Weekly Routing Table Report

Routing Analysis cscora at dev.apnic.net
Thu Apr 5 14:04:09 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   06 Apr, 2001

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

BGP routing table entries examined:                            102338
Origin ASes present in the Internet Routing Table:              10506
Origin ASes announcing only one prefix:                          3773
Transit ASes present in the Internet Routing Table:              1397
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:             17
Non-routable prefixes present in the Routing Table:                 0
Prefixes being announced from the IANA Reserved Address blocks:     3
Number of addresses announced to Internet:                 1218893376
    Equivalent to 72 /8s, 166 /16s and 214 /24s
    Percentage of available address space announced:             32.9
    Percentage of allocated address space announced:             64.5
    Percentage of available address space allocated:             51.0

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

Prefixes being announced by APNIC Region ASes:                  15577
Prefixes being announced from the APNIC address blocks:         14073
APNIC Region origin ASes present in the Internet Routing Table:  1222
APNIC Region origin ASes announcing only one prefix:              439
APNIC Region transit ASes present in the Internet Routing Table:  204
Average APNIC Region AS path length visible:                      5.1
    Max APNIC Region AS path length visible:                       15
Number of APNIC addresses announced to Internet:             69182459
    Equivalent to 4 /8s, 31 /16s and 163 /24s
    Percentage of available APNIC address space announced:       68.0

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:                   70742
Prefixes being announced from the ARIN address blocks:          48171
ARIN Region origin ASes present in the Internet Routing Table:   6397
ARIN Region origin ASes announcing only one prefix:              1876
ARIN Region transit ASes present in the Internet Routing Table:   658
Average ARIN Region AS path length visible:                       5.2
    Max ARIN Region AS path length visible:                        14
Number of ARIN addresses announced to Internet:             180496434
    Equivalent to 10 /8s, 194 /16s and 40 /24s
    Percentage of available ARIN address space announced:        82.8

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
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:                   16002
Prefixes being announced from the RIPE address blocks:          12681
RIPE Region origin ASes present in the Internet Routing Table:   2885
RIPE Region origin ASes announcing only one prefix:              1458
RIPE Region transit ASes present in the Internet Routing Table:   533
Average RIPE Region AS path length visible:                       6.0
    Max RIPE Region AS path length visible:                        15
Number of RIPE addresses announced to Internet:              96435151
    Equivalent to 5 /8s, 191 /16s and 123 /24s
    Percentage of available RIPE address space announced:        82.1

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, 193/8, 194/7, 212/7 and 217/8

APNIC Region per AS prefix count summary
----------------------------------------

  ASN   No of nets  /19 equiv  Description
 1221     2084        684       Telstra
 2764      431        139       connect.com.au pty ltd
  703      376        204       UUNET Technologies, Inc.
 2907      365        884       SINET Japan
 4755      291        108       VSNL India
 4538      243       1024       China Education and Research 
 7474      196         86       Optus Communications
 4134      183        615       Data Communications Bureau
 4763      177         34       Telstra New Zealand
 4766      177        618       KORnet Powered BY Korea Telec
 1237      164         71       System Engineering Research I
 7657      160         12       The Internet Group Limited
 7539      158        101       Delegated to TWNIC for subseq
 9269      156         22       Hong Kong CTI
 7545      152         10       TPG Internet Pty Ltd
17561      150         60       Internet service provision to
 4740      149         10       Ozemail
 4786      127          7       NetConnect Communications Pty
 7617      124         46       One.Net Pty Ltd
 9797      123         10       Asia Online Australia

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

  ASN   No of nets  /19 equiv  Description
  702      427        634       UUNET Technologies, Inc.
 3301      399        337       TeliaNet Sweden
 1257      279        247       Swipnet AB
 1270      278        448       UUNET Germany
  680      208        913       Deutschef Forschurgsnetz
 3215      203        227       RAIN
  719      190        146       LANLINK
 5515      190        336       Sonera Finland
  786      184        959       JANET IP Service
 3320      158        710       Deutsche Telekom AG
 1849      139        243       UUNET UK (formerly PIPEX)
  517      128        134       Xlink
 5400      124         33       Concert Internet Plus Europea
 3303      123        298       Swisscom
 2856      122        388       BTnet UK Regional network
 1290      115        206       PSINet UK Ltd.
 8708      113          5       Romania Data System
 1267       97        978       IUnet S.p.A
 1901       97         69       EUnet Austria
 2830       96         38       UUNET UK (formerly PIPEX)

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

  ASN   No of nets  /19 equiv  Description
  701     2419       3628       UUNET Technologies, Inc.
  705     1286         58       UUNET Technologies, Inc.
    1      967       4497       BBN Planet
 7018      948       3055       AT&T
 7046      809        552       UUNET Technologies, Inc.
 1239      642       1588       Sprint ICM-Inria
 2914      605       1219       Verio, Inc.
 3561      557       1249       Cable & Wireless USA
  174      556       2768       PSINet Inc.
 3549      540        496       Global Crossing
 4293      482         51       Cable & Wireless USA
  209      442        674       Qwest
  690      414         49       Merit Network
 2548      398        514       Digital Express Group, Inc.
 3908      382        262       Supernet, Inc.
 8112      372         76       Bell Atlantic Internet Soluti
 8151      365        218       UniNet S.A. de C.V.
 8013      339         55       PSINet Ltd. Canada
 4323      337        136       Time Warner Communications, I
 3967      332        223       Exodus Communication

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

  ASN   No of nets  /19 equiv  Description
  701     2419       3628       UUNET Technologies, Inc.
 1221     2084        684       Telstra
  705     1286         58       UUNET Technologies, Inc.
    1      967       4497       BBN Planet
 7018      948       3055       AT&T
 7046      809        552       UUNET Technologies, Inc.
 1239      642       1588       Sprint ICM-Inria
 2914      605       1219       Verio, Inc.
 3561      557       1249       Cable & Wireless USA
  174      556       2768       PSINet Inc.
 3549      540        496       Global Crossing
 4293      482         51       Cable & Wireless USA
  209      442        674       Qwest
 2764      431        139       connect.com.au pty ltd
  702      427        634       UUNET Technologies, Inc.
  690      414         49       Merit Network
 3301      399        337       TeliaNet Sweden
 2548      398        514       Digital Express Group, Inc.
 3908      382        262       Supernet, Inc.
  703      376        204       UUNET Technologies, Inc.

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

Bad AS  Designation  Network              Transit AS  Description
 2027   UNALLOCATED   150.185.0.0/16       10530       Interpacket Group, I
 2027   UNALLOCATED   150.185.128.0/18      8143       Publicom Corp.
 2027   UNALLOCATED   150.186.0.0/16       10530       Interpacket Group, I
 2027   UNALLOCATED   150.187.0.0/16       10530       Interpacket Group, I
 2027   UNALLOCATED   150.188.0.0/16       10530       Interpacket Group, I
 2027   UNALLOCATED   150.189.0.0/16       10530       Interpacket Group, I
 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, 
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
91.16.23.0/24        11770     Net56
106.1.1.0/24          5705     Sirius Solutions, Inc.
106.1.2.0/24          5705     Sirius Solutions, Inc.

Number of prefixes announced per prefix length (Global)
-------------------------------------------------------

 /1:0        /2:0        /3:0        /4:0        /5:0        /6:0       
 /7:0        /8:21       /9:4       /10:4       /11:10      /12:29      
/13:66      /14:204     /15:330     /16:6916    /17:1116    /18:2088    
/19:6536    /20:5007    /21:4411    /22:6680    /23:8570    /24:59077   
/25:260     /26:339     /27:146     /28:108     /29:67      /30:174     
/31:1       /32:174     

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

   9:3        12:351      13:10       15:1        17:1        24:700    
  26:1        32:10       38:7        44:3        47:1        53:2      
  55:1        57:9        61:28       62:134      63:1891     64:1422   
  65:652      66:216      91:1       106:2       128:31      129:122    
 130:20      131:25      132:11      133:1       134:152     135:8      
 136:17      137:115     138:247     139:52      140:108     141:172    
 142:55      143:151     144:37      145:9       146:134     147:92     
 148:149     149:134     150:26      151:360     152:874     153:33     
 154:13      155:75      156:38      157:103     158:61      159:79     
 160:18      161:56      162:91      163:135     164:128     165:126    
 166:174     167:135     168:80      169:30      170:210     171:2      
 192:5383    193:1867    194:2040    195:759     196:375     198:3642   
 199:3370    200:1889    202:2468    203:4958    204:3376    205:2254   
 206:2729    207:2784    208:2911    209:3208    210:495     211:171    
 212:816     213:379     214:9       215:11      216:2871    217:177    


End of report



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