Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Jan 28 12:28:38 CST 2011


This is an automated weekly mailing describing the state of the Internet
Routing Table as seen from APNIC's router in Japan.

The posting is sent to APOPS, NANOG, AfNOG, AusNOG, SANOG, PacNOG, LacNOG,
CaribNOG and the RIPE Routing Working Group.

Daily listings are sent to bgp-stats at lists.apnic.net

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

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

Routing Table Report   04:00 +10GMT Sat 29 Jan, 2011

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

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

BGP routing table entries examined:                              340429
    Prefixes after maximum aggregation:                          154694
    Deaggregation factor:                                          2.20
    Unique aggregates announced to Internet:                     169224
Total ASes present in the Internet Routing Table:                 35707
    Prefixes per ASN:                                              9.53
Origin-only ASes present in the Internet Routing Table:           30778
Origin ASes announcing only one prefix:                           14951
Transit ASes present in the Internet Routing Table:                4929
Transit-only ASes present in the Internet Routing Table:            118
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      31
    Max AS path prepend of ASN (36992)                               29
Prefixes from unregistered ASNs in the Routing Table:               321
    Unregistered ASNs in the Routing Table:                         126
Number of 32-bit ASNs allocated by the RIRs:                       1051
Prefixes from 32-bit ASNs in the Routing Table:                       6
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            215
Number of addresses announced to Internet:                   2348554048
    Equivalent to 139 /8s, 252 /16s and 23 /24s
    Percentage of available address space announced:               63.4
    Percentage of allocated address space announced:               65.4
    Percentage of available address space allocated:               96.8
    Percentage of address space in use by end-sites:               88.0
Total number of prefixes smaller than registry allocations:      139482

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

Prefixes being announced by APNIC Region ASes:                    84978
    Total APNIC prefixes after maximum aggregation:               28832
    APNIC Deaggregation factor:                                    2.95
Prefixes being announced from the APNIC address blocks:           81750
    Unique aggregates announced from the APNIC address blocks:    35514
APNIC Region origin ASes present in the Internet Routing Table:    4313
    APNIC Prefixes per ASN:                                       18.95
APNIC Region origin ASes announcing only one prefix:               1219
APNIC Region transit ASes present in the Internet Routing Table:    690
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         20
Number of APNIC addresses announced to Internet:              586409504
    Equivalent to 34 /8s, 243 /16s and 230 /24s
    Percentage of available APNIC address space announced:         79.4

APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079
                       55296-56319, 131072-132095
APNIC Address Blocks     1/8,  14/8,  27/8,  36/8,  42/8,  43/8,  49/8,
                        58/8,  59/8,  60/8,  61/8, 101/8, 110/8, 111/8,
                       112/8, 113/8, 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, 133/8, 175/8, 180/8, 182/8, 183/8, 202/8,
                       203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8,
                       222/8, 223/8,

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

Prefixes being announced by ARIN Region ASes:                    138008
    Total ARIN prefixes after maximum aggregation:                70693
    ARIN Deaggregation factor:                                     1.95
Prefixes being announced from the ARIN address blocks:           108934
    Unique aggregates announced from the ARIN address blocks:     44467
ARIN Region origin ASes present in the Internet Routing Table:    14154
    ARIN Prefixes per ASN:                                         7.70
ARIN Region origin ASes announcing only one prefix:                5405
ARIN Region transit ASes present in the Internet Routing Table:    1470
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          23
Number of ARIN addresses announced to Internet:               751502720
    Equivalent to 44 /8s, 203 /16s and 5 /24s
    Percentage of available ARIN address space announced:          63.1

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
                       53248-55295, 393216-394239
ARIN Address Blocks      3/8,   4/8,   6/8,   7/8,   8/8,   9/8,  11/8,
                        12/8,  13/8,  15/8,  16/8,  17/8,  18/8,  19/8,
                        20/8,  21/8,  22/8,  23/8,  24/8,  26/8,  28/8,
                        29/8,  30/8,  32/8,  33/8,  34/8,  35/8,  38/8,
                        40/8,  44/8,  47/8,  48/8,  50/8,  52/8,  54/8,
                        55/8,  56/8,  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, 100/8,
                       107/8, 108/8, 173/8, 174/8, 184/8, 199/8, 204/8,
                       205/8, 206/8, 207/8, 208/8, 209/8, 214/8, 215/8,
                       216/8,

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

Prefixes being announced by RIPE Region ASes:                     80950
    Total RIPE prefixes after maximum aggregation:                46146
    RIPE Deaggregation factor:                                     1.75
Prefixes being announced from the RIPE address blocks:            74326
    Unique aggregates announced from the RIPE address blocks:     48334
RIPE Region origin ASes present in the Internet Routing Table:    15230
    RIPE Prefixes per ASN:                                         4.88
RIPE Region origin ASes announcing only one prefix:                7770
RIPE Region transit ASes present in the Internet Routing Table:    2370
Average RIPE Region AS path length visible:                         4.6
    Max RIPE Region AS path length visible:                          25
Number of RIPE addresses announced to Internet:               456913728
    Equivalent to 27 /8s, 59 /16s and 243 /24s
    Percentage of available RIPE address space announced:          75.7

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, 47104-52223, 56320-58367
                       196608-198655
RIPE Address Blocks      2/8,   5/8,  25/8,  31/8,  37/8,  46/8,  51/8,
                        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, 109/8,
                       176/8, 178/8, 193/8, 194/8, 195/8, 212/8, 213/8,
                       217/8,

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

Prefixes being announced by LACNIC Region ASes:                   31587
    Total LACNIC prefixes after maximum aggregation:               7249
    LACNIC Deaggregation factor:                                   4.36
Prefixes being announced from the LACNIC address blocks:          30348
    Unique aggregates announced from the LACNIC address blocks:   15794
LACNIC Region origin ASes present in the Internet Routing Table:   1424
    LACNIC Prefixes per ASN:                                      21.31
LACNIC Region origin ASes announcing only one prefix:               431
LACNIC Region transit ASes present in the Internet Routing Table:   250
Average LACNIC Region AS path length visible:                       4.4
    Max LACNIC Region AS path length visible:                        19
Number of LACNIC addresses announced to Internet:              80151168
    Equivalent to 4 /8s, 199 /16s and 2 /24s
    Percentage of available LACNIC address space announced:        59.7

LACNIC AS Blocks       26592-26623, 27648-28671, 52224-53247,
                       262144-263167 plus ERX transfers
LACNIC Address Blocks  177/8, 181/8, 186/8, 187/8, 189/8, 190/8, 200/8,
                       201/8,

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

Prefixes being announced by AfriNIC Region ASes:                   4684
    Total AfriNIC prefixes after maximum aggregation:              1653
    AfriNIC Deaggregation factor:                                  2.83
Prefixes being announced from the AfriNIC address blocks:          3503
    Unique aggregates announced from the AfriNIC address blocks:   1581
AfriNIC Region origin ASes present in the Internet Routing Table:   407
    AfriNIC Prefixes per ASN:                                      8.61
AfriNIC Region origin ASes announcing only one prefix:              126
AfriNIC Region transit ASes present in the Internet Routing Table:   92
Average AfriNIC Region AS path length visible:                      5.1
    Max AfriNIC Region AS path length visible:                       31
Number of AfriNIC addresses announced to Internet:             18336512
    Equivalent to 1 /8s, 23 /16s and 203 /24s
    Percentage of available AfriNIC address space announced:       36.4

AfriNIC AS Blocks      36864-37887, 327680-328703 & ERX transfers
AfriNIC Address Blocks  41/8, 105/8, 197/8,

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
 4766     1915       9485         526   Korea Telecom (KIX)
 7545     1594        301          82   TPG Internet Pty Ltd
 4755     1401        636         159   TATA Communications formerly 
17974     1395        467          27   PT TELEKOMUNIKASI INDONESIA
24560     1094        317         180   Bharti Airtel Ltd., Telemedia
 9583     1044         76         487   Sify Limited
 4808     1028       2108         287   CNCGROUP IP network: China169
17488      950        162         103   Hathway IP Over Cable Interne
18101      924        117         142   Reliance Infocom Ltd Internet
 9829      847        739          75   BSNL National Internet Backbo

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

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
 6389     3710       3855         265   bellsouth.net, inc. 
 4323     2629       1109         404   Time Warner Telecom
19262     1841       4943         285   Verizon Global Networks 
 1785     1787        697         133   PaeTec Communications, Inc.
20115     1519       1529         643   Charter Communications 
 6478     1476        291          56   AT&T Worldnet Services 
 7018     1360       6674         875   AT&T WorldNet Services
 2386     1297        553         933   AT&T Data Communications Serv
22773     1274       2864          77   Cox Communications, Inc.
11492     1266        235          81   Cable One 

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

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
 6830      514       1764         319   UPC Distribution Services
 9198      465        266          14   Kazakhtelecom Data Network Ad
34984      458         97         137   BILISIM TELEKOM
 3292      447       2011         390   TDC Tele Danmark
 8866      438        133          23   Bulgarian Telecommunication C
12479      412        577           6   Uni2 Autonomous System
 3320      403       7619         352   Deutsche Telekom AG
 8551      402        353          46   Bezeq International
  702      396       1816         309   UUNET - Commercial IP service
20940      393         91         303   Akamai Technologies European 

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

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
10620     1358        252         165   TVCABLE BOGOTA 
 8151     1329       2627         355   UniNet S.A. de C.V. 
28573     1245        959          82   NET Servicos de Comunicao S.A
 6503     1149        355          78   AVANTEL, S.A. 
 7303      885        461         114   Telecom Argentina Stet-France
14420      614         55          90   CORPORACION NACIONAL DE TELEC
22047      566        310          15   VTR PUNTO NET S.A. 
 3816      526        222          99   Empresa Nacional de Telecomun
 7738      478        922          30   Telecomunicacoes da Bahia S.A
14117      456         34          31   Telefonica del Sur S.A. 

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

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
 3741      264        987         226   The Internet Solution 
 6713      203        199          12   Itissalat Al-MAGHRIB
33776      194         12          15   Starcomms Nigeria Limited
29571      193         17          11   Ci Telecom Autonomous system 
16637      161        440          90   MTN Network Solutions
36874      139         24           6   Cybersmart
29975      131        475          17   Vodacom
37061      108          9           2   One Communications Ltd
15706      106         16           5   Sudatel Internet Exchange Aut
37054       85          5          21   Data Telecom Service

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

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
 6389     3710       3855         265   bellsouth.net, inc. 
 4323     2629       1109         404   Time Warner Telecom
 4766     1915       9485         526   Korea Telecom (KIX)
19262     1841       4943         285   Verizon Global Networks 
 1785     1787        697         133   PaeTec Communications, Inc.
 7545     1594        301          82   TPG Internet Pty Ltd
20115     1519       1529         643   Charter Communications 
 6478     1476        291          56   AT&T Worldnet Services 
 4755     1401        636         159   TATA Communications formerly 
17974     1395        467          27   PT TELEKOMUNIKASI INDONESIA

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

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

  ASN   No of nets  Net Savings Description
 4323      2629        2225      Time Warner Telecom
 1785      1787        1654      PaeTec Communications, Inc.
19262      1841        1556      Verizon Global Networks 
 7545      1594        1512      TPG Internet Pty Ltd
 6478      1476        1420      AT&T Worldnet Services 
 4766      1915        1389      Korea Telecom (KIX)
17974      1395        1368      PT TELEKOMUNIKASI INDONESIA
 4755      1401        1242      TATA Communications formerly 
22773      1274        1197      Cox Communications, Inc.
10620      1358        1193      TVCABLE BOGOTA 

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

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

Bad AS  Designation  Network              Transit AS  Description
16927   UNALLOCATED  12.0.252.0/23         7018       AT&T WorldNet Servic
15132   UNALLOCATED  12.9.150.0/24         7018       AT&T WorldNet Servic
32567   UNALLOCATED  12.14.170.0/24        4323       Time Warner Telecom
13746   UNALLOCATED  12.24.56.0/24         7018       AT&T WorldNet Servic
32567   UNALLOCATED  12.25.107.0/24        4323       Time Warner Telecom
26973   UNALLOCATED  12.39.152.0/24        7018       AT&T WorldNet Servic
26973   UNALLOCATED  12.39.154.0/23        7018       AT&T WorldNet Servic
26973   UNALLOCATED  12.39.155.0/24        7018       AT&T WorldNet Servic
26973   UNALLOCATED  12.39.159.0/24        7018       AT&T WorldNet Servic
25639   UNALLOCATED  12.41.169.0/24        7018       AT&T WorldNet Servic

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

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

Network            Origin AS  Description
5.0.0.0/16           12654     RIPE NCC RIS Project
5.1.0.0/21           12654     RIPE NCC RIS Project
5.1.24.0/24          12654     RIPE NCC RIS Project
24.129.192.0/19       7922     Continental Cablevision 
37.0.0.0/16          12654     RIPE NCC RIS Project
37.1.0.0/21          12654     RIPE NCC RIS Project
37.1.24.0/24         12654     RIPE NCC RIS Project
41.57.192.0/18       22750     BCSNET
41.78.192.0/22       30999     Emtel is GSM, 3G and ISP in M
41.222.79.0/24       36938     >>UNKNOWN<<

Complete listing at http://thyme.rand.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       /9:10      /10:26      /11:71      /12:214     
/13:440     /14:765     /15:1358    /16:11463   /17:5579    /18:9215    
/19:18750   /20:24139   /21:24535   /22:32307   /23:30984   /24:177748  
/25:979     /26:1061    /27:578     /28:162     /29:16      /30:2       
/31:0       /32:8       

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

  ASN   No of nets  Total ann.   Description
 6389     2289          3710      bellsouth.net, inc. 
 6478     1430          1476      AT&T Worldnet Services 
 4323     1417          2629      Time Warner Telecom
10620     1249          1358      TVCABLE BOGOTA 
11492     1222          1266      Cable One 
18566     1092          1111      Covad Communications 
 7011     1065          1168      Citizens Utilities 
 1785     1059          1787      PaeTec Communications, Inc.
19262      954          1841      Verizon Global Networks 
 6503      933          1149      AVANTEL, S.A. 

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

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

   1:167       2:30        4:13        5:1         8:331      12:2029   
  13:1        14:381      15:15       16:3        17:8        20:9      
  23:1        24:1466     27:548      32:61       33:5        34:2      
  36:1        37:1        38:693      40:101      41:1617     42:1      
  44:3        46:514      47:5        49:143      50:74       52:12     
  55:6        56:2        57:30       58:870      59:483      60:391    
  61:1119     62:783      63:1924     64:3761     65:2331     66:4068   
  67:1754     68:998      69:2866     70:717      71:392      72:1987   
  73:1        74:2302     75:293      76:329      77:851      78:692    
  79:436      80:1022     81:767      82:508      83:470      84:458    
  85:1044     86:512      87:727      88:359      89:1579     90:159    
  91:3424     92:492      93:1041     94:1154     95:779      96:413    
  97:249      98:756      99:33      101:24      107:3       108:81     
 109:856     110:471     111:695     112:313     113:346     114:495    
 115:635     116:879     117:673     118:646     119:1031    120:234    
 121:702     122:1610    123:1050    124:1269    125:1213    128:247    
 129:158     130:174     131:570     132:110     133:20      134:218    
 135:49      136:216     137:147     138:293     139:120     140:491    
 141:198     142:360     143:377     144:488     145:51      146:426    
 147:194     148:625     149:273     150:151     151:230     152:303    
 153:175     154:3       155:346     156:174     157:341     158:128    
 159:377     160:313     161:203     162:277     163:117     164:484    
 165:336     166:481     167:422     168:739     169:150     170:746    
 171:66      172:1       173:1264    174:511     175:308     176:1      
 177:4       178:760     180:754     182:399     183:251     184:207    
 186:957     187:799     188:906     189:1015    190:4438    192:5782   
 193:4796    194:3466    195:2930    196:1024    197:3       198:3551   
 199:3749    200:5585    201:1583    202:8274    203:8431    204:4092   
 205:2347    206:2533    207:2967    208:3884    209:3493    210:2629   
 211:1330    212:1852    213:1622    214:751     215:62      216:4824   
 217:1489    218:526     219:375     220:1202    221:448     222:319    
 223:93     

End of report




More information about the NANOG mailing list