qwest 
64516   PRIVATE       137.164.227.0/24      2150       California State Uni
64516   PRIVATE       137.164.228.0/22      2150       California State Uni
  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, 
23279   UNALLOCATED   216.207.52.0/24        209       Qwest 
23279   UNALLOCATED   216.207.53.0/24        209       Qwest 

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        /8:18       /9:5       /10:8       /11:14      /12:35      
/13:88      /14:231     /15:402     /16:7182    /17:1398    /18:2570    
/19:7438    /20:6904    /21:4952    /22:7580    /23:9158    /24:61569   
/25:222     /26:270     /27:118     /28:102     /29:105     /30:126     
/31:0       /32:37      

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

  ASN   No of nets  Total ann.   Description
  701     1355          2085      UUNET Technologies, Inc. 
 1221     1143          1284      Telstra Pty Ltd
  702      654          1029      UUNET Technologies, Inc. 
 7018      647          1238      AT&T 
 3908      581           849      Supernet, Inc. 
 4323      498           629      Time Warner Communications, I
 1239      470           813      Sprint 
  690      449           454      Merit Network 
 7046      415           602      UUNET Technologies, Inc. 
    1      405           811      BBN Planet 
  852      381           629      Telus Advanced Communications
 3549      373           513      Global Crossing 
  209      366           557      Qwest 
 2764      340           385      connect.com.au pty ltd
  703      336           416      UUNET Technologies, Inc. 
  705      322           374      UUNET Technologies, Inc. 
 9394      317           331      CHINA RAILWAY Internet(CRNET)
 7066      307           336      Virginia Polytechnic Institut
 4565      286           311      Epoch Networks 
 2149      283           367      Performance Systems, Inc. 

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

   3:1         4:7         9:1        12:490      13:10       15:2      
  17:6        20:2        24:750      25:1        32:68       38:8      
  40:6        44:1        57:14       61:312      62:152      63:1904   
  64:1180     65:1111     66:787      67:57       68:4        80:224    
  81:7       128:64      129:128     130:23      131:56      132:11     
 133:3       134:126     135:10      136:314     137:97      138:138    
 139:49      140:187     141:90      142:83      143:38      144:141    
 145:11      146:220     147:147     148:138     149:91      150:39     
 151:46      152:317     153:33      154:1       155:108     156:76     
 157:118     158:72      159:125     160:27      161:55      162:140    
 163:104     164:134     165:122     166:220     167:193     168:100    
 169:52      170:288     171:2       192:5436    193:2267    194:2095   
 195:795     196:429     198:3723    199:3202    200:2395    201:1      
 202:3119    203:4574    204:3244    205:2166    206:2565    207:2672   
 208:2572    209:2813    210:590     211:208     212:876     213:597    
 214:9       215:18      216:3084    217:462     218:15     

End of report

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