Weekly Routing Table Report

Routing Analysis cscora at dev.apnic.net
Thu Mar 29 13:04:03 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   30 Mar, 2001

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

BGP routing table entries examined:                            102113
Origin ASes present in the Internet Routing Table:              10430
Origin ASes announcing only one prefix:                          3741
Transit ASes present in the Internet Routing Table:              1375
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:                 1214667866
    Equivalent to 72 /8s, 102 /16s and 92 /24s
    Percentage of available address space announced:             32.8
    Percentage of allocated address space announced:             64.3
    Percentage of available address space allocated:             51.0

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

Prefixes being announced by APNIC Region ASes:                  15583
Prefixes being announced from the APNIC address blocks:         14173
APNIC Region origin ASes present in the Internet Routing Table:  1211
APNIC Region origin ASes announcing only one prefix:              435
APNIC Region transit ASes present in the Internet Routing Table:  198
Average APNIC Region AS path length visible:                      5.1
    Max APNIC Region AS path length visible:                       15
Number of APNIC addresses announced to Internet:             69169775
    Equivalent to 4 /8s, 31 /16s and 114 /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:                   70655
Prefixes being announced from the ARIN address blocks:          47994
ARIN Region origin ASes present in the Internet Routing Table:   6353
ARIN Region origin ASes announcing only one prefix:              1858
ARIN Region transit ASes present in the Internet Routing Table:   651
Average ARIN Region AS path length visible:                       5.2
    Max ARIN Region AS path length visible:                        14
Number of ARIN addresses announced to Internet:             179855217
    Equivalent to 10 /8s, 184 /16s and 95 /24s
    Percentage of available ARIN address space announced:        82.5

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:                   15858
Prefixes being announced from the RIPE address blocks:          12560
RIPE Region origin ASes present in the Internet Routing Table:   2866
RIPE Region origin ASes announcing only one prefix:              1448
RIPE Region transit ASes present in the Internet Routing Table:   524
Average RIPE Region AS path length visible:                       6.0
    Max RIPE Region AS path length visible:                        15
Number of RIPE addresses announced to Internet:              93806295
    Equivalent to 5 /8s, 151 /16s and 94 /24s
    Percentage of available RIPE address space announced:        79.9

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     2083        692       Telstra
  703      451        264       UUNET Technologies, Inc.
 2764      429        139       connect.com.au pty ltd
 2907      373        892       SINET Japan
 4755      296        110       VSNL India
 4538      244       1032       China Education and Research 
 9269      206         24       Hong Kong CTI
 7474      195         86       Optus Communications
 4134      182        603       Data Communications Bureau
 4763      179         35       Telstra New Zealand
 4766      178        626       KORnet Powered BY Korea Telec
 1237      168         71       System Engineering Research I
 7657      164         12       The Internet Group Limited
 7545      150         10       TPG Internet Pty Ltd
 4740      145         10       Ozemail
 3462      138        205       Data Communications Institute
 4786      128          7       NetConnect Communications Pty
 4713      126        427       NTT-OCNET
 7539      124         38       Delegated to TWNIC for subseq
 7617      123         46       One.Net Pty Ltd

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

  ASN   No of nets  /19 equiv  Description
  702      417        624       UUNET Technologies, Inc.
 3301      395        329       TeliaNet Sweden
 1257      287        248       Swipnet AB
 1270      276        455       UUNET Germany
  680      208        913       Deutschef Forschurgsnetz
 3215      202        227       RAIN
 5515      191        335       Sonera Finland
  719      190        146       LANLINK
  786      183        959       JANET IP Service
 3320      157        454       Deutsche Telekom AG
 1849      149        255       UUNET UK (formerly PIPEX)
  517      128        134       Xlink
 3303      124        298       Swisscom
 5400      124         33       Concert Internet Plus Europea
 2856      122        388       BTnet UK Regional network
 8708      105          5       Romania Data System
 1901       99         77       EUnet Austria
 1267       98        979       IUnet S.p.A
 2830       95         38       UUNET UK (formerly PIPEX)
 1290       85        205       PSINet UK Ltd.

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

  ASN   No of nets  /19 equiv  Description
  701     2442       3623       UUNET Technologies, Inc.
  705     1183         55       UUNET Technologies, Inc.
    1      968       4504       BBN Planet
 7018      948       3057       AT&T
 7046      803        544       UUNET Technologies, Inc.
 1239      636       1600       Sprint ICM-Inria
 2914      610       1222       Verio, Inc.
  174      582       2777       PSINet Inc.
 3561      558       1240       Cable & Wireless USA
 3549      540        496       Global Crossing
 4293      477         52       Cable & Wireless USA
  209      450        723       Qwest
  690      404         64       Merit Network
 2548      397        514       Digital Express Group, Inc.
 3908      378        270       Supernet, Inc.
 8112      370         64       Bell Atlantic Internet Soluti
 4323      338        136       Time Warner Communications, I
 8151      329        191       UniNet S.A. de C.V.
11371      329         49       Rhythms NetConnections
 3967      328        222       Exodus Communication

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

  ASN   No of nets  /19 equiv  Description
  701     2442       3623       UUNET Technologies, Inc.
 1221     2083        692       Telstra
  705     1183         55       UUNET Technologies, Inc.
    1      968       4504       BBN Planet
 7018      948       3057       AT&T
 7046      803        544       UUNET Technologies, Inc.
 1239      636       1600       Sprint ICM-Inria
 2914      610       1222       Verio, Inc.
  174      582       2777       PSINet Inc.
 3561      558       1240       Cable & Wireless USA
 3549      540        496       Global Crossing
 4293      477         52       Cable & Wireless USA
  703      451        264       UUNET Technologies, Inc.
  209      450        723       Qwest
 2764      429        139       connect.com.au pty ltd
  702      417        624       UUNET Technologies, Inc.
  690      404         64       Merit Network
 2548      397        514       Digital Express Group, Inc.
 3301      395        329       TeliaNet Sweden
 3908      378        270       Supernet, 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, 
65008   PRIVATE       193.48.190.0/24       2200       INRIA-Rocquencourt
65008   PRIVATE       193.49.4.0/24         2200       INRIA-Rocquencourt
65008   PRIVATE       194.167.0.0/24        2200       INRIA-Rocquencourt
65535   PRIVATE       203.24.169.0/24      17486       Swiftel Communicatio
65500   PRIVATE       203.166.86.0/24      10084       Western Australian I
 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       /11:9       /12:30      
/13:64      /14:202     /15:328     /16:6907    /17:1108    /18:2079    
/19:6515    /20:4962    /21:4391    /22:6761    /23:8638    /24:58825   
/25:269     /26:345     /27:146     /28:111     /29:73      /30:160     
/31:1       /32:160     

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

   9:3        12:340      13:10       15:1        17:1        24:687    
  26:1        32:10       38:7        44:3        47:1        53:2      
  55:1        57:9        61:41       62:134      63:1883     64:1429   
  65:541      66:209      91:1       106:2       128:31      129:122    
 130:21      131:24      132:11      133:1       134:147     135:8      
 136:16      137:114     138:246     139:52      140:106     141:174    
 142:55      143:150     144:35      145:11      146:134     147:92     
 148:143     149:136     150:25      151:362     152:968     153:33     
 154:13      155:75      156:37      157:107     158:59      159:79     
 160:17      161:56      162:90      163:134     164:134     165:118    
 166:173     167:90      168:81      169:31      170:220     171:2      
 192:5350    193:1827    194:2038    195:774     196:381     198:3619   
 199:3364    200:1876    202:2435    203:4976    204:3374    205:2241   
 206:2747    207:2793    208:2932    209:3183    210:487     211:169    
 212:810     213:351     214:8       215:11      216:2865    217:165    


End of report



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