Weekly Routing Table Report

Routing Analysis cscora at dev.apnic.net
Thu May 10 14:05:19 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   11 May, 2001

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

BGP routing table entries examined:                            105792
Origin ASes present in the Internet Routing Table:              10804
Origin ASes announcing only one prefix:                          3935
Transit ASes present in the Internet Routing Table:              1445
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:             16
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:                 1263460384
    Equivalent to 75 /8s, 78 /16s and 224 /24s
    Percentage of available address space announced:             34.1
    Percentage of allocated address space announced:             65.7
    Percentage of available address space allocated:             51.9

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

Prefixes being announced by APNIC Region ASes:                  15441
Prefixes being announced from the APNIC address blocks:         14012
APNIC Region origin ASes present in the Internet Routing Table:  1249
APNIC Region origin ASes announcing only one prefix:              445
APNIC Region transit ASes present in the Internet Routing Table:  209
Average APNIC Region AS path length visible:                      5.1
    Max APNIC Region AS path length visible:                       16
Number of APNIC addresses announced to Internet:             70917987
    Equivalent to 4 /8s, 58 /16s and 31 /24s
    Percentage of available APNIC address space announced:       69.7

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:                   73634
Prefixes being announced from the ARIN address blocks:          50662
ARIN Region origin ASes present in the Internet Routing Table:   6580
ARIN Region origin ASes announcing only one prefix:              1970
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:                        13
Number of ARIN addresses announced to Internet:             183888365
    Equivalent to 10 /8s, 245 /16s and 233 /24s
    Percentage of available ARIN address space announced:        84.3

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
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:                   16701
Prefixes being announced from the RIPE address blocks:          13038
RIPE Region origin ASes present in the Internet Routing Table:   2972
RIPE Region origin ASes announcing only one prefix:              1516
RIPE Region transit ASes present in the Internet Routing Table:   544
Average RIPE Region AS path length visible:                       5.9
    Max RIPE Region AS path length visible:                        15
Number of RIPE addresses announced to Internet:             114898378
    Equivalent to 6 /8s, 217 /16s and 53 /24s
    Percentage of available RIPE address space announced:        76.1

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     1766        707       Telstra
 2764      430        147       connect.com.au pty ltd
  703      381        205       UUNET Technologies, Inc.
 2907      363        883       SINET Japan
 4755      328        112       VSNL India
 4538      243       1049       China Education and Research 
 7539      209         90       Delegated to TWNIC for subseq
 7657      206         14       The Internet Group Limited
 7474      193         86       Optus Communications
 4134      192        632       Data Communications Bureau
 7545      154         10       TPG Internet Pty Ltd
17561      152         69       Internet service provision to
 1237      148         50       System Engineering Research I
 4766      147        598       KORnet Powered BY Korea Telec
 4740      140         10       Ozemail
 4786      126          7       NetConnect Communications Pty
 9443      125         23       INTERNETPRIMUS-AS-A
 7586      123          9       Paradox Digital Pty. Ltd
 9394      122         19       CHINA RAILWAY TELECOMMUNICATI
 4736      120         17       Magna Data

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

  ASN   No of nets  /19 equiv  Description
  702      543        803       UUNET Technologies, Inc.
15870      446          3       Global Center Frankfurt
 3301      390        401       TeliaNet Sweden
 1257      278        263       Swipnet AB
 1270      266        440       UUNET Germany
 3215      213        224       RAIN
  680      212        938       Deutschef Forschurgsnetz
 5515      193        336       Sonera Finland
  719      187        146       LANLINK
  786      185        952       JANET IP Service
 3320      162        710       Deutsche Telekom AG
  517      131        137       Xlink
 5400      129         33       Concert Internet Plus Europea
 8708      127          7       Romania Data System
 3303      122        296       Swisscom
 2856      120        396       BTnet UK Regional network
 1290      102        204       PSINet UK Ltd.
 1267      100        978       IUnet S.p.A
 1901       92         77       EUnet Austria
 1849       91         79       UUNET UK (formerly PIPEX)

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

  ASN   No of nets  /19 equiv  Description
  701     2381       3908       UUNET Technologies, Inc.
  705     1143         54       UUNET Technologies, Inc.
 7018     1019       3283       AT&T
    1      955       4464       BBN Planet
 7046      802        565       UUNET Technologies, Inc.
 3491      694        181       CAIS Internet
 1239      635       1606       Sprint ICM-Inria
 2914      598       1185       Verio, Inc.
 3561      544       1215       Cable & Wireless USA
 3549      507        524       Global Crossing
 4293      501         52       Cable & Wireless USA
18994      493          5       Global Crossing 
  690      463         54       Merit Network
  209      459        726       Qwest
 2548      410        506       Digital Express Group, Inc.
  174      405       2695       PSINet Inc.
 3908      384        233       Supernet, Inc.
 3602      358         73       Sprint Canada
 3967      340        228       Exodus Communication
 4323      340        136       Time Warner Communications, I

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

  ASN   No of nets  /19 equiv  Description
  701     2381       3908       UUNET Technologies, Inc.
 1221     1766        707       Telstra
  705     1143         54       UUNET Technologies, Inc.
 7018     1019       3283       AT&T
    1      955       4464       BBN Planet
 7046      802        565       UUNET Technologies, Inc.
 3491      694        181       CAIS Internet
 1239      635       1606       Sprint ICM-Inria
 2914      598       1185       Verio, Inc.
 3561      544       1215       Cable & Wireless USA
  702      543        803       UUNET Technologies, Inc.
 3549      507        524       Global Crossing
 4293      501         52       Cable & Wireless USA
18994      493          5       Global Crossing 
  690      463         54       Merit Network
  209      459        726       Qwest
15870      446          3       Global Center Frankfurt
 2764      430        147       connect.com.au pty ltd
 2548      410        506       Digital Express Group, Inc.
  174      405       2695       PSINet Inc.

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
17441   UNALLOCATED   203.131.192.0/24      6347       SAVVIS Communication
65502   PRIVATE       203.166.83.0/24      10084       Western Australian I
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       /9:5       /10:6       /11:9       /12:30      
/13:74      /14:205     /15:341     /16:6943    /17:1151    /18:2133    
/19:6648    /20:5186    /21:4524    /22:6813    /23:8728    /24:60541   
/25:313     /26:512     /27:432     /28:450     /29:377     /30:286     
/31:1       /32:62      

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

   9:3        12:364      13:10       15:1        17:2        24:689    
  26:1        32:12       38:593      44:3        47:1        53:2      
  55:1        57:11       61:30       62:122      63:1946     64:1613   
  65:527      66:315     128:35      129:111     130:23      131:36     
 132:9       133:1       134:169     135:11      136:16      137:121    
 138:247     139:49      140:141     141:166     142:61      143:41     
 144:136     145:9       146:136     147:135     148:96      149:123    
 150:27      151:300     152:700     153:36      154:17      155:78     
 156:43      157:107     158:172     159:76      160:27      161:56     
 162:62      163:134     164:96      165:126     166:178     167:138    
 168:79      169:34      170:264     171:2       192:5446    193:1957   
 194:2074    195:783     196:398     198:3650    199:3392    200:2020   
 201:1       202:2458    203:4810    204:3378    205:2253    206:2837   
 207:2904    208:2981    209:3138    210:503     211:155     212:873    
 213:403     214:9       215:12      216:3015    217:221    

End of report



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