Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Nov 5 13:27:50 CDT 2010


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 06 Nov, 2010

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

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

BGP routing table entries examined:                              335410
    Prefixes after maximum aggregation:                          153270
    Deaggregation factor:                                          2.19
    Unique aggregates announced to Internet:                     164621
Total ASes present in the Internet Routing Table:                 35162
    Prefixes per ASN:                                              9.54
Origin-only ASes present in the Internet Routing Table:           30330
Origin ASes announcing only one prefix:                           14792
Transit ASes present in the Internet Routing Table:                4832
Transit-only ASes present in the Internet Routing Table:            116
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      30
    Max AS path prepend of ASN (41664)                               21
Prefixes from unregistered ASNs in the Routing Table:               299
    Unregistered ASNs in the Routing Table:                         127
Number of 32-bit ASNs allocated by the RIRs:                        867
Prefixes from 32-bit ASNs in the Routing Table:                       4
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            194
Number of addresses announced to Internet:                   2328157088
    Equivalent to 138 /8s, 196 /16s and 219 /24s
    Percentage of available address space announced:               62.8
    Percentage of allocated address space announced:               66.4
    Percentage of available address space allocated:               94.6
    Percentage of address space in use by end-sites:               85.8
Total number of prefixes smaller than registry allocations:      137579

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

Prefixes being announced by APNIC Region ASes:                    82365
    Total APNIC prefixes after maximum aggregation:               28058
    APNIC Deaggregation factor:                                    2.94
Prefixes being announced from the APNIC address blocks:           79257
    Unique aggregates announced from the APNIC address blocks:    34526
APNIC Region origin ASes present in the Internet Routing Table:    4225
    APNIC Prefixes per ASN:                                       18.76
APNIC Region origin ASes announcing only one prefix:               1176
APNIC Region transit ASes present in the Internet Routing Table:    677
Average APNIC Region AS path length visible:                        4.4
    Max APNIC Region AS path length visible:                         19
Number of APNIC addresses announced to Internet:              560267808
    Equivalent to 33 /8s, 101 /16s and 2 /24s
    Percentage of available APNIC address space announced:         75.9

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:                    137613
    Total ARIN prefixes after maximum aggregation:                71343
    ARIN Deaggregation factor:                                     1.93
Prefixes being announced from the ARIN address blocks:           108974
    Unique aggregates announced from the ARIN address blocks:     43620
ARIN Region origin ASes present in the Internet Routing Table:    14020
    ARIN Prefixes per ASN:                                         7.77
ARIN Region origin ASes announcing only one prefix:                5368
ARIN Region transit ASes present in the Internet Routing Table:    1482
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          23
Number of ARIN addresses announced to Internet:               739981824
    Equivalent to 44 /8s, 27 /16s and 58 /24s
    Percentage of available ARIN address space announced:          63.0

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,  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,  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, 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:                     77520
    Total RIPE prefixes after maximum aggregation:                44665
    RIPE Deaggregation factor:                                     1.74
Prefixes being announced from the RIPE address blocks:            71009
    Unique aggregates announced from the RIPE address blocks:     46311
RIPE Region origin ASes present in the Internet Routing Table:    14943
    RIPE Prefixes per ASN:                                         4.75
RIPE Region origin ASes announcing only one prefix:                7688
RIPE Region transit ASes present in the Internet Routing Table:    2300
Average RIPE Region AS path length visible:                         4.4
    Max RIPE Region AS path length visible:                          30
Number of RIPE addresses announced to Internet:               443477760
    Equivalent to 26 /8s, 110 /16s and 239 /24s
    Percentage of available RIPE address space announced:          77.7

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, 196608-197631
RIPE Address Blocks      2/8,  25/8,  31/8,  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:                   30074
    Total LACNIC prefixes after maximum aggregation:               7209
    LACNIC Deaggregation factor:                                   4.17
Prefixes being announced from the LACNIC address blocks:          28751
    Unique aggregates announced from the LACNIC address blocks:   15206
LACNIC Region origin ASes present in the Internet Routing Table:   1378
    LACNIC Prefixes per ASN:                                      20.86
LACNIC Region origin ASes announcing only one prefix:               429
LACNIC Region transit ASes present in the Internet Routing Table:   238
Average LACNIC Region AS path length visible:                       4.4
    Max LACNIC Region AS path length visible:                        26
Number of LACNIC addresses announced to Internet:              76695296
    Equivalent to 4 /8s, 146 /16s and 71 /24s
    Percentage of available LACNIC address space announced:        57.1

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:                   7608
    Total AfriNIC prefixes after maximum aggregation:              1876
    AfriNIC Deaggregation factor:                                  4.06
Prefixes being announced from the AfriNIC address blocks:          5911
    Unique aggregates announced from the AfriNIC address blocks:   1715
AfriNIC Region origin ASes present in the Internet Routing Table:   416
    AfriNIC Prefixes per ASN:                                     14.21
AfriNIC Region origin ASes announcing only one prefix:              131
AfriNIC Region transit ASes present in the Internet Routing Table:   90
Average AfriNIC Region AS path length visible:                      5.1
    Max AfriNIC Region AS path length visible:                       21
Number of AfriNIC addresses announced to Internet:             21476608
    Equivalent to 1 /8s, 71 /16s and 181 /24s
    Percentage of available AfriNIC address space announced:       64.0

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

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

  ASN   No of nets  /20 equiv  MaxAgg  Description
 4766     1858       9453         512   Korea Telecom (KIX)
 7545     1420        299          77   TPG Internet Pty Ltd
 4755     1381        379         158   TATA Communications formerly 
17488     1364        156         121   Hathway IP Over Cable Interne
17974     1282        304          89   PT TELEKOMUNIKASI INDONESIA
24560     1055        309         173   Bharti Airtel Ltd., Telemedia
 9583     1032         76         491   Sify Limited
 4808      978       1721         266   CNCGROUP IP network: China169
18101      897        116         135   Reliance Infocom Ltd Internet
 9829      826        694          27   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     3761       3922         279   bellsouth.net, inc. 
 4323     2652       1105         397   Time Warner Telecom
 1785     1794        698         130   PaeTec Communications, Inc.
19262     1779       4836         281   Verizon Global Networks 
20115     1505       1528         642   Charter Communications 
 7018     1412       5660         903   AT&T WorldNet Services
 6478     1395        280         111   AT&T Worldnet Services 
 2386     1307        555         925   AT&T Data Communications Serv
11492     1251        232          65   Cable One 
22773     1227       2859          62   Cox Communications, Inc.

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
 3292      446       2028         390   TDC Tele Danmark
 8866      435        133          25   Bulgarian Telecommunication C
 8551      402        353          46   Bezeq International
  702      397       1866         311   UUNET - Commercial IP service
34984      382         91         189   BILISIM TELEKOM
 3320      378       7332         331   Deutsche Telekom AG
 3301      377       1688         334   TeliaNet Sweden
30890      377         95         123   Evolva Telecom
12479      370        576           5   Uni2 Autonomous System
31148      349         18          83   FreeNet ISP

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     1333        249         154   TVCABLE BOGOTA 
 8151     1331       2599         368   UniNet S.A. de C.V. 
28573     1183        928          84   NET Servicos de Comunicao S.A
 7303      830        441         107   Telecom Argentina Stet-France
 6503      806        225         258   AVANTEL, S.A. 
22047      565        310          15   VTR PUNTO NET S.A. 
14420      559         44          74   CORPORACION NACIONAL DE TELEC
 3816      487        212          96   Empresa Nacional de Telecomun
 7738      478        922          30   Telecomunicacoes da Bahia S.A
14117      453         32          28   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
 8452     1114        445          10   TEDATA
24863      741        147          39   LINKdotNET AS number
36992      648        277         159   Etisalat MISR
 3741      263        907         225   The Internet Solution 
24835      206         78          10   RAYA Telecom - Egypt
 6713      203        199          12   Itissalat Al-MAGHRIB
29571      203         19          11   Ci Telecom Autonomous system 
 2018      197        277          64   Tertiary Education Network 
33776      195         12          14   Starcomms Nigeria Limited
16637      154        441          91   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     3761       3922         279   bellsouth.net, inc. 
 4323     2652       1105         397   Time Warner Telecom
 4766     1858       9453         512   Korea Telecom (KIX)
 1785     1794        698         130   PaeTec Communications, Inc.
19262     1779       4836         281   Verizon Global Networks 
20115     1505       1528         642   Charter Communications 
 7545     1420        299          77   TPG Internet Pty Ltd
 7018     1412       5660         903   AT&T WorldNet Services
 6478     1395        280         111   AT&T Worldnet Services 
 4755     1381        379         158   TATA Communications formerly 

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      2652        2255      Time Warner Telecom
 1785      1794        1664      PaeTec Communications, Inc.
19262      1779        1498      Verizon Global Networks 
 4766      1858        1346      Korea Telecom (KIX)
 7545      1420        1343      TPG Internet Pty Ltd
 6478      1395        1284      AT&T Worldnet Services 
17488      1364        1243      Hathway IP Over Cable Interne
 4755      1381        1223      TATA Communications formerly 
17974      1282        1193      PT TELEKOMUNIKASI INDONESIA
11492      1251        1186      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
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
31.0.0.0/16          12654     RIPE NCC RIS Project
31.1.0.0/21          12654     RIPE NCC RIS Project
31.1.24.0/24         12654     RIPE NCC RIS Project
36.0.0.0/8           38639     NTT Communications Corporatio
41.222.79.0/24       36938     >>UNKNOWN<<
41.223.92.0/22       36936     >>UNKNOWN<<
42.0.0.0/8           38639     NTT Communications Corporatio
46.21.144.0/20       35017     Neoworld Ltd. Autonomous Syst
46.21.156.0/22       35017     Neoworld Ltd. Autonomous Syst
46.148.64.0/20       35491     TPNETS

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        /8:21       /9:10      /10:25      /11:68      /12:206     
/13:421     /14:746     /15:1347    /16:11386   /17:5572    /18:9338    
/19:18553   /20:23931   /21:23896   /22:31584   /23:30514   /24:174963  
/25:975     /26:1098    /27:582     /28:153     /29:12      /30:2       
/31:0       /32:7       

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

  ASN   No of nets  Total ann.   Description
 6389     2324          3761      bellsouth.net, inc. 
 4323     1425          2652      Time Warner Telecom
 6478     1356          1395      AT&T Worldnet Services 
10620     1225          1333      TVCABLE BOGOTA 
11492     1208          1251      Cable One 
 1785     1074          1794      PaeTec Communications, Inc.
18566     1071          1090      Covad Communications 
 7011     1058          1159      Citizens Utilities 
 8452     1012          1114      TEDATA
19262      903          1779      Verizon Global Networks 

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

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

   1:93        2:13        4:13        8:313      12:2008     13:8      
  14:55       15:18       16:3        17:8        20:9        24:1415   
  27:424      31:1        32:61       33:10       38:716      40:101    
  41:2628     44:3        46:246      47:10       49:4        50:6      
  52:12       55:6        56:2        57:29       58:837      59:480    
  60:496      61:1137     62:1014     63:1965     64:3752     65:2332   
  66:4078     67:1821     68:1121     69:2890     70:754      71:374    
  72:1897     73:2        74:2330     75:289      76:324      77:855    
  78:669      79:448      80:1059     81:796      82:500      83:465    
  84:683      85:1017     86:478      87:698      88:331      89:1573   
  90:113      91:3148     92:445      93:987      94:1120     95:705    
  96:399      97:225      98:629      99:33      101:3       107:1      
 108:64      109:739     110:412     111:618     112:314     113:312    
 114:474     115:616     116:1131    117:660     118:564     119:1001   
 120:136     121:709     122:1609    123:970     124:1226    125:1271   
 128:229     129:150     130:166     131:556     132:278     133:20     
 134:207     135:46      136:210     137:142     138:281     139:110    
 140:473     141:197     142:348     143:358     144:493     145:55     
 146:427     147:184     148:621     149:323     150:146     151:231    
 152:291     153:174     154:3       155:364     156:163     157:338    
 158:114     159:365     160:313     161:199     162:275     163:164    
 164:427     165:349     166:469     167:426     168:684     169:155    
 170:719     171:63      172:2       173:1085    174:407     175:241    
 176:1       178:599     180:684     182:246     183:243     184:164    
 186:755     187:587     188:879     189:808     190:4177    192:5768   
 193:4768    194:3450    195:2841    196:1200    198:3537    199:3638   
 200:5411    201:1585    202:8208    203:8280    204:4032    205:2336   
 206:2566    207:3020    208:3887    209:3458    210:2550    211:1289   
 212:1813    213:1723    214:699     215:66      216:4751    217:1583   
 218:547     219:400     220:1227    221:421     222:343     223:68     


End of report




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