Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri May 13 13:59:41 CDT 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 14 May, 2011

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

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

BGP routing table entries examined:                              356656
    Prefixes after maximum aggregation:                          161598
    Deaggregation factor:                                          2.21
    Unique aggregates announced to Internet:                     176105
Total ASes present in the Internet Routing Table:                 37552
    Prefixes per ASN:                                              9.50
Origin-only ASes present in the Internet Routing Table:           31389
Origin ASes announcing only one prefix:                           15082
Transit ASes present in the Internet Routing Table:                5092
Transit-only ASes present in the Internet Routing Table:            136
Average AS path length visible in the Internet Routing Table:       4.4
    Max AS path length visible:                                      36
    Max AS path prepend of ASN (48687)                               24
Prefixes from unregistered ASNs in the Routing Table:               626
    Unregistered ASNs in the Routing Table:                         320
Number of 32-bit ASNs allocated by the RIRs:                       1348
Number of 32-bit ASNs visible in the Routing Table:                1071
Prefixes from 32-bit ASNs in the Routing Table:                    2417
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            156
Number of addresses announced to Internet:                   2425507776
    Equivalent to 144 /8s, 146 /16s and 79 /24s
    Percentage of available address space announced:               65.4
    Percentage of allocated address space announced:               65.4
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               90.7
Total number of prefixes smaller than registry allocations:      148116

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

Prefixes being announced by APNIC Region ASes:                    89380
    Total APNIC prefixes after maximum aggregation:               29933
    APNIC Deaggregation factor:                                    2.99
Prefixes being announced from the APNIC address blocks:           85747
    Unique aggregates announced from the APNIC address blocks:    36599
APNIC Region origin ASes present in the Internet Routing Table:    4441
    APNIC Prefixes per ASN:                                       19.31
APNIC Region origin ASes announcing only one prefix:               1232
APNIC Region transit ASes present in the Internet Routing Table:    705
Average APNIC Region AS path length visible:                        4.6
    Max APNIC Region AS path length visible:                         18
Number of APNIC region 32-bit ASNs visible in the Routing Table:     47
Number of APNIC addresses announced to Internet:              614205216
    Equivalent to 36 /8s, 156 /16s and 7 /24s
    Percentage of available APNIC address space announced:         77.9

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,  39/8,  42/8,  43/8,
                        49/8,  58/8,  59/8,  60/8,  61/8, 101/8, 103/8,
                       106/8, 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:                    140013
    Total ARIN prefixes after maximum aggregation:                71448
    ARIN Deaggregation factor:                                     1.96
Prefixes being announced from the ARIN address blocks:           112260
    Unique aggregates announced from the ARIN address blocks:     45485
ARIN Region origin ASes present in the Internet Routing Table:    14368
    ARIN Prefixes per ASN:                                         7.81
ARIN Region origin ASes announcing only one prefix:                5485
ARIN Region transit ASes present in the Internet Routing Table:    1497
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          23
Number of ARIN region 32-bit ASNs visible in the Routing Table:      12
Number of ARIN addresses announced to Internet:               800054528
    Equivalent to 47 /8s, 175 /16s and 221 /24s
    Percentage of available ARIN address space announced:          63.6

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,  45/8,  47/8,  48/8,  50/8,  52/8,
                        53/8,  54/8,  55/8,  56/8,  57/8,  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, 104/8, 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:                     84162
    Total RIPE prefixes after maximum aggregation:                48126
    RIPE Deaggregation factor:                                     1.75
Prefixes being announced from the RIPE address blocks:            77641
    Unique aggregates announced from the RIPE address blocks:     51249
RIPE Region origin ASes present in the Internet Routing Table:    15589
    RIPE Prefixes per ASN:                                         4.98
RIPE Region origin ASes announcing only one prefix:                7801
RIPE Region transit ASes present in the Internet Routing Table:    2460
Average RIPE Region AS path length visible:                         4.7
    Max RIPE Region AS path length visible:                          36
Number of RIPE region 32-bit ASNs visible in the Routing Table:     790
Number of RIPE addresses announced to Internet:               468684800
    Equivalent to 27 /8s, 239 /16s and 144 /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, 185/8, 193/8, 194/8, 195/8, 212/8,
                       213/8, 217/8,

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

Prefixes being announced by LACNIC Region ASes:                   32698
    Total LACNIC prefixes after maximum aggregation:               7496
    LACNIC Deaggregation factor:                                   4.36
Prefixes being announced from the LACNIC address blocks:          31756
    Unique aggregates announced from the LACNIC address blocks:   16683
LACNIC Region origin ASes present in the Internet Routing Table:   1449
    LACNIC Prefixes per ASN:                                      21.92
LACNIC Region origin ASes announcing only one prefix:               427
LACNIC Region transit ASes present in the Internet Routing Table:   268
Average LACNIC Region AS path length visible:                       4.4
    Max LACNIC Region AS path length visible:                        19
Number of LACNIC region 32-bit ASNs visible in the Routing Table:   217
Number of LACNIC addresses announced to Internet:              83360256
    Equivalent to 4 /8s, 247 /16s and 250 /24s
    Percentage of available LACNIC address space announced:        55.2

LACNIC AS Blocks       26592-26623, 27648-28671, 52224-53247,
                       262144-263167 plus ERX transfers
LACNIC Address Blocks  177/8, 179/8, 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:                   7770
    Total AfriNIC prefixes after maximum aggregation:              1867
    AfriNIC Deaggregation factor:                                  4.16
Prefixes being announced from the AfriNIC address blocks:          6122
    Unique aggregates announced from the AfriNIC address blocks:   1939
AfriNIC Region origin ASes present in the Internet Routing Table:   447
    AfriNIC Prefixes per ASN:                                     13.70
AfriNIC Region origin ASes announcing only one prefix:              137
AfriNIC Region transit ASes present in the Internet Routing Table:   97
Average AfriNIC Region AS path length visible:                      4.8
    Max AfriNIC Region AS path length visible:                       24
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:    5
Number of AfriNIC addresses announced to Internet:             23095040
    Equivalent to 1 /8s, 96 /16s and 103 /24s
    Percentage of available AfriNIC address space announced:       34.4

AfriNIC AS Blocks      36864-37887, 327680-328703 & ERX transfers
AfriNIC Address Blocks  41/8, 102/8, 105/8, 197/8,

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
 4766     2452       9493         916   Korea Telecom (KIX)
17974     1834        516          32   PT TELEKOMUNIKASI INDONESIA
 7545     1549        301          87   TPG Internet Pty Ltd
 4755     1461        634         167   TATA Communications formerly 
24560     1151        336         184   Bharti Airtel Ltd., Telemedia
 7552     1105       1064           7   Vietel Corporation
 9583     1079         80         510   Sify Limited
 4808     1063       2130         297   CNCGROUP IP network: China169
 9829     1039        874          51   BSNL National Internet Backbo
17488      935        165         103   Hathway IP Over Cable Interne

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     3647       3822         255   bellsouth.net, inc. 
 4323     1979       1081         396   Time Warner Telecom
18566     1822        357         232   Covad Communications 
 1785     1775        681         124   PaeTec Communications, Inc.
 6478     1678        314          50   AT&T Worldnet Services 
20115     1535       1539         631   Charter Communications 
19262     1499       4949         299   Verizon Global Networks 
 7018     1357       6911         886   AT&T WorldNet Services
22773     1329       2897          87   Cox Communications, Inc.
11492     1279        240          15   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      519       1780         321   UPC Distribution Services
34984      512        106         182   BILISIM TELEKOM
 3292      459       1998         392   TDC Tele Danmark
20940      447        131         342   Akamai Technologies European 
 8866      442        134          26   Bulgarian Telecommunication C
29049      442         32          44   AzerSat LLC.
12479      430        577           6   Uni2 Autonomous System
 3320      420       7608         367   Deutsche Telekom AG
 8551      406        355          45   Bezeq International
  702      397       1802         310   UUNET - Commercial IP service

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     1476        272         154   TVCABLE BOGOTA 
 8151     1370       2702         362   UniNet S.A. de C.V. 
28573     1315        990          86   NET Servicos de Comunicao S.A
 7303      931        470         152   Telecom Argentina Stet-France
 6503      732        354          73   AVANTEL, S.A. 
14420      667         54          91   CORPORACION NACIONAL DE TELEC
22047      555        310          15   VTR PUNTO NET S.A. 
 3816      521        227         100   Empresa Nacional de Telecomun
13489      499        241         121   Orbitel S.A. E.S.P. 
11172      493         84          83   Servicios Alestra S.A de C.V 

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
 8452      888        445          11   TEDATA
24863      782        147          37   LINKdotNET AS number
15475      415         90           8   Nile Online
36992      288        331          17   Etisalat MISR
 3741      268        985         228   The Internet Solution 
 6713      241        215          13   Itissalat Al-MAGHRIB
24835      206         78          10   RAYA Telecom - Egypt
33776      200         12          11   Starcomms Nigeria Limited
29571      162         17          11   Ci Telecom Autonomous system 
16637      150        441          86   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     3647       3822         255   bellsouth.net, inc. 
 4766     2452       9493         916   Korea Telecom (KIX)
23456     2417        685        1317   32-bit ASN transition
 4323     1979       1081         396   Time Warner Telecom
17974     1834        516          32   PT TELEKOMUNIKASI INDONESIA
18566     1822        357         232   Covad Communications 
 1785     1775        681         124   PaeTec Communications, Inc.
 6478     1678        314          50   AT&T Worldnet Services 
 7545     1549        301          87   TPG Internet Pty Ltd
20115     1535       1539         631   Charter Communications 

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

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

  ASN   No of nets  Net Savings Description
17974      1834        1802      PT TELEKOMUNIKASI INDONESIA
 1785      1775        1651      PaeTec Communications, Inc.
 6478      1678        1628      AT&T Worldnet Services 
18566      1822        1590      Covad Communications 
 4323      1979        1583      Time Warner Telecom
 4766      2452        1536      Korea Telecom (KIX)
 7545      1549        1462      TPG Internet Pty Ltd
10620      1476        1322      TVCABLE BOGOTA 
 4755      1461        1294      TATA Communications formerly 
11492      1279        1264      Cable One 

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

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

Bad AS  Designation  Network              Transit AS  Description
15132   UNALLOCATED  12.9.150.0/24         7018       AT&T WorldNet Servic
32567   UNALLOCATED  12.14.170.0/24        4323       Time Warner Telecom
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
13317   UNALLOCATED  12.44.10.0/24         7018       AT&T WorldNet Servic
23502   UNALLOCATED  12.44.44.0/24         7018       AT&T WorldNet Servic

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

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

Network            Origin AS  Description
24.225.128.0/18      36377     Comcast Telecommunications, I
24.225.192.0/23      36377     Comcast Telecommunications, I
24.225.192.0/18      36377     Comcast Telecommunications, I
24.225.224.0/21      36377     Comcast Telecommunications, I
24.225.237.0/24      36377     Comcast Telecommunications, I
24.225.248.0/21      36377     Comcast Telecommunications, I
31.134.128.0/18      42668     RIPE Network Coordination Cen
31.220.160.0/19      29072     RDTC Autonomous System ISP at
31.222.96.0/22       29119     ServiHosting Autonomous Syste
31.222.100.0/22      29119     ServiHosting Autonomous Syste

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        /8:20       /9:12      /10:28      /11:78      /12:223     
/13:459     /14:790     /15:1390    /16:11723   /17:5766    /18:9707    
/19:19307   /20:25552   /21:25796   /22:34071   /23:32878   /24:185607  
/25:1092    /26:1271    /27:709     /28:161     /29:8       /30:2       
/31:0       /32:6       

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

  ASN   No of nets  Total ann.   Description
 6389     2247          3647      bellsouth.net, inc. 
18566     1784          1822      Covad Communications 
 6478     1632          1678      AT&T Worldnet Services 
10620     1366          1476      TVCABLE BOGOTA 
11492     1225          1279      Cable One 
23456     1188          2417      32-bit ASN transition
 7011     1062          1162      Citizens Utilities 
 1785     1050          1775      PaeTec Communications, Inc.
 4323      888          1979      Time Warner Telecom
22773      846          1329      Cox Communications, Inc.

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

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

   1:267       2:44        4:14        5:1         6:3         8:352    
  12:1985     13:1        14:456      15:15       16:3        17:8      
  20:10       23:7        24:1639     27:743      31:328      32:60     
  33:4        34:2        37:1        38:731      40:101      41:2501   
  42:5        44:3        46:903      47:4        49:177      50:401    
  52:13       55:6        56:2        57:30       58:848      59:485    
  60:387      61:1254     62:974      63:1925     64:3928     65:2299   
  66:4140     67:1866     68:1093     69:2986     70:706      71:350    
  72:1884     73:1        74:2345     75:306      76:342      77:865    
  78:689      79:463      80:1096     81:817      82:493      83:449    
  84:625      85:1071     86:598      87:746      88:325      89:1566   
  90:202      91:3732     92:512      93:1054     94:1251     95:803    
  96:483      97:246      98:828      99:35      101:59      103:12     
 106:1       107:6       108:85      109:944     110:585     111:711    
 112:319     113:399     114:532     115:666     116:954     117:683    
 118:818     119:1135    120:309     121:678     122:1621    123:1079   
 124:1257    125:1223    128:259     129:166     130:165     131:568    
 132:110     133:19      134:218     135:49      136:214     137:143    
 138:304     139:106     140:480     141:240     142:401     143:402    
 144:487     145:53      146:440     147:210     148:591     149:243    
 150:171     151:187     152:310     153:179     154:3       155:395    
 156:194     157:352     158:131     159:387     160:315     161:207    
 162:279     163:163     164:499     165:352     166:514     167:431    
 168:725     169:153     170:794     171:77      172:1       173:1557   
 174:543     175:370     177:120     178:908     180:840     181:16     
 182:439     183:205     184:262     185:1       186:1169    187:749    
 188:829     189:907     190:4793    192:5783    193:4843    194:3477   
 195:2973    196:1209    197:17      198:3570    199:3893    200:5535   
 201:1494    202:8359    203:8467    204:4111    205:2328    206:2725   
 207:2913    208:3966    209:3423    210:2731    211:1386    212:1973   
 213:1717    214:730     215:69      216:4818    217:1630    218:565    
 219:370     220:1203    221:483     222:342     223:145    

End of report




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