Weekly Routing Table Report

Routing Analysis cscora at dev.apnic.net
Thu May 3 14:04:36 EDT 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   04 May, 2001

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

BGP routing table entries examined:                            103810
Origin ASes present in the Internet Routing Table:              10703
Origin ASes announcing only one prefix:                          3895
Transit ASes present in the Internet Routing Table:              1444
Average AS path length visible in the Internet Routing Table:     5.3
    Max AS path length visible:                                    15
Illegal AS announcements present in the Routing Table:             15
Non-routable prefixes present in the Routing Table:                 0
Prefixes being announced from the IANA Reserved Address blocks:     1
Number of addresses announced to Internet:                 1246077232
    Equivalent to 74 /8s, 69 /16s and 161 /24s
    Percentage of available address space announced:             33.6
    Percentage of allocated address space announced:             64.8
    Percentage of available address space allocated:             51.9

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

Prefixes being announced by APNIC Region ASes:                  15211
Prefixes being announced from the APNIC address blocks:         13775
APNIC Region origin ASes present in the Internet Routing Table:  1213
APNIC Region origin ASes announcing only one prefix:              437
APNIC Region transit ASes present in the Internet Routing Table:  206
Average APNIC Region AS path length visible:                      5.1
    Max APNIC Region AS path length visible:                       15
Number of APNIC addresses announced to Internet:             70563339
    Equivalent to 4 /8s, 52 /16s and 182 /24s
    Percentage of available APNIC address space announced:       69.4

APNIC AS Blocks        4608 - 4864, 7467 - 7722, 9216 - 10239, 17408 - 18431
APNIC Address Blocks   61/8, 202/7, 210/7 and 218/8

ARIN Region Analysis Summary
----------------------------

Prefixes being announced by ARIN Region ASes:                   71945
Prefixes being announced from the ARIN address blocks:          49729
ARIN Region origin ASes present in the Internet Routing Table:   6532
ARIN Region origin ASes announcing only one prefix:              1948
ARIN Region transit ASes present in the Internet Routing Table:   691
Average ARIN Region AS path length visible:                       5.2
    Max ARIN Region AS path length visible:                        14
Number of ARIN addresses announced to Internet:             186557918
    Equivalent to 11 /8s, 30 /16s and 165 /24s
    Percentage of available ARIN address space announced:        85.5

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
ARIN Address Blocks    63/8, 64/7, 66/8, 199/8, 200/8, 204/6, 208/7 and 216/8

RIPE Region Analysis Summary
----------------------------

Prefixes being announced by RIPE Region ASes:                   16639
Prefixes being announced from the RIPE address blocks:          12919
RIPE Region origin ASes present in the Internet Routing Table:   2956
RIPE Region origin ASes announcing only one prefix:              1508
RIPE Region transit ASes present in the Internet Routing Table:   546
Average RIPE Region AS path length visible:                       5.9
    Max RIPE Region AS path length visible:                        15
Number of RIPE addresses announced to Internet:              97641033
    Equivalent to 5 /8s, 209 /16s and 226 /24s
    Percentage of available RIPE address space announced:        64.7

RIPE AS Blocks         1877 - 1901, 2042, 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  /19 equiv  Description
 1221     1789        700       Telstra
 2764      432        147       connect.com.au pty ltd
  703      385        204       UUNET Technologies, Inc.
 2907      361        875       SINET Japan
 4755      315        110       VSNL India
 4538      243       1056       China Education and Research 
 7539      213         97       Delegated to TWNIC for subseq
 4134      194        632       Data Communications Bureau
 7474      190         85       Optus Communications
 7657      180         13       The Internet Group Limited
 1237      154         70       System Engineering Research I
 7545      153         10       TPG Internet Pty Ltd
17561      151         61       Internet service provision to
 4740      150         10       Ozemail
 4766      146        597       KORnet Powered BY Korea Telec
 4786      128          7       NetConnect Communications Pty
 9394      122         19       CHINA RAILWAY TELECOMMUNICATI
 9443      122         22       INTERNETPRIMUS-AS-A
 7586      121          9       Paradox Digital Pty. Ltd
 7617      121         46       One.Net Pty Ltd

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

  ASN   No of nets  /19 equiv  Description
  702      540        801       UUNET Technologies, Inc.
15870      458          3       Global Center Frankfurt
 3301      390        401       TeliaNet Sweden
 1257      278        263       Swipnet AB
 1270      265        440       UUNET Germany
  680      213        946       Deutschef Forschurgsnetz
 3215      209        221       RAIN
 5515      190        336       Sonera Finland
  719      189        146       LANLINK
  786      185        952       JANET IP Service
 3320      161        710       Deutsche Telekom AG
  517      129        136       Xlink
 5400      128         33       Concert Internet Plus Europea
 3303      122        296       Swisscom
 2856      121        396       BTnet UK Regional network
 8708      121          7       Romania Data System
 1290      102        204       PSINet UK Ltd.
 1267      100        978       IUnet S.p.A
 1901       92         77       EUnet Austria
 1849       89         79       UUNET UK (formerly PIPEX)

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

  ASN   No of nets  /19 equiv  Description
  701     2342       4448       UUNET Technologies, Inc.
  705     1138         54       UUNET Technologies, Inc.
 7018      980       3233       AT&T
    1      958       4464       BBN Planet
 7046      798        564       UUNET Technologies, Inc.
 1239      626       1605       Sprint ICM-Inria
 2914      598       1187       Verio, Inc.
 3561      545       1224       Cable & Wireless USA
18994      524          6       Crossing 
 3549      501        515       Global Crossing
 4293      475         51       Cable & Wireless USA
  209      447        718       Qwest
  174      428       2696       PSINet Inc.
 2548      407        506       Digital Express Group, Inc.
  690      391         49       Merit Network
 8151      366        228       UniNet S.A. de C.V.
 3908      354        268       Supernet, Inc.
 3602      346         72       Sprint Canada
 3967      339        228       Exodus Communication
 4323      337        136       Time Warner Communications, I

Global Per AS prefix count summary
----------------------------------

  ASN   No of nets  /19 equiv  Description
  701     2342       4448       UUNET Technologies, Inc.
 1221     1789        700       Telstra
  705     1138         54       UUNET Technologies, Inc.
 7018      980       3233       AT&T
    1      958       4464       BBN Planet
 7046      798        564       UUNET Technologies, Inc.
 1239      626       1605       Sprint ICM-Inria
 2914      598       1187       Verio, Inc.
 3561      545       1224       Cable & Wireless USA
  702      540        801       UUNET Technologies, Inc.
18994      524          6       Crossing 
 3549      501        515       Global Crossing
 4293      475         51       Cable & Wireless USA
15870      458          3       Global Center Frankfurt
  209      447        718       Qwest
 2764      432        147       connect.com.au pty ltd
  174      428       2696       PSINet Inc.
 2548      407        506       Digital Express Group, Inc.
  690      391         49       Merit Network
 3301      390        401       TeliaNet Sweden

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

Bad AS  Designation  Network              Transit AS  Description
60002   RESERVED      64.76.148.0/24       19583       CHILE S.A. 
 2027   UNALLOCATED   150.185.128.0/18      8143       Publicom Corp.
 1877   UNALLOCATED   192.108.196.0/24      1800       SPRINT
 1877   UNALLOCATED   192.108.209.0/24      1880       Stupi, house man's 
 1877   UNALLOCATED   192.108.210.0/24      1880       Stupi, house man's 
 1877   UNALLOCATED   192.108.214.0/24      1800       SPRINT
 5757   UNALLOCATED   192.239.13.0/24        701       UUNET Technologies, 
60002   RESERVED      200.9.98.0/24         6429       RdC Internet
60002   RESERVED      200.9.99.0/24         6429       RdC Internet
65535   PRIVATE       203.24.169.0/24      17486       Swiftel Communicatio
65500   PRIVATE       203.166.86.0/24      10084       Western Australian I
 5555   UNALLOCATED   205.110.64.0/24        721       DLA Systems Automati
 5555   UNALLOCATED   205.110.68.0/22        721       DLA Systems Automati
 5555   UNALLOCATED   205.110.72.0/21        721       DLA Systems Automati
 5757   UNALLOCATED   207.19.224.0/24        701       UUNET Technologies, 

Advertised IANA Reserved Addresses
----------------------------------

Network            Origin AS  Description
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        /8:22       /9:4       /10:5       /11:10      /12:29      
/13:71      /14:203     /15:333     /16:6925    /17:1145    /18:2113    
/19:6618    /20:5147    /21:4456    /22:6752    /23:8628    /24:59263   
/25:274     /26:441     /27:361     /28:378     /29:323     /30:246     
/31:1       /32:62      

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

   4:1         9:3        12:351      13:10       15:1        17:2      
  24:681      26:1        32:12       38:7        44:3        47:1      
  53:2        55:1        57:10       61:29       62:123      63:1914   
  64:1527     65:478      66:315     128:36      129:117     130:21     
 131:25      132:9       133:1       134:166     135:11      136:17     
 137:120     138:246     139:49      140:140     141:164     142:60     
 143:41      144:131     145:9       146:132     147:134     148:170    
 149:125     150:28      151:300     152:726     153:34      154:17     
 155:78      156:41      157:107     158:171     159:76      160:27     
 161:58      162:61      163:134     164:81      165:129     166:178    
 167:134     168:81      169:34      170:261     171:2       192:5384   
 193:1965    194:2075    195:779     196:401     198:3618    199:3377   
 200:1991    201:1       202:2418    203:4788    204:3342    205:2242   
 206:2766    207:2842    208:2950    209:3125    210:492     211:151    
 212:827     213:386     214:9       215:11      216:2966    217:203    


End of report



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