Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Apr 4 18:07:56 UTC 2008


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 historical data, please see http://thyme.apnic.net.

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

Routing Table Report   04:00 +10GMT Sat 05 Apr, 2008

Report Website:     http://thyme.apnic.net
Detailed Analysis:  http://thyme.apnic.net/current/

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

BGP routing table entries examined:                              251663
    Prefixes after maximum aggregation:                          126431
    Deaggregation factor:                                          1.99
    Unique aggregates announced to Internet:                     122544
Total ASes present in the Internet Routing Table:                 27824
    Prefixes per ASN:                                              9.04
Origin-only ASes present in the Internet Routing Table:           24255
Origin ASes announcing only one prefix:                           11268
Transit ASes present in the Internet Routing Table:                3569
Transit-only ASes present in the Internet Routing Table:             80
Average AS path length visible in the Internet Routing Table:       3.6
    Max AS path length visible:                                      18
    Max AS path prepend of ASN (43380)                               13
Prefixes from unregistered ASNs in the Routing Table:             24961
    Unregistered ASNs in the Routing Table:                        1890
Number of 32-bit ASNs allocated by the RIRs:                         47
Prefixes from 32-bit ASNs in the Routing Table:                       8
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            850
Number of addresses announced to Internet:                   1856218272
    Equivalent to 110 /8s, 163 /16s and 164 /24s
    Percentage of available address space announced:               50.1
    Percentage of allocated address space announced:               61.5
    Percentage of available address space allocated:               81.4
    Percentage of address space in use by end-sites:               71.1
Total number of prefixes smaller than registry allocations:      120069

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

Prefixes being announced by APNIC Region ASes:                    42554
    Total APNIC prefixes after maximum aggregation:               13541
    APNIC Deaggregation factor:                                    3.14
Prefixes being announced from the APNIC address blocks:           54788
    Unique aggregates announced from the APNIC address blocks:    23781
APNIC Region origin ASes present in the Internet Routing Table:    1917
    APNIC Prefixes per ASN:                                       28.58
APNIC Region origin ASes announcing only one prefix:                552
APNIC Region transit ASes present in the Internet Routing Table:    351
Average APNIC Region AS path length visible:                        3.7
    Max APNIC Region AS path length visible:                         15
Number of APNIC addresses announced to Internet:              339369312
    Equivalent to 20 /8s, 58 /16s and 93 /24s
    Percentage of available APNIC address space announced:         77.8

APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079
APNIC Address Blocks    58/8,  59/8,  60/8,  61/8, 114/8, 115/8, 116/8,
                       117/8, 118/8, 119/8, 120/8, 121/8, 122/8, 123/8,
                       124/8, 125/8, 126/8, 202/8, 203/8, 210/8, 211/8,
                       218/8, 219/8, 220/8, 221/8, 222/8,

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

Prefixes being announced by ARIN Region ASes:                    107122
    Total ARIN prefixes after maximum aggregation:                58976
    ARIN Deaggregation factor:                                     1.82
Prefixes being announced from the ARIN address blocks:            85863
    Unique aggregates announced from the ARIN address blocks:     34029
ARIN Region origin ASes present in the Internet Routing Table:    11687
    ARIN Prefixes per ASN:                                         7.35
ARIN Region origin ASes announcing only one prefix:                4545
ARIN Region transit ASes present in the Internet Routing Table:    1038
Average ARIN Region AS path length visible:                         3.4
    Max ARIN Region AS path length visible:                          15
Number of ARIN addresses announced to Internet:               361937024
    Equivalent to 21 /8s, 146 /16s and 184 /24s
    Percentage of available ARIN address space announced:          74.4

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, 39936-40959
ARIN Address Blocks     24/8,  63/8,  64/8,  65/8,  66/8,  67/8,  68/8,
                        69/8,  70/8,  71/8,  72/8,  73/8,  74/8,  75/8,
                        76/8,  96/8,  97/8,  98/8,  99/8, 173/8, 174/8,
                       199/8, 204/8, 205/8, 206/8, 207/8, 208/8, 209/8,
                       216/8,

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

Prefixes being announced by RIPE Region ASes:                     53958
    Total RIPE prefixes after maximum aggregation:                33261
    RIPE Deaggregation factor:                                     1.62
Prefixes being announced from the RIPE address blocks:            49136
    Unique aggregates announced from the RIPE address blocks:     32912
RIPE Region origin ASes present in the Internet Routing Table:    11137
    RIPE Prefixes per ASN:                                         4.41
RIPE Region origin ASes announcing only one prefix:                5813
RIPE Region transit ASes present in the Internet Routing Table:    1699
Average RIPE Region AS path length visible:                         4.0
    Max RIPE Region AS path length visible:                          18
Number of RIPE addresses announced to Internet:               351438208
    Equivalent to 20 /8s, 242 /16s and 133 /24s
    Percentage of available RIPE address space announced:          80.6

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, 38912-39935
                       40960-45055
RIPE Address Blocks     62/8,  77/8,  78/8,  79/8,  80/8,  81/8,  82/8,
                        83/8,  84/8,  85/8,  86/8,  87/8,  88/8,  89/8,
                        90/8,  91/8,  92/8,  93/8,  94/8,  95/8, 193/8,
                       194/8, 195/8, 212/8, 213/8, 217/8,

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

Prefixes being announced by LACNIC Region ASes:                   19456
    Total LACNIC prefixes after maximum aggregation:               4866
    LACNIC Deaggregation factor:                                   4.00
Prefixes being announced from the LACNIC address blocks:          17825
    Unique aggregates announced from the LACNIC address blocks:    9667
LACNIC Region origin ASes present in the Internet Routing Table:    885
    LACNIC Prefixes per ASN:                                      20.14
LACNIC Region origin ASes announcing only one prefix:               279
LACNIC Region transit ASes present in the Internet Routing Table:   152
Average LACNIC Region AS path length visible:                       4.0
    Max LACNIC Region AS path length visible:                        16
Number of LACNIC addresses announced to Internet:              50249728
    Equivalent to 2 /8s, 254 /16s and 192 /24s
    Percentage of available LACNIC address space announced:        49.9

LACNIC AS Blocks       26592-26623, 27648-28671, plus ERX transfers
LACNIC Address Blocks  186/8, 187/8, 189/8, 190/8, 200/8, 201/8,

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

Prefixes being announced by AfriNIC Region ASes:                   3611
    Total AfriNIC prefixes after maximum aggregation:              1119
    AfriNIC Deaggregation factor:                                  3.23
Prefixes being announced from the AfriNIC address blocks:          4007
    Unique aggregates announced from the AfriNIC address blocks:   1805
AfriNIC Region origin ASes present in the Internet Routing Table:   234
    AfriNIC Prefixes per ASN:                                     17.12
AfriNIC Region origin ASes announcing only one prefix:               79
AfriNIC Region transit ASes present in the Internet Routing Table:   45
Average AfriNIC Region AS path length visible:                      3.7
    Max AfriNIC Region AS path length visible:                       14
Number of AfriNIC addresses announced to Internet:             10136064
    Equivalent to 0 /8s, 154 /16s and 170 /24s
    Percentage of available AfriNIC address space announced:       30.2

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
 4755     1624        387          88   Videsh Sanchar Nigam Ltd. Aut
 9583     1157        129         191   Sify Limited
 9498     1145        550          61   BHARTI BT INTERNET LTD.
17488     1010         68          84   Hathway IP Over Cable Interne
 4134      858      12663         320   CHINANET-BACKBONE
 4766      851       6005         341   Korea Telecom (KIX)
18101      674        126          53   Reliance Infocom Ltd Internet
 9829      595        450          12   BSNL National Internet Backbo
 4812      562        969          92   China Telecom (Shanghai)
 1221      542       1950         418   Telstra Pty Ltd

Complete listing at http://thyme.apnic.net/current/data-ASnet-APNIC

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
 7018     1438       5945        1020   AT&T WorldNet Services
 4323     1405       1028         368   Time Warner Telecom
 2386     1386        657         848   AT&T Data Communications Serv
11492     1211        145          48   Cable One 
 7011     1085        316         619   Citizens Utilities 
18566     1044        296          10   Covad Communications 
 1785     1001        479         107   AppliedTheory Corporation 
 6197      991        730         478   BellSouth Network Solutions, 
  174      964       6834         807   Cogent Communications
20115      920        872         510   Charter Communications 

Complete listing at http://thyme.apnic.net/current/data-ASnet-ARIN

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
 3292      400       1787         364   TDC Tele Danmark
 8452      359        188           7   TEDATA
 3301      337       1443         306   TeliaNet Sweden
 3320      326       7045         270   Deutsche Telekom AG
 5462      292        666          26   Telewest Broadband
 8866      292         78          24   Bulgarian Telecommunication C
 8551      279        267          42   Bezeq International
 3215      278       2671          91   France Telecom Transpac
 6746      267        127         244   Dynamic Network Technologies,
  680      259       2046         258   DFN-IP service G-WiN

Complete listing at http://thyme.apnic.net/current/data-ASnet-RIPE

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
 8151     1192       2449         221   UniNet S.A. de C.V. 
11830      555        299           9   Instituto Costarricense de El
22047      553        270          14   VTR PUNTO NET S.A. 
 7303      453        220          61   Telecom Argentina Stet-France
16814      426         27          10   NSS, S.A. 
11172      409        117          70   Servicios Alestra S.A de C.V 
 6471      401         85          39   ENTEL CHILE S.A. 
10620      399        104          51   TVCABLE BOGOTA 
14117      350         23          16   Telefonica del Sur S.A. 
10481      310        152          10   Prima S.A. 

Complete listing at http://thyme.apnic.net/current/data-ASnet-LACNIC

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
24863      458         61          27   LINKdotNET AS number
 3741      287        853         223   The Internet Solution 
20858      217         34           3   EgyNet
 2018      200        272         110   Tertiary Education Network 
 6713      143        135          11   Itissalat Al-MAGHRIB
33783      131          9          16   EEPAD TISP TELECOM & INTERNET
 5536      121          8          16   Internet Egypt Network
33776       99          6           7   Starcomms Nigeria Limited
24835       89         48           7   RAYA Telecom - Egypt
 2905       83        176          74   The Internetworking Company o

Complete listing at http://thyme.apnic.net/current/data-ASnet-AFRINIC

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
 6389     2050       3011          98   bellsouth.net, inc. 
23577     1634         34         700   Korea Telecom (ATM-MPLS)
 4755     1624        387          88   Videsh Sanchar Nigam Ltd. Aut
 7018     1438       5945        1020   AT&T WorldNet Services
 4323     1405       1028         368   Time Warner Telecom
 2386     1386        657         848   AT&T Data Communications Serv
11492     1211        145          48   Cable One 
 8151     1192       2449         221   UniNet S.A. de C.V. 
 9583     1157        129         191   Sify Limited
 9498     1145        550          61   BHARTI BT INTERNET LTD.

Complete listing at http://thyme.apnic.net/current/data-ASnet

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

  ASN   No of nets  Net Savings Description
 4755      1624        1536      Videsh Sanchar Nigam Ltd. Aut
11492      1211        1163      Cable One 
 9498      1145        1084      BHARTI BT INTERNET LTD.
 4323      1405        1037      Time Warner Telecom
18566      1044        1034      Covad Communications 
 8151      1192         971      UniNet S.A. de C.V. 
 9583      1157         966      Sify Limited
17676      1018         952      Softbank BB Corp.
23577      1634         934      Korea Telecom (ATM-MPLS)
17488      1010         926      Hathway IP Over Cable Interne

Complete listing at http://thyme.apnic.net/current/data-CIDRnet

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

Bad AS  Designation  Network              Transit AS  Description
14780   UNALLOCATED   4.79.181.0/24        10310       Yahoo! 
12180   UNALLOCATED   4.79.248.0/24         1239       Sprint 
26478   UNALLOCATED   8.7.228.0/24          6461       AboveNet Communicati
12180   UNALLOCATED   8.10.16.0/24          3549       Global Crossing 
12180   UNALLOCATED   8.10.58.0/23          3549       Global Crossing 
14779   UNALLOCATED   8.12.144.0/24        10310       Yahoo! 
16927   UNALLOCATED   12.0.252.0/23         7018       AT&T WorldNet Servic
22492   UNALLOCATED   12.2.46.0/24          1239       Sprint 
15132   UNALLOCATED   12.9.150.0/24          701       UUNET Technologies, 
32567   UNALLOCATED   12.14.170.0/24        7018       AT&T WorldNet Servic

Complete listing at http://thyme.apnic.net/current/data-badAS

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

Network            Origin AS  Description
24.51.159.0/24        7843     Adelphia Corp. 
24.54.224.0/19       20001     HoldCo LLC - Road Runner 
24.75.160.0/19        7843     Adelphia Corp. 
24.75.192.0/18        7843     Adelphia Corp. 
24.142.40.0/21        7018     AT&T WorldNet Services
24.142.160.0/19       7018     AT&T WorldNet Services
24.246.0.0/17         7018     AT&T WorldNet Services
24.246.128.0/18       7018     AT&T WorldNet Services
62.61.220.0/24       24974     Tachyon Europe BV - Wireless 
63.140.213.0/24      22555     Universal Talkware Corporatio

Complete listing at http://thyme.apnic.net/current/data-add-IANA

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

 /1:0        /2:0        /3:0        /4:0        /5:0        /6:0       
 /7:0        /8:19       /9:9       /10:16      /11:41      /12:137     
/13:279     /14:501     /15:1004    /16:9831    /17:4353    /18:7330    
/19:15307   /20:17626   /21:16834   /22:21410   /23:22378   /24:132287  
/25:792     /26:902     /27:481     /28:108     /29:9       /30:1       
/31:0       /32:8       

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

  ASN   No of nets  Total ann.   Description
11492     1197          1211      Cable One 
 2386     1087          1386      AT&T Data Communications Serv
18566     1025          1044      Covad Communications 
 9583      994          1157      Sify Limited
 7011      967          1085      Citizens Utilities 
 4755      964          1624      Videsh Sanchar Nigam Ltd. Aut
 6478      898           899      AT&T Worldnet Services 
17488      823          1010      Hathway IP Over Cable Interne
 9498      817          1145      BHARTI BT INTERNET LTD.
 7018      811          1438      AT&T WorldNet Services

Complete listing at http://thyme.apnic.net/current/data/sXXas-nos

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

   4:9         8:102      12:2000     13:1        15:20       16:3      
  17:6        18:13       20:35       24:1049     25:1        32:60     
  33:4        38:409      40:94       41:633      44:2        47:8      
  52:3        55:3        56:3        57:22       58:517      59:435    
  60:405      61:984      62:1088     63:1957     64:3391     65:2382   
  66:3606     67:1126     68:648      69:2128     70:535      71:127    
  72:1568     73:6        74:921      75:222      76:286      77:625    
  78:544      79:137      80:890      81:826      82:605      83:367    
  84:560      85:946      86:396      87:665      88:317      89:1228   
  90:11       91:1159     92:240      93:234      96:23       97:16     
  98:112      99:3       112:1       116:586     117:282     118:110    
 119:370     121:482     122:731     123:313     124:838     125:1109   
 128:317     129:201     130:125     131:404     132:69      133:9      
 134:188     135:32      136:221     137:119     138:149     139:65     
 140:484     141:110     142:380     143:276     144:344     145:50     
 146:338     147:134     148:499     149:180     150:128     151:172    
 152:142     153:127     154:11      155:267     156:207     157:261    
 158:169     159:223     160:244     161:110     162:209     163:195    
 164:574     165:433     166:298     167:315     168:607     169:131    
 170:426     171:28      172:3       189:169     190:1667    192:5774   
 193:4093    194:3256    195:2377    196:1035    198:3769    199:3236   
 200:5590    201:1383    202:7528    203:7830    204:4012    205:2094   
 206:2404    207:2722    208:3237    209:3483    210:2527    211:1034   
 212:1342    213:1660    214:455     215:48      216:4272    217:1233   
 218:359     219:404     220:1069    221:400     222:313    

End of report



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