Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Jan 21 12:28:20 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 22 Jan, 2011

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

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

BGP routing table entries examined:                              343083
    Prefixes after maximum aggregation:                          154693
    Deaggregation factor:                                          2.22
    Unique aggregates announced to Internet:                     169275
Total ASes present in the Internet Routing Table:                 35688
    Prefixes per ASN:                                              9.61
Origin-only ASes present in the Internet Routing Table:           30754
Origin ASes announcing only one prefix:                           14951
Transit ASes present in the Internet Routing Table:                4934
Transit-only ASes present in the Internet Routing Table:            119
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      33
    Max AS path prepend of ASN (36992)                               29
Prefixes from unregistered ASNs in the Routing Table:               316
    Unregistered ASNs in the Routing Table:                         128
Number of 32-bit ASNs allocated by the RIRs:                       1028
Prefixes from 32-bit ASNs in the Routing Table:                       5
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            209
Number of addresses announced to Internet:                   2341691488
    Equivalent to 139 /8s, 147 /16s and 96 /24s
    Percentage of available address space announced:               63.2
    Percentage of allocated address space announced:               65.2
    Percentage of available address space allocated:               96.8
    Percentage of address space in use by end-sites:               87.7
Total number of prefixes smaller than registry allocations:      141157

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

Prefixes being announced by APNIC Region ASes:                    85214
    Total APNIC prefixes after maximum aggregation:               28749
    APNIC Deaggregation factor:                                    2.96
Prefixes being announced from the APNIC address blocks:           82002
    Unique aggregates announced from the APNIC address blocks:    35485
APNIC Region origin ASes present in the Internet Routing Table:    4304
    APNIC Prefixes per ASN:                                       19.05
APNIC Region origin ASes announcing only one prefix:               1214
APNIC Region transit ASes present in the Internet Routing Table:    692
Average APNIC Region AS path length visible:                        4.4
    Max APNIC Region AS path length visible:                         20
Number of APNIC addresses announced to Internet:              582320928
    Equivalent to 34 /8s, 181 /16s and 131 /24s
    Percentage of available APNIC address space announced:         78.9

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:                    138032
    Total ARIN prefixes after maximum aggregation:                70612
    ARIN Deaggregation factor:                                     1.95
Prefixes being announced from the ARIN address blocks:           108815
    Unique aggregates announced from the ARIN address blocks:     44359
ARIN Region origin ASes present in the Internet Routing Table:    14136
    ARIN Prefixes per ASN:                                         7.70
ARIN Region origin ASes announcing only one prefix:                5402
ARIN Region transit ASes present in the Internet Routing Table:    1479
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          23
Number of ARIN addresses announced to Internet:               746005632
    Equivalent to 44 /8s, 119 /16s and 36 /24s
    Percentage of available ARIN address space announced:          62.6

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:                     80701
    Total RIPE prefixes after maximum aggregation:                46018
    RIPE Deaggregation factor:                                     1.75
Prefixes being announced from the RIPE address blocks:            74128
    Unique aggregates announced from the RIPE address blocks:     48092
RIPE Region origin ASes present in the Internet Routing Table:    15214
    RIPE Prefixes per ASN:                                         4.87
RIPE Region origin ASes announcing only one prefix:                7769
RIPE Region transit ASes present in the Internet Routing Table:    2372
Average RIPE Region AS path length visible:                         4.6
    Max RIPE Region AS path length visible:                          33
Number of RIPE addresses announced to Internet:               456088640
    Equivalent to 27 /8s, 47 /16s and 92 /24s
    Percentage of available RIPE address space announced:          75.5

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:                   31439
    Total LACNIC prefixes after maximum aggregation:               7222
    LACNIC Deaggregation factor:                                   4.35
Prefixes being announced from the LACNIC address blocks:          30223
    Unique aggregates announced from the LACNIC address blocks:   15725
LACNIC Region origin ASes present in the Internet Routing Table:   1419
    LACNIC Prefixes per ASN:                                      21.30
LACNIC Region origin ASes announcing only one prefix:               429
LACNIC Region transit ASes present in the Internet Routing Table:   247
Average LACNIC Region AS path length visible:                       4.4
    Max LACNIC Region AS path length visible:                        19
Number of LACNIC addresses announced to Internet:              79629312
    Equivalent to 4 /8s, 191 /16s and 12 /24s
    Percentage of available LACNIC address space announced:        59.3

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:                   7474
    Total AfriNIC prefixes after maximum aggregation:              1973
    AfriNIC Deaggregation factor:                                  3.79
Prefixes being announced from the AfriNIC address blocks:          5799
    Unique aggregates announced from the AfriNIC address blocks:   1913
AfriNIC Region origin ASes present in the Internet Routing Table:   435
    AfriNIC Prefixes per ASN:                                     13.33
AfriNIC Region origin ASes announcing only one prefix:              137
AfriNIC Region transit ASes present in the Internet Routing Table:   93
Average AfriNIC Region AS path length visible:                      5.5
    Max AfriNIC Region AS path length visible:                       31
Number of AfriNIC addresses announced to Internet:             21744896
    Equivalent to 1 /8s, 75 /16s and 205 /24s
    Percentage of available AfriNIC address space announced:       43.2

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     1911       9485         522   Korea Telecom (KIX)
 7545     1586        301          82   TPG Internet Pty Ltd
 4755     1400        636         160   TATA Communications formerly 
17974     1385        467          27   PT TELEKOMUNIKASI INDONESIA
24560     1095        317         181   Bharti Airtel Ltd., Telemedia
 9583     1043         76         486   Sify Limited
 4808     1019       2108         287   CNCGROUP IP network: China169
17488      949        162         103   Hathway IP Over Cable Interne
18101      920        116         140   Reliance Infocom Ltd Internet
 9829      862        729          48   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         266   bellsouth.net, inc. 
 4323     2648       1077         403   Time Warner Telecom
19262     1839       4943         283   Verizon Global Networks 
 1785     1790        697         133   PaeTec Communications, Inc.
20115     1525       1530         641   Charter Communications 
 6478     1465        290          89   AT&T Worldnet Services 
 7018     1369       5650         882   AT&T WorldNet Services
 2386     1299        553         934   AT&T Data Communications Serv
22773     1275       2864          77   Cox Communications, Inc.
11492     1266        234          78   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      500       1763         306   UPC Distribution Services
 9198      462        266          14   Kazakhtelecom Data Network Ad
34984      457         97         137   BILISIM TELEKOM
 3292      444       2010         387   TDC Tele Danmark
 8866      439        137          24   Bulgarian Telecommunication C
12479      404        577           6   Uni2 Autonomous System
 8551      402        353          46   Bezeq International
 3320      399       7618         349   Deutsche Telekom AG
  702      398       1833         311   UUNET - Commercial IP service
20940      387         90         299   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     1355        251         165   TVCABLE BOGOTA 
 8151     1329       2613         363   UniNet S.A. de C.V. 
28573     1231        953          86   NET Servicos de Comunicao S.A
 6503     1148        355          78   AVANTEL, S.A. 
 7303      886        461         113   Telecom Argentina Stet-France
14420      604         50          89   CORPORACION NACIONAL DE TELEC
22047      567        310          15   VTR PUNTO NET S.A. 
 3816      521        222         102   Empresa Nacional de Telecomun
 7738      478        922          30   Telecomunicacoes da Bahia S.A
14117      455         33          33   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
24863      755        147          39   LINKdotNET AS number
 8452      744        445          11   TEDATA
36992      663        283         155   Etisalat MISR
 3741      264        987         226   The Internet Solution 
24835      216         78          10   RAYA Telecom - Egypt
 6713      203        199          12   Itissalat Al-MAGHRIB
29571      194         19          11   Ci Telecom Autonomous system 
33776      182         12          14   Starcomms Nigeria Limited
 2018      167        277          64   Tertiary Education Network 
16637      160        440          90   MTN Network Solutions

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         266   bellsouth.net, inc. 
 4323     2648       1077         403   Time Warner Telecom
 4766     1911       9485         522   Korea Telecom (KIX)
19262     1839       4943         283   Verizon Global Networks 
 1785     1790        697         133   PaeTec Communications, Inc.
 7545     1586        301          82   TPG Internet Pty Ltd
20115     1525       1530         641   Charter Communications 
 6478     1465        290          89   AT&T Worldnet Services 
 4755     1400        636         160   TATA Communications formerly 
17974     1385        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      2648        2245      Time Warner Telecom
 1785      1790        1657      PaeTec Communications, Inc.
19262      1839        1556      Verizon Global Networks 
 7545      1586        1504      TPG Internet Pty Ltd
 4766      1911        1389      Korea Telecom (KIX)
 6478      1465        1376      AT&T Worldnet Services 
17974      1385        1358      PT TELEKOMUNIKASI INDONESIA
 4755      1400        1240      TATA Communications formerly 
22773      1275        1198      Cox Communications, Inc.
10620      1355        1190      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
41.222.79.0/24       36938     >>UNKNOWN<<
41.223.92.0/22       36936     >>UNKNOWN<<
46.226.80.0/21       38927     Net-Build GmbH

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      /10:25      /11:70      /12:214     
/13:438     /14:762     /15:1355    /16:11484   /17:5608    /18:9296    
/19:18931   /20:24183   /21:24581   /22:32450   /23:31398   /24:179439  
/25:980     /26:1080    /27:574     /28:160     /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. 
 4323     1430          2648      Time Warner Telecom
 6478     1419          1465      AT&T Worldnet Services 
10620     1246          1355      TVCABLE BOGOTA 
11492     1222          1266      Cable One 
18566     1118          1137      Covad Communications 
 7011     1068          1171      Citizens Utilities 
 1785     1061          1790      PaeTec Communications, Inc.
19262      952          1839      Verizon Global Networks 
 6503      934          1148      AVANTEL, S.A. 

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

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

   1:165       2:26        4:13        5:1         8:330      12:2029   
  13:1        14:378      15:15       16:3        17:8        20:9      
  23:1        24:1456     27:544      32:61       33:5        34:2      
  36:1        37:1        38:688      40:101      41:2301     42:1      
  44:3        46:525      47:5        49:142      50:56       52:12     
  55:8        56:2        57:31       58:869      59:483      60:391    
  61:1136     62:1011     63:1925     64:3754     65:2339     66:4102   
  67:1752     68:998      69:2878     70:719      71:392      72:1990   
  73:1        74:2296     75:291      76:326      77:852      78:705    
  79:433      80:1038     81:815      82:529      83:456      84:644    
  85:1043     86:526      87:727      88:350      89:1565     90:154    
  91:3419     92:492      93:1050     94:1150     95:761      96:413    
  97:249      98:751      99:33      101:18      107:3       108:79     
 109:847     110:465     111:698     112:309     113:366     114:490    
 115:633     116:885     117:677     118:631     119:1035    120:240    
 121:707     122:1606    123:1044    124:1264    125:1210    128:247    
 129:157     130:171     131:569     132:110     133:20      134:217    
 135:50      136:216     137:146     138:292     139:127     140:488    
 141:198     142:361     143:379     144:486     145:52      146:425    
 147:199     148:625     149:304     150:151     151:230     152:303    
 153:175     154:3       155:346     156:173     157:341     158:126    
 159:377     160:314     161:200     162:278     163:159     164:469    
 165:334     166:599     167:421     168:742     169:151     170:747    
 171:69      172:2       173:1246    174:506     175:306     176:1      
 177:4       178:745     180:758     182:391     183:249     184:204    
 186:938     187:807     188:906     189:1026    190:4359    192:5783   
 193:4788    194:3497    195:2934    196:1243    197:2       198:3552   
 199:3737    200:5607    201:1574    202:8288    203:8434    204:4083   
 205:2335    206:2525    207:2970    208:3863    209:3468    210:2638   
 211:1333    212:1863    213:1722    214:742     215:62      216:4840   
 217:1623    218:547     219:373     220:1198    221:445     222:346    
 223:90     

End of report




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