Weekly Routing Table Report

Routing Table Analysis cscora at apnic.net
Fri Jul 22 18:06:30 UTC 2005


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

If you have any comments please contact Philip Smith <pfs at cisco.com>.

Routing Table Report   04:00 +10GMT Sat 23 Jul, 2005

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

BGP routing table entries examined:                              167176
    Prefixes after maximum aggregation:                           96433
    Unique aggregates announced to Internet:                      80898
Total ASes present in the Internet Routing Table:                 20129
Origin-only ASes present in the Internet Routing Table:           17543
Origin ASes announcing only one prefix:                            8262
Transit ASes present in the Internet Routing Table:                2586
Transit-only ASes present in the Internet Routing Table:             76
Average AS path length visible in the Internet Routing Table:       4.5
    Max AS path length visible:                                      26
Prefixes from unregistered ASNs in the Routing Table:                16
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:             15
Number of addresses announced to Internet:                   1397595349
    Equivalent to 83 /8s, 77 /16s and 156 /24s
    Percentage of available address space announced:               37.7
    Percentage of allocated address space announced:               56.8
    Percentage of available address space allocated:               66.4
Total number of prefixes smaller than registry allocations:       79319

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

Prefixes being announced by APNIC Region ASes:                    34695
    Total APNIC prefixes after maximum aggregation:               15921
Prefixes being announced from the APNIC address blocks:           32554
    Unique aggregates announced from the APNIC address blocks:    16320
APNIC Region origin ASes present in the Internet Routing Table:    2312
APNIC Region origin ASes announcing only one prefix:                677
APNIC Region transit ASes present in the Internet Routing Table:    347
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         18
Number of APNIC addresses announced to Internet:              191353472
    Equivalent to 11 /8s, 103 /16s and 210 /24s
    Percentage of available APNIC address space announced:         71.0

APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911
APNIC Address Blocks   58/7, 60/7, 124/7, 126/8, 202/7, 210/7, 218/7,
                       220/7 and 222/8

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

Prefixes being announced by ARIN Region ASes:                     89540
    Total ARIN prefixes after maximum aggregation:                54579
Prefixes being announced from the ARIN address blocks:            70010
    Unique aggregates announced from the ARIN address blocks:     25844
ARIN Region origin ASes present in the Internet Routing Table:    10090
ARIN Region origin ASes announcing only one prefix:                3721
ARIN Region transit ASes present in the Internet Routing Table:     943
Average ARIN Region AS path length visible:                         4.3
    Max ARIN Region AS path length visible:                          20
Number of ARIN addresses announced to Internet:               254705941
    Equivalent to 15 /8s, 46 /16s and 129 /24s
    Percentage of available ARIN address space announced:          63.3

ARIN AS Blocks         1-1876, 1902-2042, 2044-2046, 2048-2106
(pre-ERX allocations)  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, 25600-26591,
                       26624-27647, 29696-30719, 31744-33791
                       35840-36863
ARIN Address Blocks    24/8, 63/8, 64/6, 68/7, 70/6, 74/7, 76/8,
                       198/7, 204/6, 208/7 and 216/8

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

Prefixes being announced by RIPE Region ASes:                     32158
    Total RIPE prefixes after maximum aggregation:                21998
Prefixes being announced from the RIPE address blocks:            29193
    Unique aggregates announced from the RIPE address blocks:     19630
RIPE Region origin ASes present in the Internet Routing Table:     6899
RIPE Region origin ASes announcing only one prefix:                3635
RIPE Region transit ASes present in the Internet Routing Table:    1132
Average RIPE Region AS path length visible:                         5.2
    Max RIPE Region AS path length visible:                          26
Number of RIPE addresses announced to Internet:               212296768
    Equivalent to 12 /8s, 167 /16s and 100 /24s
    Percentage of available RIPE address space announced:          63.3

RIPE AS Blocks         1877-1901, 2043, 2047, 2107-2136, 2585-2614
(pre-ERX allocations)  2773-2822, 2830-2879, 3154-3353, 5377-5631
                       6656-6911, 8192-9215, 12288-13311, 15360-16383
                       20480-21503, 24576-25599, 28672-29695
                       30720-31743, 33792-35839
RIPE Address Blocks    62/8, 80/5, 88/6, 188/8, 193/8, 194/7, 212/7
                       and 217/8

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes:                    9105
    Total LACNIC prefixes after maximum aggregation:               3154
Prefixes being announced from the LACNIC address blocks:           7468
    Unique aggregates announced from the LACNIC address blocks:    4354
LACNIC Region origin ASes present in the Internet Routing Table:    626
LACNIC Region origin ASes announcing only one prefix:               193
LACNIC Region transit ASes present in the Internet Routing Table:   116
Average LACNIC Region AS path length visible:                       5.2
    Max LACNIC Region AS path length visible:                        23
Number of LACNIC addresses announced to Internet:              20573696
    Equivalent to 1 /8s, 57 /16s and 238 /24s
    Percentage of available LACNIC address space announced:        30.7

LACNIC AS Blocks       26592-26623, 27648-28671, plus ERX transfers
LACNIC Address Blocks  189/8, 190/8, 200/7

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes:                   1656
    Total AfriNIC prefixes after maximum aggregation:               781
Prefixes being announced from the AfriNIC address blocks:          1013
    Unique aggregates announced from the AfriNIC address blocks:    778
AfriNIC Region origin ASes present in the Internet Routing Table:   131
AfriNIC Region origin ASes announcing only one prefix:               36
AfriNIC Region transit ASes present in the Internet Routing Table:   16
Average AfriNIC Region AS path length visible:                      4.6
    Max AfriNIC Region AS path length visible:                       12
Number of AfriNIC addresses announced to Internet:              2340096
    Equivalent to 0 /8s, 35 /16s and 181 /24s
    Percentage of available AfriNIC address space announced:        7.0

AfriNIC AS Blocks      36864-37887 & ERX transfers
AfriNIC Address Blocks 41/8, 196/8

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
 4134      961       5568         195   CHINANET-BACKBONE
 9583      768         77          14   Sify Limited
 1221      757       1455         533   Telstra Pty Ltd
 4755      666        248         146   Videsh Sanchar Nigam Ltd. Aut
 4766      590       3412         278   Korea Telecom (KIX)
 7545      513        106          74   TPG Internet Pty Ltd
17676      463       6707          98   Softbank BB Corp.
 9443      382         82          77   Primus Telecommunications
 9929      364        224          46   China Netcom Corp.
 2907      343       1806         318   SINET Japan
 9498      332         83          61   BHARTI BT INTERNET LTD.
 7474      313        272         216   SingTel Optus Pty Ltd
17557      306         23         155   Pakistan Telecom
 4802      290         50         167   Wantree Development
 4808      286        244         168   CNCGROUP IP network: China169
 9837      279         80         183   Powertel Ltd
18302      279        109         154   SK Global co., Ltd
17974      270         65          14   PT TELEKOMUNIKASI INDONESIA
17488      266         16           8   Hathway IP Over Cable Interne
  703      252        261         207   UUNET - Commercial IP service

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
 7018     1494       6417         969   AT&T WorldNet Services
 4323     1139        672         224   Time Warner Telecom
  174     1135       5824        1054   Cogent Communications
  721     1080      21779         310   DLA Systems Automation Center
  701     1022       8168         864   UUNET Technologies, Inc. 
 6197      939        522         433   BellSouth Network Solutions, 
 2386      888        528         655   AT&T Data Communications Serv
 1239      886       2891         637   Sprint 
18566      832        224           7   Covad Communications 
20115      652        499         321   Charter Communications 
  209      623       3471         490   Qwest 
 3356      566      10780         434   Level 3 Communications, LLC 
27364      554         44          18   Armstrong Cable Services 
 3602      543        123         104   Sprint Canada, Inc. 
 3561      538       2385         422   Savvis
  852      535       1093         387   Telus Advanced Communications
 7725      509         64          17   MediaOne 
22773      503       1188          23   Cox Communications, Inc.
 5668      494        114          22   CenturyTel Internet Holdings,
 6198      467        396         224   BellSouth Network Solutions, 

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
  702      592       1995         483   UUNET - Commercial IP service
 3301      300       1081         286   TeliaNet Sweden
 3320      291       3232         240   Deutsche Telekom AG
 8220      266        473         262   COLT Telecommunications
  680      245       2041         241   DFN-IP service G-WiN
 3246      230        469         223   Song Networks
 8708      224        253         210   Romania Data Systems S.A.
 1257      194        712         172   SWIPnet Swedish IP Network
 5515      181        778         127   Sonera Solution Autonomous Sy
  786      175       1794         175   The JANET IP Service
 5400      173        286         146   BT Ignite European Backbone
 6746      173         49         151   Dynamic Network Technologies,
 3269      169       1520          72   TELECOM ITALIA
  719      168        340         100   LANLINK autonomous system
 8866      163         21          11   Bulgarian Telecommunication C
 3300      154        184          87   AUCS Communications Services 
 9121      150        272          36   TTnet Autonomous System
 6830      149        537          31   UPC Distribution Services
25186      141        145          98   France Telecom Transpac's Tra
 1273      137        175          96   Cable & Wireless Deutschland 

LACNIC Region per AS prefix count summary
-----------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 8151      380        599         158   UniNet S.A. de C.V. 
16814      265         16           7   NSS, S.A. 
11172      232         99          59   Servicios Alestra S.A de C.V 
 6147      192        110          21   Telefonica Del Peru 
11664      181         20          23   Keytech SA 
14117      152          9           5   Telefonica del Sur S.A. 
 7303      150         69          18   Telecom Argentina Stet-France
22047      143        112           7   VTR PUNTO NET S.A. 
19632      142         14           5   Metropolis Intercom S.A. 
11556      131         64           3   Cable-Wireless Panama 
 6505      130         90          87   Global One Communicaoes Ltda 
19169      115          7          22   Telconet 
 6503      114        147          74   AVANTEL, S.A. 
13999      110         52           9   Mega Cable S.A. de C.V. 
18822      110          7          14   TELEFONICA MANQUEHUE 
10481      101         40           7   Prima S.A. 
23216       98         24          23   RAMtelecom Telecomunicaciones
22927       97         81          26   TELEFONICA DE ARGENTINA 
 5639       96         12           9   Telecommunications Services o
21826       95         13          20   INTERCABLE 

AfriNIC Region per AS prefix count summary
------------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 3741      263        621         221   The Internet Solution 
 5536      120         15          17   Internet Egypt Network
 2018       97        295          88   Tertiary Education Network 
 8452       93         28           6   TEDATA
 2905       76        266          68   The Internetworking Company o
24835       57         34           6   RAYA Telecom - Egypt
20928       56         16           2   Noor Advanced Technologies AS
 6713       51         54           8   Itissalat Al-MAGHRIB
15475       50         84           4   Nile Online
 9129       43          3           3   UUNET Kenya
12455       38          6           3   Jambonet Autonomous system
 5713       36        142          29   Telkom SA Ltd 
15706       31          8           3   Sudatel Internet Exchange Aut
 8524       23          1           4   AUCEGYPT Autonomous System
16637       22         10          19   Johnnic e-Ventures 
23889       20          5           9   MAURITIUS TELECOM
25364       20          1           3   Egypt Cyber Cenyer Network
10798       19          1          11   Standard Bank of South Africa
21491       18          1           1   UTL On-line is RF broadband I
12258       17          3          11   Vodacom Internet Company 

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

  ASN   No of nets  Net Savings Description
 4323      1139         915      Time Warner Telecom
18566       832         825      Covad Communications 
  721      1080         770      DLA Systems Automation Center
 4134       961         766      CHINANET-BACKBONE
 9583       768         754      Sify Limited
27364       554         536      Armstrong Cable Services 
 4755       666         520      Videsh Sanchar Nigam Ltd. Aut
 6197       939         506      BellSouth Network Solutions, 
 7725       509         492      MediaOne 
22773       503         480      Cox Communications, Inc.
 5668       494         472      CenturyTel Internet Holdings,
 3602       543         439      Sprint Canada, Inc. 
 7545       513         439      TPG Internet Pty Ltd
17676       463         365      Softbank BB Corp.
 6467       379         345      E.Spire Communications, Inc. 
20115       652         331      Charter Communications 
19262       433         319      Verizon Global Networks 
 9929       364         318      China Netcom Corp.
 4766       590         312      Korea Telecom (KIX)
 9443       382         305      Primus Telecommunications

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

Bad AS  Designation  Network              Transit AS  Description
65050   PRIVATE       168.96.148.0/24       6140       ImpSat
65507   PRIVATE       200.0.64.0/24        27750       Cooperación Latino A
65004   PRIVATE       200.0.113.0/24       28477       Universidad Autonoma
65004   PRIVATE       200.4.0.0/24         28477       Universidad Autonoma
65004   PRIVATE       200.4.1.0/24         28477       Universidad Autonoma
65004   PRIVATE       200.4.2.0/24         28477       Universidad Autonoma
65004   PRIVATE       200.4.3.0/24         28477       Universidad Autonoma
65004   PRIVATE       200.4.4.0/24         28477       Universidad Autonoma
65004   PRIVATE       200.4.5.0/24         28477       Universidad Autonoma
65004   PRIVATE       200.4.6.0/24         28477       Universidad Autonoma
65142   PRIVATE       200.32.76.0/24        6140       ImpSat
65142   PRIVATE       200.32.77.0/24        6140       ImpSat
64512   PRIVATE       200.61.48.0/20       11664       Keytech SA 
64512   PRIVATE       200.61.58.0/23       11664       Keytech SA 
64512   PRIVATE       200.80.148.0/23      11664       Keytech SA 
65005   PRIVATE       203.200.197.0/24      4755       Videsh Sanchar Nigam

Advertised Unallocated Addresses
--------------------------------

Network            Origin AS  Description
50.160.0.0/13         1221     Telstra Pty Ltd
132.0.0.0/10           721     DLA Systems Automation Center
137.0.0.0/13           721     DLA Systems Automation Center
158.0.0.0/13           721     DLA Systems Automation Center
172.32.0.0/24         7011     Citizens Utilities 
192.43.230.0/24       7575     Australian Academic and Rease
192.44.0.0/24         5501     Fraunhofer Gesellschaft
192.44.0.0/19          702     UUNET - Commercial IP service
192.70.164.0/24      25689     National Research Council of 
192.84.205.0/24        719     LANLINK autonomous system
192.119.135.0/24       270     NASA 
192.135.50.0/24       7018     AT&T WorldNet Services
192.169.0.0/23        3970     RGnet, Inc. 
192.172.0.0/19         721     DLA Systems Automation Center
192.200.100.0/24      7018     AT&T WorldNet Services

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

 /1:0        /2:0        /3:0        /4:0        /5:0        /6:0       
 /7:0        /8:17       /9:3       /10:8       /11:15      /12:75      
/13:167     /14:317     /15:601     /16:8464    /17:2642    /18:4518    
/19:10517   /20:11463   /21:9498    /22:12987   /23:13884   /24:91004   
/25:347     /26:292     /27:171     /28:51      /29:29      /30:73      
/31:0       /32:33      

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

  ASN   No of nets  Total ann.   Description
18566      816           832      Covad Communications 
 6197      765           939      BellSouth Network Solutions, 
 7018      701          1494      AT&T WorldNet Services
 2386      602           888      AT&T Data Communications Serv
 9583      586           768      Sify Limited
27364      545           554      Armstrong Cable Services 
 4323      540          1139      Time Warner Telecom
 7725      479           509      MediaOne 
 4766      408           590      Korea Telecom (KIX)
 5668      402           494      CenturyTel Internet Holdings,
 1239      371           886      Sprint 
  702      365           592      UUNET - Commercial IP service
 6198      342           467      BellSouth Network Solutions, 
 7011      325           376      Citizens Utilities 
19916      305           312      OLM LLC 
15270      296           321      PaeTec.net -a division of Pae
 6517      291           313      Yipes Communications, Inc. 
20115      283           652      Charter Communications 
 9929      276           364      China Netcom Corp.
11456      276           315      Carolina Online, Inc. 

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

   4:6         8:23        9:1        12:1553     13:1        15:9      
  16:2        17:3        18:3        20:4        24:1181     30:2      
  32:69       33:2        38:136      40:54       44:4        47:2      
  52:4        55:2        56:3        57:23       58:137      59:58     
  60:67       61:750      62:638      63:1889     64:2792     65:2067   
  66:2914     67:635      68:556      69:1113     70:147      71:10     
  72:268      80:589      81:594      82:433      83:289      84:225    
  85:287      86:62       87:17      128:157     129:167     130:88     
 131:292     132:38      133:1       134:145     135:42      136:138    
 137:73      138:164     139:61      140:303     141:107     142:152    
 143:138     144:203     145:34      146:290     147:110     148:290    
 149:177     150:107     151:64      152:108     153:88      154:5      
 155:141     156:78      157:99      158:164     159:167     160:78     
 161:70      162:218     163:94      164:193     165:186     166:158    
 167:244     168:439     169:144     170:320     171:8       172:1      
 190:1       192:5704    193:3228    194:2427    195:1593    196:661    
 198:3895    199:3288    200:4062    201:208     202:5914    203:6396   
 204:3801    205:2024    206:2431    207:2802    208:2049    209:3329   
 210:1697    211:805     212:1259    213:1332    214:273     215:31     
 216:3575    217:1122    218:211     219:157     220:392     221:248    
 222:121    

End of report



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