Weekly Routing Table Report

Routing Analysis cscora at dev.apnic.net
Thu May 24 14:08:32 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   25 May, 2001

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

BGP routing table entries examined:                            107404
Origin ASes present in the Internet Routing Table:              10929
Origin ASes announcing only one prefix:                          3984
Transit ASes present in the Internet Routing Table:              1455
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:             12
Non-routable prefixes present in the Routing Table:                 1
Prefixes being announced from the IANA Reserved Address blocks:     1
Number of addresses announced to Internet:                 1233069767
    Equivalent to 73 /8s, 127 /16s and 38 /24s
    Percentage of available address space announced:             33.3
    Percentage of allocated address space announced:             64.1
    Percentage of available address space allocated:             51.9

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

Prefixes being announced by APNIC Region ASes:                  16033
Prefixes being announced from the APNIC address blocks:         14563
APNIC Region origin ASes present in the Internet Routing Table:  1254
APNIC Region origin ASes announcing only one prefix:              440
APNIC Region transit ASes present in the Internet Routing Table:  207
Average APNIC Region AS path length visible:                      5.1
    Max APNIC Region AS path length visible:                       15
Number of APNIC addresses announced to Internet:             72564802
    Equivalent to 4 /8s, 83 /16s and 64 /24s
    Percentage of available APNIC address space announced:       71.3

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:                   74761
Prefixes being announced from the ARIN address blocks:          51334
ARIN Region origin ASes present in the Internet Routing Table:   6654
ARIN Region origin ASes announcing only one prefix:              1974
ARIN Region transit ASes present in the Internet Routing Table:   695
Average ARIN Region AS path length visible:                       5.2
    Max ARIN Region AS path length visible:                        12
Number of ARIN addresses announced to Internet:             185144122
    Equivalent to 11 /8s, 9 /16s and 19 /24s
    Percentage of available ARIN address space announced:        84.9

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 - 22527
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:                   16598
Prefixes being announced from the RIPE address blocks:          12969
RIPE Region origin ASes present in the Internet Routing Table:   3018
RIPE Region origin ASes announcing only one prefix:              1564
RIPE Region transit ASes present in the Internet Routing Table:   551
Average RIPE Region AS path length visible:                       5.8
    Max RIPE Region AS path length visible:                        16
Number of RIPE addresses announced to Internet:              98700450
    Equivalent to 5 /8s, 226 /16s and 12 /24s
    Percentage of available RIPE address space announced:        65.4

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     1739        665       Telstra
 2764      899        175       connect.com.au pty ltd
 2907      365        884       SINET Japan
  703      347        204       UUNET Technologies, Inc.
 4755      340        110       VSNL India
 4538      247       1049       China Education and Research 
 7539      206         91       TANet2, sponsored by NSC, TAI
 4134      198        638       Data Communications Bureau
 7474      192         86       Optus Communications
 4740      185         12       Ozemail
 4766      176        635       KORnet Powered BY Korea Telec
 7657      162         13       The Internet Group Limited
 7545      153         11       TPG Internet Pty Ltd
 1237      152         70       System Engineering Research I
17561      151         68       Internet service provision to
 9443      126         24       INTERNETPRIMUS-AS-A
 4786      125          7       NetConnect Communications Pty
 9394      125         18       CHINA RAILWAY TELECOMMUNICATI
 7617      119         46       One.Net Pty Ltd
 7586      116          5       Paradox Digital Pty. Ltd

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

  ASN   No of nets  /19 equiv  Description
  702      625        852       UUNET Technologies, Inc.
15870      447          4       Global Center Frankfurt
 3301      392        401       TeliaNet Sweden
 1257      278        251       Swipnet AB
 1270      262        440       UUNET Germany
  680      227       1011       Deutschef Forschurgsnetz
 3215      217        235       RAIN
  719      186        146       LANLINK
  786      186        952       JANET IP Service
 5515      175        319       Sonera Finland
 3320      163        709       Deutsche Telekom AG
 5400      132         34       Concert Internet Plus Europea
  517      128        136       Xlink
 8708      126          7       Romania Data System
 2856      117        388       BTnet UK Regional network
 3303      116        279       Swisscom
 1267      100        978       IUnet S.p.A
 1290       98        203       PSINet UK Ltd.
 1901       92         77       EUnet Austria
 8342       88         44       Rostelecom Internet Center's 

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

  ASN   No of nets  /19 equiv  Description
  701     2398       3758       UUNET Technologies, Inc.
 7018     1853       3372       AT&T
  705     1244         57       UUNET Technologies, Inc.
    1      923       4458       BBN Planet
 7046      796        564       UUNET Technologies, Inc.
 3491      675        196       CAIS Internet
 1239      656       1612       Sprint ICM-Inria
 2914      587       1174       Verio, Inc.
 3561      542       1216       Cable & Wireless USA
 4293      497         51       Cable & Wireless USA
18994      474          5       Global Crossing 
  690      463         39       Merit Network
  209      462        914       Qwest
 2548      406        498       Digital Express Group, Inc.
 3908      390        265       Supernet, Inc.
  174      349       2597       PSINet Inc.
 3549      345        524       Global Crossing
 4323      340        140       Time Warner Communications, I
11371      337         50       Rhythms NetConnections
 5106      336         67       Ameritech Advanced Data Servi

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

  ASN   No of nets  /19 equiv  Description
  701     2398       3758       UUNET Technologies, Inc.
 7018     1853       3372       AT&T
 1221     1739        665       Telstra
  705     1244         57       UUNET Technologies, Inc.
    1      923       4458       BBN Planet
 2764      899        175       connect.com.au pty ltd
 7046      796        564       UUNET Technologies, Inc.
 3491      675        196       CAIS Internet
 1239      656       1612       Sprint ICM-Inria
  702      625        852       UUNET Technologies, Inc.
 2914      587       1174       Verio, Inc.
 3561      542       1216       Cable & Wireless USA
 4293      497         51       Cable & Wireless USA
18994      474          5       Global Crossing 
  690      463         39       Merit Network
  209      462        914       Qwest
15870      447          4       Global Center Frankfurt
 2548      406        498       Digital Express Group, Inc.
 3301      392        401       TeliaNet Sweden
 3908      390        265       Supernet, Inc.

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

Bad AS  Designation  Network              Transit AS  Description
60002   RESERVED      64.76.148.0/24       19583       IMPSAT 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, 
 9242   UNALLOCATED   202.3.6.0/23          4515       Star Internet Servic
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
 5757   UNALLOCATED   207.19.224.0/24        701       UUNET Technologies, 

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix             Origin AS  Description
172.16.0.1/32          703     UUNET Technologies, Inc.

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        /8:20       /9:5       /10:6       /11:9       /12:31      
/13:75      /14:206     /15:342     /16:6933    /17:1163    /18:2163    
/19:6670    /20:5262    /21:4550    /22:6863    /23:8791    /24:61903   
/25:263     /26:456     /27:459     /28:473     /29:389     /30:318     
/31:1       /32:53      

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

   9:3        12:726      13:10       15:1        17:2        24:699    
  26:1        32:125      38:573      44:3        47:1        53:2      
  55:1        57:13       61:34       62:137      63:1975     64:1692   
  65:708      66:330     128:37      129:110     130:23      131:39     
 132:9       133:1       134:169     135:12      136:16      137:122    
 138:243     139:46      140:135     141:157     142:69      143:41     
 144:140     145:9       146:140     147:135     148:96      149:120    
 150:35      151:298     152:585     153:32      154:20      155:82     
 156:48      157:103     158:178     159:78      160:27      161:53     
 162:68      163:138     164:90      165:123     166:185     167:139    
 168:90      169:35      170:258     171:4       192:5433    193:1866   
 194:2041    195:743     196:401     198:3683    199:3401    200:2122   
 201:1       202:2457    203:4975    204:3365    205:2254    206:2836   
 207:2993    208:3033    209:3216    210:756     211:177     212:866    
 213:407     214:9       215:11      216:3038    217:245    

End of report



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