[NANOG] Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Apr 25 13:06:57 CDT 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 26 Apr, 2008

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

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

BGP routing table entries examined:                              254062
    Prefixes after maximum aggregation:                          126996
    Deaggregation factor:                                          2.00
    Unique aggregates announced to Internet:                     123674
Total ASes present in the Internet Routing Table:                 28040
    Prefixes per ASN:                                              9.06
Origin-only ASes present in the Internet Routing Table:           24422
Origin ASes announcing only one prefix:                           11383
Transit ASes present in the Internet Routing Table:                3618
Transit-only ASes present in the Internet Routing Table:             81
Average AS path length visible in the Internet Routing Table:       3.6
    Max AS path length visible:                                      19
    Max AS path prepend of ASN (39375)                               13
Prefixes from unregistered ASNs in the Routing Table:             25254
    Unregistered ASNs in the Routing Table:                        1883
Number of 32-bit ASNs allocated by the RIRs:                         46
Prefixes from 32-bit ASNs in the Routing Table:                      10
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            794
Number of addresses announced to Internet:                   1864785952
    Equivalent to 111 /8s, 38 /16s and 96 /24s
    Percentage of available address space announced:               50.3
    Percentage of allocated address space announced:               61.8
    Percentage of available address space allocated:               81.4
    Percentage of address space in use by end-sites:               71.6
Total number of prefixes smaller than registry allocations:      121945

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

Prefixes being announced by APNIC Region ASes:                    42902
    Total APNIC prefixes after maximum aggregation:               13600
    APNIC Deaggregation factor:                                    3.15
Prefixes being announced from the APNIC address blocks:           55266
    Unique aggregates announced from the APNIC address blocks:    23976
APNIC Region origin ASes present in the Internet Routing Table:    1927
    APNIC Prefixes per ASN:                                       28.68
APNIC Region origin ASes announcing only one prefix:                550
APNIC Region transit ASes present in the Internet Routing Table:    353
Average APNIC Region AS path length visible:                        3.6
    Max APNIC Region AS path length visible:                         14
Number of APNIC addresses announced to Internet:              346601824
    Equivalent to 20 /8s, 168 /16s and 185 /24s
    Percentage of available APNIC address space announced:         79.5

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:                    107608
    Total ARIN prefixes after maximum aggregation:                59199
    ARIN Deaggregation factor:                                     1.82
Prefixes being announced from the ARIN address blocks:            86454
    Unique aggregates announced from the ARIN address blocks:     34200
ARIN Region origin ASes present in the Internet Routing Table:    11763
    ARIN Prefixes per ASN:                                         7.35
ARIN Region origin ASes announcing only one prefix:                4592
ARIN Region transit ASes present in the Internet Routing Table:    1045
Average ARIN Region AS path length visible:                         3.4
    Max ARIN Region AS path length visible:                          16
Number of ARIN addresses announced to Internet:               358940416
    Equivalent to 21 /8s, 100 /16s and 255 /24s
    Percentage of available ARIN address space announced:          73.8

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, 46080-47103
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:                     54765
    Total RIPE prefixes after maximum aggregation:                33522
    RIPE Deaggregation factor:                                     1.63
Prefixes being announced from the RIPE address blocks:            49997
    Unique aggregates announced from the RIPE address blocks:     33450
RIPE Region origin ASes present in the Internet Routing Table:    11258
    RIPE Prefixes per ASN:                                         4.44
RIPE Region origin ASes announcing only one prefix:                5885
RIPE Region transit ASes present in the Internet Routing Table:    1723
Average RIPE Region AS path length visible:                         4.0
    Max RIPE Region AS path length visible:                          18
Number of RIPE addresses announced to Internet:               355108864
    Equivalent to 21 /8s, 42 /16s and 136 /24s
    Percentage of available RIPE address space announced:          81.4

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, 47104 - 48127
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:                   19746
    Total LACNIC prefixes after maximum aggregation:               4938
    LACNIC Deaggregation factor:                                   4.00
Prefixes being announced from the LACNIC address blocks:          18144
    Unique aggregates announced from the LACNIC address blocks:    9833
LACNIC Region origin ASes present in the Internet Routing Table:    894
    LACNIC Prefixes per ASN:                                      20.30
LACNIC Region origin ASes announcing only one prefix:               277
LACNIC Region transit ASes present in the Internet Routing Table:   155
Average LACNIC Region AS path length visible:                       4.0
    Max LACNIC Region AS path length visible:                        19
Number of LACNIC addresses announced to Internet:              50827008
    Equivalent to 3 /8s, 7 /16s and 143 /24s
    Percentage of available LACNIC address space announced:        50.5

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:                   3786
    Total AfriNIC prefixes after maximum aggregation:              1198
    AfriNIC Deaggregation factor:                                  3.16
Prefixes being announced from the AfriNIC address blocks:          4141
    Unique aggregates announced from the AfriNIC address blocks:   1840
AfriNIC Region origin ASes present in the Internet Routing Table:   241
    AfriNIC Prefixes per ASN:                                     17.18
AfriNIC Region origin ASes announcing only one prefix:               79
AfriNIC Region transit ASes present in the Internet Routing Table:   46
Average AfriNIC Region AS path length visible:                      3.7
    Max AfriNIC Region AS path length visible:                       15
Number of AfriNIC addresses announced to Internet:             11360256
    Equivalent to 0 /8s, 173 /16s and 88 /24s
    Percentage of available AfriNIC address space announced:       33.9

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     1634        387          89   Videsh Sanchar Nigam Ltd. Aut
 9498     1162        550          61   BHARTI BT INTERNET LTD.
 9583     1161        129         195   Sify Limited
17488     1059         70          77   Hathway IP Over Cable Interne
 4134      856      12647         320   CHINANET-BACKBONE
 4766      849       6006         345   Korea Telecom (KIX)
18101      680        149          54   Reliance Infocom Ltd Internet
 9829      598        450          12   BSNL National Internet Backbo
 1221      545       1919         419   Telstra Pty Ltd
 4808      519        837         132   CNCGROUP IP network: China169

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
 4323     1423       1029         375   Time Warner Telecom
 7018     1407       5977        1003   AT&T WorldNet Services
 2386     1398        642         864   AT&T Data Communications Serv
11492     1214        146          37   Cable One 
 7011     1097        319         624   Citizens Utilities 
18566     1043        296          10   Covad Communications 
 1785     1011        511         106   AppliedTheory Corporation 
 6197      988        598         508   BellSouth Network Solutions, 
  174      969       6835         802   Cogent Communications
22773      934       2394          62   Cox Communications, Inc.

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      408       1787         368   TDC Tele Danmark
 9198      381         74           9   Kazakhtelecom Data Network Ad
 8452      356        188           7   TEDATA
 3301      338       1459         307   TeliaNet Sweden
 3320      323       7044         266   Deutsche Telekom AG
 8866      297         78          24   Bulgarian Telecommunication C
 5462      292        666          26   Telewest Broadband
 8551      282        269          37   Bezeq International
 3215      278       2679          89   France Telecom Transpac
 6746      267        128         244   Dynamic Network Technologies,

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     1189       2432         222   UniNet S.A. de C.V. 
11830      573        299           9   Instituto Costarricense de El
22047      562        270          14   VTR PUNTO NET S.A. 
 7303      455        222          60   Telecom Argentina Stet-France
16814      426         27          10   NSS, S.A. 
 6471      414         85          46   ENTEL CHILE S.A. 
11172      414        117          69   Servicios Alestra S.A de C.V 
10620      386         98          77   TVCABLE BOGOTA 
14117      384         25          15   Telefonica del Sur S.A. 
20299      308         36          31   NEWCOM AMERICAS 

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      464         61          27   LINKdotNET AS number
 3741      289        853         223   The Internet Solution 
20858      217         34           3   EgyNet
 2018      178        190          86   Tertiary Education Network 
 5713      150        558         120   Telkom SA Ltd 
 6713      143        135          11   Itissalat Al-MAGHRIB
33783      134         10          12   EEPAD TISP TELECOM & INTERNET
 5536      121          8          16   Internet Egypt Network
29571      116         13           8   Ci Telecom Autonomous system 
33776       99          6           7   Starcomms Nigeria Limited

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     2768       3020         115   bellsouth.net, inc. 
23577     1638         34         700   Korea Telecom (ATM-MPLS)
 4755     1634        387          89   Videsh Sanchar Nigam Ltd. Aut
 4323     1423       1029         375   Time Warner Telecom
 7018     1407       5977        1003   AT&T WorldNet Services
 2386     1398        642         864   AT&T Data Communications Serv
11492     1214        146          37   Cable One 
 8151     1189       2432         222   UniNet S.A. de C.V. 
 9498     1162        550          61   BHARTI BT INTERNET LTD.
 9583     1161        129         195   Sify Limited

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

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

  ASN   No of nets  Net Savings Description
 4755      1634        1545      Videsh Sanchar Nigam Ltd. Aut
11492      1214        1177      Cable One 
 9498      1162        1101      BHARTI BT INTERNET LTD.
 4323      1423        1048      Time Warner Telecom
18566      1043        1033      Covad Communications 
17488      1059         982      Hathway IP Over Cable Interne
 8151      1189         967      UniNet S.A. de C.V. 
 9583      1161         966      Sify Limited
17676      1016         951      Softbank BB Corp.
23577      1638         938      Korea Telecom (ATM-MPLS)

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 
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          701       UUNET Technologies, 
22492   UNALLOCATED   12.2.46.0/24          1239       Sprint 
15132   UNALLOCATED   12.9.150.0/24         7018       AT&T WorldNet Servic
32567   UNALLOCATED   12.14.170.0/24        7018       AT&T WorldNet Servic
13632   UNALLOCATED   12.20.55.0/24         6517       Yipes Communications

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      /11:42      /12:140     
/13:280     /14:506     /15:999     /16:9868    /17:4359    /18:7294    
/19:15348   /20:17778   /21:17144   /22:21534   /23:22624   /24:133802  
/25:772     /26:919     /27:495     /28:96      /29:9       /30:1       
/31:0       /32:8       

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

  ASN   No of nets  Total ann.   Description
11492     1200          1214      Cable One 
 2386     1096          1398      AT&T Data Communications Serv
18566     1024          1043      Covad Communications 
 9583      999          1161      Sify Limited
 7011      980          1097      Citizens Utilities 
 4755      972          1634      Videsh Sanchar Nigam Ltd. Aut
 6478      924           925      AT&T Worldnet Services 
17488      871          1059      Hathway IP Over Cable Interne
 6389      863          2768      bellsouth.net, inc. 
 9498      835          1162      BHARTI BT INTERNET LTD.

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

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

   4:9         8:106      12:2015     13:1        15:20       16:3      
  17:6        18:13       20:35       24:1062     25:1        32:61     
  33:4        38:415      40:94       41:657      44:2        47:8      
  52:3        55:3        56:3        57:22       58:512      59:455    
  60:440      61:982      62:1085     63:1959     64:3379     65:2401   
  66:3624     67:1144     68:672      69:2156     70:602      71:126    
  72:1677     73:6        74:952      75:226      76:289      77:646    
  78:609      79:146      80:898      81:853      82:605      83:373    
  84:554      85:1004     86:405      87:645      88:344      89:1273   
  90:11       91:1205     92:285      93:329      96:25       97:14     
  98:142      99:3       116:620     117:303     118:125     119:403    
 120:13      121:526     122:744     123:316     124:839     125:1115   
 128:320     129:198     130:128     131:401     132:65      133:9      
 134:179     135:32      136:222     137:113     138:150     139:60     
 140:490     141:96      142:437     143:284     144:346     145:50     
 146:360     147:142     148:502     149:180     150:128     151:175    
 152:142     153:127     154:10      155:265     156:208     157:263    
 158:168     159:224     160:254     161:111     162:210     163:196    
 164:577     165:444     166:298     167:316     168:611     169:127    
 170:427     171:28      172:2       189:164     190:1808    192:5770   
 193:4099    194:3260    195:2416    196:1061    198:3746    199:3235   
 200:5622    201:1406    202:7558    203:7804    204:4003    205:2089   
 206:2391    207:2754    208:3271    209:3469    210:2537    211:1046   
 212:1362    213:1647    214:447     215:50      216:4325    217:1220   
 218:351     219:407     220:1076    221:424     222:306    

End of report




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