Weekly Routing Table Report

Routing Table Analysis cscora at thyme.apnic.net
Fri Feb 15 05:04:38 EST 2002


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   20:00 +10GMT Fri 15 Feb, 2002

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

BGP routing table entries examined:                            107865
    Prefixes after maximum aggregation:                         71870
    Unique aggregates announced to Internet:                    51605
Total ASes present in the Internet Routing Table:               12551
Origin-only ASes present in the Internet Routing Table:         10860
Origin ASes announcing only one prefix:                          4759
Transit ASes present in the Internet Routing Table:              1691
Transit-only ASes present in the Internet Routing Table:           55
Average AS path length visible in the Internet Routing Table:     5.4
    Max AS path length visible:                                    19
Illegal AS announcements present in the Routing Table:              2
Non-routable prefixes present in the Routing Table:                 0
Prefixes being announced from the IANA Reserved Address blocks:    14
Number of addresses announced to Internet:                 1172878088
    Equivalent to 69 /8s, 232 /16s and 179 /24s
    Percentage of available address space announced:             31.6
    Percentage of allocated address space announced:             59.9
    Percentage of available address space allocated:             52.8
Total number of prefixes smaller than registry allocations:     71809

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

Prefixes being announced by APNIC Region ASes:                  17369
    Total APNIC prefixes after maximum aggregation:             10575
Prefixes being announced from the APNIC address blocks:         15870
    Unique aggregates announced from the APNIC address blocks:   9270
APNIC Region origin ASes present in the Internet Routing Table:  1446
APNIC Region origin ASes announcing only one prefix:              480
APNIC Region transit ASes present in the Internet Routing Table:  254
Average APNIC Region AS path length visible:                      5.3
    Max APNIC Region AS path length visible:                       15
Number of APNIC addresses announced to Internet:             83565888
    Equivalent to 4 /8s, 251 /16s and 29 /24s
    Percentage of available APNIC address space announced:       61.8

APNIC AS Blocks        4608 - 4864, 7467 - 7722, 9216 - 10239
                       17408 - 18431, 23552 - 24575
APNIC Address Blocks   61/8, 202/7, 210/7, 218/7 and 220/8

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

Prefixes being announced by ARIN Region ASes:                   72603
    Total ARIN prefixes after maximum aggregation:              47272
Prefixes being announced from the ARIN address blocks:          51295
    Unique aggregates announced from the ARIN address blocks:   17275
ARIN Region origin ASes present in the Internet Routing Table:   7429
ARIN Region origin ASes announcing only one prefix:              2313
ARIN Region transit ASes present in the Internet Routing Table:   768
Average ARIN Region AS path length visible:                       5.2
    Max ARIN Region AS path length visible:                        16
Number of ARIN addresses announced to Internet:             186573124
    Equivalent to 11 /8s, 30 /16s and 225 /24s
    Percentage of available ARIN address space announced:        69.5

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, 21504 - 23551
ARIN Address Blocks    24/8, 63/8, 64/6, 68/8, 199/8, 200/8, 204/6,
                       208/7 and 216/8

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

Prefixes being announced by RIPE Region ASes:                   17893
    Total RIPE prefixes after maximum aggregation:              14023
Prefixes being announced from the RIPE address blocks:          14698
    Unique aggregates announced from the RIPE address blocks:    9419
RIPE Region origin ASes present in the Internet Routing Table:   3620
RIPE Region origin ASes announcing only one prefix:              1966
RIPE Region transit ASes present in the Internet Routing Table:   655
Average RIPE Region AS path length visible:                       5.8
    Max RIPE Region AS path length visible:                        19
Number of RIPE addresses announced to Internet:             110064128
    Equivalent to 6 /8s, 143 /16s and 114 /24s
    Percentage of available RIPE address space announced:        72.9

RIPE AS Blocks         1877 - 1901, 2043, 2047, 2107 - 2136, 2585 - 2614
                       2773 - 2822, 2830 - 2879, 3154 - 3353, 5377 - 5631
                       6656 - 6911, 8192 - 9215, 12288 - 13311, 15360 - 16383
                       20480 - 21503, 24576 - 25599
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  /20 equiv  MaxAgg  Description
 1221     1314       1258         959   Telstra Pty Ltd
 4538      454       1162          16   China Education and Research 
  703      403        359         309   UUNET Technologies, Inc. 
 2907      399       1942         366   SINET Japan
 2764      389        361         364   connect.com.au pty ltd
 7474      300        289         203   Optus Communications Pty Ltd
 4134      270       1874          98   Data Communications Bureau
 4755      265        111          82   Videsh Sanchar Nigam Ltd. Aut
 9394      243        112           3   CHINA RAILWAY Internet(CRNET)
 4766      205       1393         145   Korea Internet Exchange for "
 7539      161        204         155   TANet2, sponsored by NSC, TAI
 9443      157         44          58   Primus Telecommunications
 9768      146        385          88   Korea Telecom
 4804      144         84          68   Microplex PTY LTD
 9583      134         32           5   Satyam Infoway Ltd.,
 7657      122         22          85   The Internet Group Limited
 4713      117        914         103   NTT Communications Corporatio
 4780      115        186          40   Digital United Inc.
 9800      115       4231          13   CHINA UNICOM
17676      115       1840          17   XTAGE CORPORATION

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
  702     1073       2617         860   UUNET Technologies, Inc. 
 3301      398        924         351   TeliaNet Sweden
 1257      256        487         247   SWIPnet Swedish IP Network
 3215      242        570         156   France Telecom / &Equant
  680      232       2147         230   DFN-IP service G-WiN
 5515      214        689         172   Sonera Finland Autonomous Sys
 5400      200         83          95   Concert European Core Network
 3320      196       1964         172   Deutsche Telekom AG
  786      182       1874         182   The JANET IP Service
  719      167        305         121   LANLINK autonomous system
 8708      155         21         144   Romania Data Systems S.A.
 2856      130        790         119   BTnet UK Regional network
 3303      123        577         123   Swisscom Ltd
 3269      117        693          71   TELECOM ITALIA
12302      115          7          36   MobiFon S.A.
 8297      114         40          64   Teleglobe Autonomous System i
  517      100        226          98   KPNQwest Germany GmbH
 5511       94        193          83   France Telecom
 1267       91       1471          41   Infostrada S.p.A.
 2830       89        210          71   UUNET Dual-Homed customers

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
  701     2105       8429        1502   UUNET Technologies, Inc. 
 7018     1230       7498         929   AT&T 
 3908      828       1676         479   Supernet, Inc. 
    1      827       8103         599   BBN Planet 
 1239      806       3340         622   Sprint 
 4323      648        433         243   Time Warner Communications, I
  852      615       1125         407   Telus Advanced Communications
 7046      612        849         413   UUNET Technologies, Inc. 
  209      535       1908         305   Qwest 
 7132      456        510         164   Southwestern Bell Internet Se
 2914      452       2193         420   Verio, Inc. 
 3549      438        821         224   Global Crossing 
  690      437         66         283   Merit Network 
  705      383        114         271   UUNET Technologies, Inc. 
 2149      374        209         313   Performance Systems, Inc. 
 3561      365       2220         320   Cable & Wireless USA 
  577      353        588         219   Bell Advanced Communications 
 7843      349        290          50   Adelphia Corp. 
 3741      344        730         235   The Internet Solution 
 2386      333        355         191   AT&T Data Communications Serv

Global Per AS Maximum Aggr summary
----------------------------------

  ASN   No of nets  Net Savings Description
 4538       454         438      China Education and Research 
 4323       648         405      Time Warner Communications, I
 1221      1314         355      Telstra Pty Ltd
 3908       828         349      Supernet, Inc. 
 7018      1230         301      AT&T 
 7843       349         299      Adelphia Corp. 
 7132       456         292      Southwestern Bell Internet Se
 4151       304         288      USDA 
11371       278         271      Rhythms NetConnections 
 9394       243         240      CHINA RAILWAY Internet(CRNET)
 6347       316         238      SAVVIS Communications Corpora
  209       535         230      Qwest 
    1       827         228      BBN Planet 
 3549       438         214      Global Crossing 
  702      1073         213      UUNET Technologies, Inc. 
  852       615         208      Telus Advanced Communications
 4355       244         205      EarthLink, Inc. 
 6198       301         204      BellSouth Network Solutions, 
 1580       211         200      HQ, 5th Signal Command 
 7046       612         199      UUNET Technologies, Inc. 

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

Bad AS  Designation  Network              Transit AS  Description
 1877   UNALLOCATED   192.108.201.0/24      1880       Stupi, house man's p
 5757   UNALLOCATED   207.19.224.0/24        701       UUNET Technologies, 

Advertised Unregistered Addresses
---------------------------------

Network            Origin AS  Description
39.0.0.0/8            4554     Exchange Point Blocks 
96.0.0.0/20           3549     Global Crossing 
132.0.0.0/10           568     DISO-UNRRA 
134.137.0.0/16        7170     AT&T Government Markets 
135.0.0.0/13         10455     Lucent Technologies 
137.0.0.0/13           568     DISO-UNRRA 
138.94.0.0/16            1     BBN Planet 
144.7.0.0/16           701     UUNET Technologies, Inc. 
153.36.0.0/14          701     UUNET Technologies, Inc. 
154.150.0.0/16        6494     IDCI 
158.0.0.0/13           568     DISO-UNRRA 
164.233.0.0/16        6020     DISA NETWORK SERVICES 
164.235.0.0/16        6025     US DOD NIC Unregistered
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       /9:6       /10:7       /11:12      /12:37      
/13:91      /14:231     /15:394     /16:7146    /17:1430    /18:2506    
/19:7380    /20:6738    /21:4794    /22:7273    /23:8918    /24:59954   
/25:220     /26:251     /27:121     /28:85      /29:85      /30:125     
/31:0       /32:41      

Advertised prefixes smaller than registry allocations
-----------------------------------------------------

  ASN   No of nets  Total ann.   Description
  701     1354          2105      UUNET Technologies, Inc. 
 1221     1168          1314      Telstra Pty Ltd
  702      698          1073      UUNET Technologies, Inc. 
 7018      644          1230      AT&T 
 3908      582           828      Supernet, Inc. 
 4323      529           648      Time Warner Communications, I
 1239      476           806      Sprint 
 7046      437           612      UUNET Technologies, Inc. 
  690      433           437      Merit Network 
    1      426           827      BBN Planet 
  852      374           615      Telus Advanced Communications
  209      356           535      Qwest 
 2764      345           389      connect.com.au pty ltd
  705      330           383      UUNET Technologies, Inc. 
  703      327           403      UUNET Technologies, Inc. 
 3549      306           438      Global Crossing 
 2149      283           374      Performance Systems, Inc. 
 6197      275           328      BellSouth Network Solutions, 
 7066      275           304      Virginia Polytechnic Institut
11371      272           278      Rhythms NetConnections 

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

   4:1         9:1        12:482      13:10       15:1        17:5      
  20:5        24:750      25:1        32:68       38:9        40:6      
  44:1        57:14       61:227      62:170      63:1886     64:1109   
  65:1031     66:695      67:33       68:5        80:188      81:4      
 128:63      129:120     130:21      131:57      132:11      133:3      
 134:128     135:10      136:245     137:106     138:148     139:47     
 140:162     141:61      142:67      143:37      144:155     145:12     
 146:217     147:154     148:146     149:91      150:40      151:45     
 152:302     153:32      154:7       155:83      156:77      157:82     
 158:81      159:88      160:24      161:54      162:102     163:114    
 164:94      165:124     166:222     167:168     168:114     169:49     
 170:292     171:2       192:5423    193:2116    194:2010    195:784    
 196:445     198:3736    199:3239    200:2319    201:1       202:2889   
 203:4436    204:3312    205:2163    206:2534    207:2619    208:2574   
 209:2829    210:531     211:158     212:882     213:558     214:9      
 215:18      216:2962    217:438     218:10     

End of report



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