Weekly Routing Table Report

Routing Table Analysis cscora at thyme.apnic.net
Thu Nov 22 13:03:43 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   04:00 23 Nov, 2001

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

BGP routing table entries examined:                            107582
Total ASes present in the Internet Routing Table:               12122
Origin-only ASes present in the Internet Routing Table:         10534
Origin ASes announcing only one prefix:                          4519
Transit ASes present in the Internet Routing Table:              1588
Transit-only ASes present in the Internet Routing Table:           49
Average AS path length visible in the Internet Routing Table:     5.3
    Max AS path length visible:                                    19
Illegal AS announcements present in the Routing Table:              9
Non-routable prefixes present in the Routing Table:                 0
Prefixes being announced from the IANA Reserved Address blocks:    15
Number of addresses announced to Internet:                 1256253460
    Equivalent to 74 /8s, 224 /16s and 232 /24s
    Percentage of available address space announced:             33.9
    Percentage of allocated address space announced:             64.7
    Percentage of available address space allocated:             52.4
Total number of prefixes smaller than registry allocations:     72790

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

Prefixes being announced by APNIC Region ASes:                  16998
Prefixes being announced from the APNIC address blocks:         15495
APNIC Region origin ASes present in the Internet Routing Table:  1409
APNIC Region origin ASes announcing only one prefix:              460
APNIC Region transit ASes present in the Internet Routing Table:  238
Average APNIC Region AS path length visible:                      5.2
    Max APNIC Region AS path length visible:                       19
Number of APNIC addresses announced to Internet:             89014362
    Equivalent to 5 /8s, 78 /16s and 64 /24s
    Percentage of available APNIC address space announced:       75.1

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

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

Prefixes being announced by ARIN Region ASes:                   72736
Prefixes being announced from the ARIN address blocks:          52030
ARIN Region origin ASes present in the Internet Routing Table:   7198
ARIN Region origin ASes announcing only one prefix:              2202
ARIN Region transit ASes present in the Internet Routing Table:   726
Average ARIN Region AS path length visible:                       5.2
    Max ARIN Region AS path length visible:                        16
Number of ARIN addresses announced to Internet:             219486431
    Equivalent to 13 /8s, 21 /16s and 24 /24s
    Percentage of available ARIN address space announced:        81.8

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, 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:                   17842
Prefixes being announced from the RIPE address blocks:          14473
RIPE Region origin ASes present in the Internet Routing Table:   3467
RIPE Region origin ASes announcing only one prefix:              1857
RIPE Region transit ASes present in the Internet Routing Table:   610
Average RIPE Region AS path length visible:                       5.9
    Max RIPE Region AS path length visible:                        15
Number of RIPE addresses announced to Internet:             110308732
    Equivalent to 6 /8s, 147 /16s and 45 /24s
    Percentage of available RIPE address space announced:        73.1

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
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  Description
 1221     1535       1305       Telstra Pty Ltd
 2764      406        357       connect.com.au pty ltd
  703      385        344       UUNET Technologies, Inc. 
 2907      371       1848       SINET Japan
 4755      351        169       Videsh Sanchar Nigam Ltd. Aut
 7474      301        275       Optus Communications Pty Ltd
 4134      255       1924       Data Communications Bureau
 4766      185       1431       Korea Internet Exchange for "
 4740      179         41       OzEmail ISP
 9443      172         54       Primus Telecommunications
 1659      165       1157       Taiwan Academic Network (TANe
 2521      165        172       PSINet Japan
17557      153         12       Pakistan Telecom
 4812      143        308       China Telecom (Group) - Shang
 7539      142        120       TANet2, sponsored by NSC, TAI
 9583      141         47       Satyam Infoway Ltd.,
 4786      137         16       NetConnect Communications Pty
 9768      127        362       Korea Telecom
17676      125       1952       XTAGE CORPORATION
 7657      122         23       The Internet Group Limited

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

  ASN   No of nets  /20 equiv  Description
  702     1134       2641       UUNET Technologies, Inc. 
 3301      419        948       TeliaNet Sweden
 1257      268        500       SWIPnet Swedish IP Network
 3215      236        543       France Telecom / &Equant
  680      231       2148       DFN-IP service G-WiN
 5515      199        704       Sonera Finland Autonomous Sys
 3320      194       1959       Deutsche Telekom AG
  786      184       1890       The JANET IP Service
 8708      170         17       Romania Data Systems S.A.
  719      166        292       LANLINK autonomous system
 5400      138         62       Concert European Core Network
 2856      135        778       BTnet UK Regional network
 3303      131        561       Swisscom Ltd
 5549      122         82       Nextra Deutschland GmbH + Co.
  517      112        248       KPNQwest Germany GmbH
12302      108          7       MobiFon S.A.
 1273      107        165       Cable & Wireless ECRC GmbH
 3269      107        809       TELECOM ITALIA
 1290      100        398       PSINet UK Ltd.
 8297       93         31       Teleglobe Autonomous System i

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

  ASN   No of nets  /20 equiv  Description
  701     2238       9179       UUNET Technologies, Inc. 
 7018     1088       7347       AT&T 
 3967     1040        482       Exodus Communication 
    1      832       8548       BBN Planet 
 7046      732        919       UUNET Technologies, Inc. 
 1239      722       3387       Sprint 
 8010      719        106       PublicNet Communications, Inc
 4323      613        478       Time Warner Communications, I
  209      597       2217       Qwest 
 3908      578       1378       Supernet, Inc. 
  852      540        697       Telus Advanced Communications
  690      498         71       Merit Network 
 2914      480       2284       Verio, Inc. 
 2149      465        269       Performance Systems, Inc. 
  705      437        251       UUNET Technologies, Inc. 
 3549      397        889       Global Crossing 
 3561      388       2288       Cable & Wireless USA 
 7132      385        532       Southwestern Bell Internet Se
 4151      368       1255       USDA 
  577      350        625       Bell Advanced Communications 

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

  ASN   No of nets  /20 equiv  Description
  701     2238       9179       UUNET Technologies, Inc. 
 1221     1535       1305       Telstra Pty Ltd
  702     1134       2641       UUNET Technologies, Inc. 
 7018     1088       7347       AT&T 
 3967     1040        482       Exodus Communication 
    1      832       8548       BBN Planet 
 7046      732        919       UUNET Technologies, Inc. 
 1239      722       3387       Sprint 
 8010      719        106       PublicNet Communications, Inc
 4323      613        478       Time Warner Communications, I
  209      597       2217       Qwest 
 3908      578       1378       Supernet, Inc. 
  852      540        697       Telus Advanced Communications
  690      498         71       Merit Network 
 2914      480       2284       Verio, Inc. 
 2149      465        269       Performance Systems, Inc. 
  705      437        251       UUNET Technologies, Inc. 
 3301      419        948       TeliaNet Sweden
 2764      406        357       connect.com.au pty ltd
 3549      397        889       Global Crossing 

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

Bad AS  Designation  Network              Transit AS  Description
 2027   UNALLOCATED   150.185.128.0/18      8143       Publicom Corp. 
65025   PRIVATE       168.95.70.0/24        3462       Data Communication B
65025   PRIVATE       168.95.71.0/24        3462       Data Communication B
65025   PRIVATE       168.95.86.32/27       3462       Data Communication B
65026   PRIVATE       168.95.86.128/27      3462       Data Communication B
65026   PRIVATE       168.95.160.0/24       3462       Data Communication B
65026   PRIVATE       168.95.161.0/24       3462       Data Communication B
 5757   UNALLOCATED   207.19.224.0/24        701       UUNET Technologies, 
17940   UNALLOCATED   218.45.0.0/20         4713       NTT Communications C

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

Network            Origin AS  Description
39.0.0.0/8            4554     Exchange Point Blocks 
100.0.0.0/24         10061     Financial Supervisory Service
132.0.0.0/10           568     DISO-UNRRA 
134.137.0.0/16         400     Headquarters Standard Systems
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. 
153.34.0.0/15          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        /8:18       /9:5       /10:7       /11:12      /12:36      
/13:87      /14:221     /15:388     /16:7053    /17:1344    /18:2419    
/19:7078    /20:6031    /21:4706    /22:7102    /23:8867    /24:60670   
/25:331     /26:319     /27:259     /28:233     /29:154     /30:182     
/31:0       /32:60      

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

  ASN   No of nets  Total ann.   Description
  701     1429          2238      UUNET Technologies, Inc. 
 1221     1391          1535      Telstra Pty Ltd
 3967      858          1040      Exodus Communication 
  702      775          1134      UUNET Technologies, Inc. 
 8010      703           719      PublicNet Communications, Inc
 7046      565           732      UUNET Technologies, Inc. 
 7018      558          1088      AT&T 
 4323      524           613      Time Warner Communications, I
  690      495           498      Merit Network 
  209      426           597      Qwest 
 3908      405           578      Supernet, Inc. 
 1239      401           722      Sprint 
    1      398           832      BBN Planet 
 2764      363           406      connect.com.au pty ltd
  852      360           540      Telus Advanced Communications
 2149      352           465      Performance Systems, Inc. 
  705      344           437      UUNET Technologies, Inc. 
 4151      323           368      USDA 
  703      314           385      UUNET Technologies, Inc. 
 4755      304           351      Videsh Sanchar Nigam Ltd. Aut

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

   9:1        12:421      13:10       15:1        17:5        20:1      
  24:833      25:1        26:1        32:72       38:13       40:1      
  43:1        44:2        47:2        52:1        53:2        57:12     
  61:121      62:155      63:1888     64:1467     65:923      66:730    
  67:7        80:96      100:1       128:61      129:111     130:23     
 131:40      132:12      133:2       134:131     135:10      136:103    
 137:98      138:61      139:30      140:89      141:58      142:67     
 143:43      144:57      145:12      146:209     147:90      148:187    
 149:88      150:42      151:191     152:386     153:86      154:8      
 155:84      156:90      157:107     158:69      159:71      160:46     
 161:50      162:82      163:129     164:122     165:99      166:204    
 167:160     168:118     169:45      170:291     171:2       192:5341   
 193:2041    194:2078    195:840     196:444     198:3747    199:3383   
 200:2394    201:1       202:2881    203:4590    204:3314    205:2125   
 206:2626    207:2665    208:2753    209:2985    210:583     211:145    
 212:941     213:534     214:9       215:15      216:2965    217:432    
 218:6      

End of report



More information about the Rtma mailing list