Weekly Routing Table Report

Routing Table Analysis cscora at thyme.apnic.net
Fri Dec 21 05:04:13 EST 2001


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 Fri 21 Dec, 2001

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

BGP routing table entries examined:                            108272
    Prefixes after maximum aggregation:                         71920
    Unique aggregates announced to Internet:                    52032
Total ASes present in the Internet Routing Table:               12309
Origin-only ASes present in the Internet Routing Table:         10690
Origin ASes announcing only one prefix:                          4617
Transit ASes present in the Internet Routing Table:              1619
Transit-only ASes present in the Internet Routing Table:           56
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:              7
Non-routable prefixes present in the Routing Table:                 0
Prefixes being announced from the IANA Reserved Address blocks:    15
Number of addresses announced to Internet:                 1144719040
    Equivalent to 68 /8s, 59 /16s and 6 /24s
    Percentage of available address space announced:             30.9
    Percentage of allocated address space announced:             58.4
    Percentage of available address space allocated:             52.8
Total number of prefixes smaller than registry allocations:     73022

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

Prefixes being announced by APNIC Region ASes:                  17066
    Total APNIC prefixes after maximum aggregation:             10574
Prefixes being announced from the APNIC address blocks:         15483
    Unique aggregates announced from the APNIC address blocks:   9799
APNIC Region origin ASes present in the Internet Routing Table:  1426
APNIC Region origin ASes announcing only one prefix:              467
APNIC Region transit ASes present in the Internet Routing Table:  241
Average APNIC Region AS path length visible:                      5.2
    Max APNIC Region AS path length visible:                       14
Number of APNIC addresses announced to Internet:             77823344
    Equivalent to 4 /8s, 163 /16s and 125 /24s
    Percentage of available APNIC address space announced:       57.5

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:                   73280
    Total ARIN prefixes after maximum aggregation:              47428
Prefixes being announced from the ARIN address blocks:          52651
    Unique aggregates announced from the ARIN address blocks:   16942
ARIN Region origin ASes present in the Internet Routing Table:   7291
ARIN Region origin ASes announcing only one prefix:              2244
ARIN Region transit ASes present in the Internet Routing Table:   743
Average ARIN Region AS path length visible:                       5.2
    Max ARIN Region AS path length visible:                        16
Number of ARIN addresses announced to Internet:             180579276
    Equivalent to 10 /8s, 195 /16s and 107 /24s
    Percentage of available ARIN address space announced:        67.3

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:                   17921
    Total RIPE prefixes after maximum aggregation:              13918
Prefixes being announced from the RIPE address blocks:          14615
    Unique aggregates announced from the RIPE address blocks:    9696
RIPE Region origin ASes present in the Internet Routing Table:   3536
RIPE Region origin ASes announcing only one prefix:              1906
RIPE Region transit ASes present in the Internet Routing Table:   625
Average RIPE Region AS path length visible:                       5.9
    Max RIPE Region AS path length visible:                        15
Number of RIPE addresses announced to Internet:             104469248
    Equivalent to 6 /8s, 58 /16s and 19 /24s
    Percentage of available RIPE address space announced:        69.2

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
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     1504       1261        1042   Telstra Pty Ltd
 2764      399        376         373   connect.com.au pty ltd
  703      398        346         305   UUNET Technologies, Inc. 
 2907      370       1832         340   SINET Japan
 7474      310        285         201   Optus Communications Pty Ltd
 4755      294        117          81   Videsh Sanchar Nigam Ltd. Aut
 4134      268       1890          96   Data Communications Bureau
 2521      190        165          28   PSINet Japan
 4766      185       1395         135   Korea Internet Exchange for "
 1659      175        924          34   Taiwan Academic Network (TANe
17557      174         13          83   Pakistan Telecom
 9443      172         45          68   Primus Telecommunications
 9583      150         32           3   Satyam Infoway Ltd.,
 4740      149         34         123   OzEmail ISP
 7539      143        136         142   TANet2, sponsored by NSC, TAI
 9768      142        381          87   Korea Telecom
 4812      137        192          34   China Telecom (Group) - Shang
17676      125       1920           7   XTAGE CORPORATION
 4713      120        942         107   NTT Communications Corporatio
 7657      119         21          78   The Internet Group Limited

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
  702     1095       2688         864   UUNET Technologies, Inc. 
 3301      425        925         354   TeliaNet Sweden
 1257      253        473         250   SWIPnet Swedish IP Network
 3215      235        555         151   France Telecom / &Equant
  680      233       2149         231   DFN-IP service G-WiN
 5515      217        721         177   Sonera Finland Autonomous Sys
 3320      186       1960         165   Deutsche Telekom AG
  786      182       1874         182   The JANET IP Service
  719      164        289         118   LANLINK autonomous system
 8708      148         20         140   Romania Data Systems S.A.
 5400      147         59          84   Concert European Core Network
 5549      141         78          62   Nextra Deutschland GmbH + Co.
 2856      136        777         125   BTnet UK Regional network
 3303      134        575         124   Swisscom Ltd
 8895      116         89          40   Saudi Arabia AS
 3269      114        662          70   TELECOM ITALIA
12302      112          7          36   MobiFon S.A.
  517      109        232         107   KPNQwest Germany GmbH
 8297      107         31          64   Teleglobe Autonomous System i
 5511       99        192          79   France Telecom

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
  701     2159       8829        1528   UUNET Technologies, Inc. 
 7018     1110       7353         868   AT&T 
 3967      955        363         474   Exodus Communication 
  705      925        377         404   UUNET Technologies, Inc. 
    1      873       8404         648   BBN Planet 
 1239      783       3169         606   Sprint 
 3908      764       1623         479   Supernet, Inc. 
 8010      719         62          12   PublicNet Communications, Inc
 7046      698        823         450   UUNET Technologies, Inc. 
  209      614       1861         297   Qwest 
 4323      586        364         201   Time Warner Communications, I
  852      578        977         381   Telus Advanced Communications
  690      529         76         316   Merit Network 
 2914      462       2212         433   Verio, Inc. 
 3549      404        837         202   Global Crossing 
 2149      403        214         337   Performance Systems, Inc. 
 7132      400        468         166   Southwestern Bell Internet Se
 3561      383       2269         330   Cable & Wireless USA 
  577      350        587         218   Bell Advanced Communications 
 3741      350        730         239   The Internet Solution 

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

  ASN   Net Savings Description
 8010      707      PublicNet Communications, Inc
  705      521      UUNET Technologies, Inc. 
 3967      481      Exodus Communication 
 1221      462      Telstra Pty Ltd
 4323      385      Time Warner Communications, I
 4151      326      USDA 
  209      317      Qwest 
 3908      285      Supernet, Inc. 
11371      271      Rhythms NetConnections 
 7046      248      UUNET Technologies, Inc. 
 7018      242      AT&T 
 6347      238      SAVVIS Communications Corpora
 7132      234      Southwestern Bell Internet Se
  702      231      UUNET Technologies, Inc. 
    1      225      BBN Planet 
  690      213      Merit Network 
 4755      213      Videsh Sanchar Nigam Ltd. Aut
 3549      202      Global Crossing 
 4355      198      EarthLink, Inc. 
  852      197      Telus Advanced Communications

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

Bad AS  Designation  Network              Transit AS  Description
65500   PRIVATE       62.40.11.0/24         8469       PIRONET NDH AG
 2027   UNALLOCATED   150.185.128.0/18      8143       Publicom Corp. 
65500   PRIVATE       195.227.39.0/24       8469       PIRONET NDH AG
65500   PRIVATE       195.227.73.0/24       8469       PIRONET NDH AG
65500   PRIVATE       195.227.79.0/24       8469       PIRONET NDH AG
65500   PRIVATE       195.227.88.0/24       8469       PIRONET NDH AG
 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 
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. 
153.34.0.0/15          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
191.9.200.0/24        1290     PSINet UK Ltd.
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       /10:7       /11:11      /12:37      
/13:90      /14:227     /15:390     /16:7078    /17:1375    /18:2466    
/19:7184    /20:6254    /21:4731    /22:7188    /23:8914    /24:60996   
/25:316     /26:302     /27:208     /28:173     /29:114     /30:147     
/31:0       /32:41      

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

  ASN   No of nets  Total ann.   Description
  701     1380          2159      UUNET Technologies, Inc. 
 1221     1358          1504      Telstra Pty Ltd
  705      808           925      UUNET Technologies, Inc. 
 3967      773           955      Exodus Communication 
  702      712          1095      UUNET Technologies, Inc. 
 8010      703           719      PublicNet Communications, Inc
 7018      577          1110      AT&T 
 7046      534           698      UUNET Technologies, Inc. 
 3908      527           764      Supernet, Inc. 
  690      526           529      Merit Network 
 4323      496           586      Time Warner Communications, I
 1239      449           783      Sprint 
    1      448           873      BBN Planet 
  209      444           614      Qwest 
  852      368           578      Telus Advanced Communications
 2764      354           399      connect.com.au pty ltd
  703      323           398      UUNET Technologies, Inc. 
 2149      306           403      Performance Systems, Inc. 
 4151      296           342      USDA 
 7474      275           310      Optus Communications Pty Ltd

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

   4:3         9:1        12:446      13:10       15:2        17:5      
  20:1        24:805      25:1        32:73       38:14       40:4      
  43:1        44:2        52:1        53:2        57:13       61:167    
  62:155      63:2370     64:1497     65:1019     66:744      67:17     
  68:6        80:131     128:61      129:112     130:24      131:43     
 132:14      133:2       134:127     135:10      136:120     137:107    
 138:63      139:30      140:102     141:57      142:65      143:44     
 144:55      145:12      146:216     147:95      148:155     149:88     
 150:41      151:38      152:391     153:34      154:6       155:83     
 156:85      157:120     158:70      159:77      160:45      161:54     
 162:84      163:130     164:125     165:100     166:206     167:162    
 168:115     169:48      170:299     171:2       191:1       192:5359   
 193:2074    194:2068    195:839     196:430     198:3759    199:3316   
 200:2407    201:1       202:2873    203:4533    204:3325    205:2174   
 206:2588    207:2679    208:2608    209:2945    210:570     211:151    
 212:953     213:556     214:9       215:15      216:2950    217:395    
 218:11     

End of report



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