Weekly Routing Table Report

Routing Table Analysis cscora at thyme.apnic.net
Fri Jan 25 05:04:40 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 25 Jan, 2002

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

BGP routing table entries examined:                            107651
    Prefixes after maximum aggregation:                         71781
    Unique aggregates announced to Internet:                    52429
Total ASes present in the Internet Routing Table:               12435
Origin-only ASes present in the Internet Routing Table:         10766
Origin ASes announcing only one prefix:                          4691
Transit ASes present in the Internet Routing Table:              1669
Transit-only ASes present in the Internet Routing Table:           57
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:              3
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:                 1162813064
    Equivalent to 69 /8s, 79 /16s and 30 /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:     71770

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

Prefixes being announced by APNIC Region ASes:                  17200
    Total APNIC prefixes after maximum aggregation:             10593
Prefixes being announced from the APNIC address blocks:         15701
    Unique aggregates announced from the APNIC address blocks:   9832
APNIC Region origin ASes present in the Internet Routing Table:  1441
APNIC Region origin ASes announcing only one prefix:              477
APNIC Region transit ASes present in the Internet Routing Table:  250
Average APNIC Region AS path length visible:                      5.3
    Max APNIC Region AS path length visible:                       15
Number of APNIC addresses announced to Internet:             78769984
    Equivalent to 4 /8s, 177 /16s and 239 /24s
    Percentage of available APNIC address space announced:       58.2

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:                   72496
    Total ARIN prefixes after maximum aggregation:              47251
Prefixes being announced from the ARIN address blocks:          51282
    Unique aggregates announced from the ARIN address blocks:   17117
ARIN Region origin ASes present in the Internet Routing Table:   7354
ARIN Region origin ASes announcing only one prefix:              2277
ARIN Region transit ASes present in the Internet Routing Table:   755
Average ARIN Region AS path length visible:                       5.2
    Max ARIN Region AS path length visible:                        16
Number of ARIN addresses announced to Internet:             184793284
    Equivalent to 11 /8s, 3 /16s and 184 /24s
    Percentage of available ARIN address space announced:        68.8

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:                   17955
    Total RIPE prefixes after maximum aggregation:              13937
Prefixes being announced from the RIPE address blocks:          14724
    Unique aggregates announced from the RIPE address blocks:    9818
RIPE Region origin ASes present in the Internet Routing Table:   3582
RIPE Region origin ASes announcing only one prefix:              1937
RIPE Region transit ASes present in the Internet Routing Table:   653
Average RIPE Region AS path length visible:                       5.8
    Max RIPE Region AS path length visible:                        15
Number of RIPE addresses announced to Internet:             106183936
    Equivalent to 6 /8s, 84 /16s and 61 /24s
    Percentage of available RIPE address space announced:        70.3

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     1337       1260         976   Telstra Pty Ltd
 4538      450       1162          16   China Education and Research 
 2764      397        377         371   connect.com.au pty ltd
 2907      396       1910         366   SINET Japan
  703      389        324         296   UUNET Technologies, Inc. 
 7474      300        286         205   Optus Communications Pty Ltd
 4755      299        113          88   Videsh Sanchar Nigam Ltd. Aut
 4134      268       1858         100   Data Communications Bureau
 4766      198       1393         145   Korea Internet Exchange for "
17557      188         14          88   Pakistan Telecom
 9443      160         44          59   Primus Telecommunications
 9768      145        385          88   Korea Telecom
 1659      143        908          33   Taiwan Academic Network (TANe
 4740      143         34         117   OzEmail ISP
 9583      137         32           5   Satyam Infoway Ltd.,
 7657      125         22          85   The Internet Group Limited
 7539      121        116         120   TANet2, sponsored by NSC, TAI
 4780      116        186          40   Digital United Inc.
 4713      115        894         102   NTT Communications Corporatio
 9800      113        193          22   CHINA UNICOM

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
  702     1116       2622         862   UUNET Technologies, Inc. 
 3301      398        924         351   TeliaNet Sweden
 1257      253        487         249   SWIPnet Swedish IP Network
 3215      236        562         153   France Telecom / &Equant
  680      235       2149         233   DFN-IP service G-WiN
 5515      218        705         175   Sonera Finland Autonomous Sys
 3320      190       1961         168   Deutsche Telekom AG
 5400      186         77          92   Concert European Core Network
  786      182       1874         182   The JANET IP Service
  719      164        289         118   LANLINK autonomous system
 8708      149         20         139   Romania Data Systems S.A.
 2856      135        775         124   BTnet UK Regional network
 3303      124        575         124   Swisscom Ltd
 3269      118        695          72   TELECOM ITALIA
 8297      117         40          66   Teleglobe Autonomous System i
12302      115          7          36   MobiFon S.A.
  517      103        227         101   KPNQwest Germany GmbH
 1290       94        411          69   PSINet UK Ltd.
 1267       92       1471          42   Infostrada S.p.A.
 5511       91        192          80   France Telecom

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
  701     2091       8307        1511   UUNET Technologies, Inc. 
 7018     1744       7561         977   AT&T 
    1      841       8264         613   BBN Planet 
 3908      786       1656         464   Supernet, Inc. 
 1239      775       3157         604   Sprint 
 7046      641        837         422   UUNET Technologies, Inc. 
 4323      623        414         222   Time Warner Communications, I
  852      564        978         364   Telus Advanced Communications
  209      518       1875         295   Qwest 
  690      510         74         313   Merit Network 
 2914      453       2193         422   Verio, Inc. 
 7132      449        504         159   Southwestern Bell Internet Se
  705      432        190         284   UUNET Technologies, Inc. 
 3549      428        835         221   Global Crossing 
 2149      395        214         331   Performance Systems, Inc. 
 2386      385        354         244   AT&T Data Communications Serv
 3561      381       2236         331   Cable & Wireless USA 
 3967      379        372         205   Exodus Communication 
 3741      350        731         239   The Internet Solution 
  577      349        604         219   Bell Advanced Communications 

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

  ASN   No of nets  Net Savings Description
 7018      1744         767      AT&T 
 4538       450         434      China Education and Research 
 4323       623         401      Time Warner Communications, I
 1221      1337         361      Telstra Pty Ltd
 3908       786         322      Supernet, Inc. 
 4151       337         321      USDA 
 7132       449         290      Southwestern Bell Internet Se
11371       278         271      Rhythms NetConnections 
  702      1116         254      UUNET Technologies, Inc. 
 6347       312         237      SAVVIS Communications Corpora
    1       841         228      BBN Planet 
  209       518         223      Qwest 
 7843       258         220      Adelphia Corp. 
 7046       641         219      UUNET Technologies, Inc. 
 4755       299         211      Videsh Sanchar Nigam Ltd. Aut
 3549       428         207      Global Crossing 
 4355       237         207      EarthLink, Inc. 
  852       564         200      Telus Advanced Communications
  690       510         197      Merit Network 
 6172       240         189      @Home Network 

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

Bad AS  Designation  Network              Transit AS  Description
23098   UNALLOCATED   144.9.72.0/24        12179       InterNAP Network Ser
23098   UNALLOCATED   144.9.73.0/24        12179       InterNAP Network Ser
 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 
126.0.0.0/8           7336     Compass Communications 
132.0.0.0/10           568     DISO-UNRRA 
134.137.0.0/16         400     Headquarters Standard Systems
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       /9:6       /10:7       /11:12      /12:37      
/13:92      /14:231     /15:390     /16:7138    /17:1410    /18:2488    
/19:7305    /20:6672    /21:4810    /22:7291    /23:8939    /24:59959   
/25:216     /26:205     /27:111     /28:83      /29:58      /30:135     
/31:0       /32:38      

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

  ASN   No of nets  Total ann.   Description
  701     1336          2091      UUNET Technologies, Inc. 
 1221     1187          1337      Telstra Pty Ltd
 7018     1153          1744      AT&T 
  702      739          1116      UUNET Technologies, Inc. 
 3908      539           786      Supernet, Inc. 
 4323      512           623      Time Warner Communications, I
  690      506           510      Merit Network 
 7046      470           641      UUNET Technologies, Inc. 
 1239      458           775      Sprint 
    1      434           841      BBN Planet 
 2764      352           397      connect.com.au pty ltd
  705      351           432      UUNET Technologies, Inc. 
  852      351           564      Telus Advanced Communications
  209      340           518      Qwest 
  703      316           389      UUNET Technologies, Inc. 
 2386      309           385      AT&T Data Communications Serv
 2149      298           395      Performance Systems, Inc. 
 3549      296           428      Global Crossing 
 4151      291           337      USDA 
 7066      275           304      Virginia Polytechnic Institut

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

   4:2         9:1        12:735      13:10       15:1        17:5      
  20:1        24:701      25:1        32:180      38:12       40:4      
  44:2        57:14       61:211      62:169      63:1878     64:1096   
  65:997      66:614      67:33       68:19       80:167      81:4      
 128:60      129:134     130:23      131:49      132:13      133:2      
 134:121     135:10      136:124     137:104     138:61      139:29     
 140:94      141:58      142:65      143:38      144:56      145:12     
 146:216     147:62      148:142     149:86      150:39      151:43     
 152:381     153:34      154:8       155:83      156:81      157:83     
 158:73      159:86      160:26      161:54      162:96      163:125    
 164:91      165:115     166:225     167:161     168:121     169:48     
 170:283     171:4       192:5399    193:2123    194:2033    195:792    
 196:436     198:3740    199:3256    200:2313    201:1       202:2898   
 203:4512    204:3299    205:2149    206:2601    207:2645    208:2580   
 209:2911    210:531     211:152     212:878     213:589     214:7      
 215:16      216:2970    217:440     218:12     

End of report



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