Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Jun 3 19:01:02 UTC 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 <pfsinoz at gmail.com>.

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

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

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

BGP routing table entries examined:                              358561
    Prefixes after maximum aggregation:                          162439
    Deaggregation factor:                                          2.21
    Unique aggregates announced to Internet:                     178183
Total ASes present in the Internet Routing Table:                 37775
    Prefixes per ASN:                                              9.49
Origin-only ASes present in the Internet Routing Table:           31544
Origin ASes announcing only one prefix:                           15151
Transit ASes present in the Internet Routing Table:                5102
Transit-only ASes present in the Internet Routing Table:            134
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      36
    Max AS path prepend of ASN (48687)                               24
Prefixes from unregistered ASNs in the Routing Table:               747
    Unregistered ASNs in the Routing Table:                         395
Number of 32-bit ASNs allocated by the RIRs:                       1425
Number of 32-bit ASNs visible in the Routing Table:                1129
Prefixes from 32-bit ASNs in the Routing Table:                    2579
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            165
Number of addresses announced to Internet:                   2450918336
    Equivalent to 146 /8s, 22 /16s and 11 /24s
    Percentage of available address space announced:               66.1
    Percentage of allocated address space announced:               66.1
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               91.0
Total number of prefixes smaller than registry allocations:      149599

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

Prefixes being announced by APNIC Region ASes:                    88800
    Total APNIC prefixes after maximum aggregation:               30084
    APNIC Deaggregation factor:                                    2.95
Prefixes being announced from the APNIC address blocks:           85253
    Unique aggregates announced from the APNIC address blocks:    36662
APNIC Region origin ASes present in the Internet Routing Table:    4475
    APNIC Prefixes per ASN:                                       19.05
APNIC Region origin ASes announcing only one prefix:               1253
APNIC Region transit ASes present in the Internet Routing Table:    705
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         20
Number of APNIC region 32-bit ASNs visible in the Routing Table:     47
Number of APNIC addresses announced to Internet:              619636256
    Equivalent to 36 /8s, 238 /16s and 230 /24s
    Percentage of available APNIC address space announced:         78.6

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:                    140579
    Total ARIN prefixes after maximum aggregation:                71516
    ARIN Deaggregation factor:                                     1.97
Prefixes being announced from the ARIN address blocks:           112681
    Unique aggregates announced from the ARIN address blocks:     46229
ARIN Region origin ASes present in the Internet Routing Table:    14406
    ARIN Prefixes per ASN:                                         7.82
ARIN Region origin ASes announcing only one prefix:                5495
ARIN Region transit ASes present in the Internet Routing Table:    1510
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:               801985792
    Equivalent to 47 /8s, 205 /16s and 85 /24s
    Percentage of available ARIN address space announced:          63.7

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:                     85208
    Total RIPE prefixes after maximum aggregation:                48504
    RIPE Deaggregation factor:                                     1.76
Prefixes being announced from the RIPE address blocks:            78635
    Unique aggregates announced from the RIPE address blocks:     52035
RIPE Region origin ASes present in the Internet Routing Table:    15661
    RIPE Prefixes per ASN:                                         5.02
RIPE Region origin ASes announcing only one prefix:                7830
RIPE Region transit ASes present in the Internet Routing Table:    2461
Average RIPE Region AS path length visible:                         4.6
    Max RIPE Region AS path length visible:                          36
Number of RIPE region 32-bit ASNs visible in the Routing Table:     834
Number of RIPE addresses announced to Internet:               475054592
    Equivalent to 28 /8s, 80 /16s and 194 /24s
    Percentage of available RIPE address space announced:          76.5

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:                   33171
    Total LACNIC prefixes after maximum aggregation:               7536
    LACNIC Deaggregation factor:                                   4.40
Prefixes being announced from the LACNIC address blocks:          32258
    Unique aggregates announced from the LACNIC address blocks:   16961
LACNIC Region origin ASes present in the Internet Routing Table:   1462
    LACNIC Prefixes per ASN:                                      22.06
LACNIC Region origin ASes announcing only one prefix:               431
LACNIC Region transit ASes present in the Internet Routing Table:   263
Average LACNIC Region AS path length visible:                       4.4
    Max LACNIC Region AS path length visible:                        29
Number of LACNIC region 32-bit ASNs visible in the Routing Table:   231
Number of LACNIC addresses announced to Internet:              84647424
    Equivalent to 5 /8s, 11 /16s and 158 /24s
    Percentage of available LACNIC address space announced:        56.1

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:                   7999
    Total AfriNIC prefixes after maximum aggregation:              1909
    AfriNIC Deaggregation factor:                                  4.19
Prefixes being announced from the AfriNIC address blocks:          6308
    Unique aggregates announced from the AfriNIC address blocks:   1917
AfriNIC Region origin ASes present in the Internet Routing Table:   458
    AfriNIC Prefixes per ASN:                                     13.77
AfriNIC Region origin ASes announcing only one prefix:              142
AfriNIC Region transit ASes present in the Internet Routing Table:  100
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:             23586048
    Equivalent to 1 /8s, 103 /16s and 229 /24s
    Percentage of available AfriNIC address space announced:       35.1

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     2460       9500         922   Korea Telecom (KIX)
17974     1541        441          38   PT TELEKOMUNIKASI INDONESIA
 7545     1537        301          86   TPG Internet Pty Ltd
 4755     1470        634         166   TATA Communications formerly 
24560     1155        337         187   Bharti Airtel Ltd., Telemedia
 7552     1141       1064           7   Vietel Corporation
 4808     1086       2144         308   CNCGROUP IP network: China169
 9583     1082         80         510   Sify Limited
 9829      956        843          82   BSNL National Internet Backbo
18101      931        116         139   Reliance Infocom Ltd Internet

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     3641       3822         256   bellsouth.net, inc. 
 4323     1973       1081         400   Time Warner Telecom
18566     1875        355         269   Covad Communications 
 1785     1790        681         122   PaeTec Communications, Inc.
 6478     1716        318          45   AT&T Worldnet Services 
20115     1535       1540         633   Charter Communications 
19262     1492       4936         307   Verizon Global Networks 
 7018     1367       7068         892   AT&T WorldNet Services
22773     1337       2897          88   Cox Communications, Inc.
 2386     1268        536         911   AT&T Data Communications Serv

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      517       1780         320   UPC Distribution Services
34984      517        106         179   BILISIM TELEKOM
 3292      461       2078         396   TDC Tele Danmark
20940      458        134         350   Akamai Technologies European 
29049      451         33          48   AzerSat LLC.
 8866      445        134          26   Bulgarian Telecommunication C
12479      432        593           7   Uni2 Autonomous System
 3320      425       8152         370   Deutsche Telekom AG
 8551      405        354          48   Bezeq International
  702      396       1803         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     1512        278         157   TVCABLE BOGOTA 
 8151     1383       2724         364   UniNet S.A. de C.V. 
28573     1319        992          86   NET Servicos de Comunicao S.A
 7303      960        504         154   Telecom Argentina Stet-France
 6503      734        354          73   AVANTEL, S.A. 
14420      675         54          89   CORPORACION NACIONAL DE TELEC
22047      565        310          15   VTR PUNTO NET S.A. 
 3816      527        231          93   Empresa Nacional de Telecomun
 7738      516        986          31   Telecomunicacoes da Bahia S.A
13489      515        262         124   Orbitel S.A. E.S.P. 

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      833        445          11   TEDATA
24863      721        147          37   LINKdotNET AS number
15475      544         90           8   Nile Online
36992      294        399          14   Etisalat MISR
 3741      265        937         226   The Internet Solution 
 6713      241        215          13   Itissalat Al-MAGHRIB
33776      218         12          11   Starcomms Nigeria Limited
24835      208         78          10   RAYA Telecom - Egypt
29571      193         19          12   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     3641       3822         256   bellsouth.net, inc. 
23456     2579        639        1398   32-bit ASN transition
 4766     2460       9500         922   Korea Telecom (KIX)
 4323     1973       1081         400   Time Warner Telecom
18566     1875        355         269   Covad Communications 
 1785     1790        681         122   PaeTec Communications, Inc.
 6478     1716        318          45   AT&T Worldnet Services 
17974     1541        441          38   PT TELEKOMUNIKASI INDONESIA
 7545     1537        301          86   TPG Internet Pty Ltd
20115     1535       1540         633   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
 6478      1716        1671      AT&T Worldnet Services 
 1785      1790        1668      PaeTec Communications, Inc.
18566      1875        1606      Covad Communications 
 4323      1973        1573      Time Warner Telecom
 4766      2460        1538      Korea Telecom (KIX)
17974      1541        1503      PT TELEKOMUNIKASI INDONESIA
 7545      1537        1451      TPG Internet Pty Ltd
10620      1512        1355      TVCABLE BOGOTA 
 4755      1470        1304      TATA Communications formerly 
22773      1337        1249      Cox Communications, Inc.

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
27.0.128.0/17         7514     Media Exchange, Inc.
41.190.32.0/23       31856     CABSAS
41.190.34.0/23       31856     CABSAS
41.190.36.0/23       31856     CABSAS

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      /11:81      /12:228     
/13:461     /14:798     /15:1395    /16:11917   /17:5834    /18:9733    
/19:19342   /20:25663   /21:25940   /22:34114   /23:33063   /24:186681  
/25:1084    /26:1275    /27:711     /28:165     /29:8       /30:2       
/31:0       /32:6       

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

  ASN   No of nets  Total ann.   Description
 6389     2243          3641      bellsouth.net, inc. 
18566     1838          1875      Covad Communications 
 6478     1670          1716      AT&T Worldnet Services 
10620     1402          1512      TVCABLE BOGOTA 
23456     1260          2579      32-bit ASN transition
11492     1107          1153      Cable One 
 7011     1061          1160      Citizens Utilities 
 1785     1050          1790      PaeTec Communications, Inc.
 4323      886          1973      Time Warner Telecom
22773      852          1337      Cox Communications, Inc.

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

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

   1:282       2:48        4:16        5:1         6:3         8:336    
  12:1980     13:1        14:464      15:15       16:3        17:8      
  20:10       23:6        24:1613     27:752      31:419      32:60     
  33:4        34:2        37:1        38:737      40:102      41:2524   
  42:6        44:3        46:934      47:3        49:200      50:435    
  52:13       54:2        55:6        56:2        57:29       58:840    
  59:479      60:387      61:1131     62:1035     63:1937     64:3941   
  65:2289     66:4148     67:1867     68:1091     69:2989     70:704    
  71:352      72:1883     73:1        74:2354     75:305      76:341    
  77:873      78:700      79:460      80:1078     81:836      82:493    
  83:440      84:677      85:1070     86:592      87:753      88:331    
  89:1531     90:203      91:3808     92:524      93:1049     94:1283   
  95:820      96:506      97:249      98:860      99:35      101:61     
 103:47      106:1       107:7       108:85      109:957     110:600    
 111:708     112:304     113:404     114:535     115:668     116:957    
 117:693     118:797     119:1148    120:311     121:671     122:1626   
 123:962     124:1270    125:1217    128:261     129:173     130:164    
 131:570     132:109     133:19      134:213     135:48      136:214    
 137:145     138:300     139:109     140:481     141:239     142:404    
 143:406     144:487     145:54      146:447     147:211     148:595    
 149:244     150:172     151:185     152:328     153:179     154:3      
 155:397     156:195     157:352     158:138     159:380     160:317    
 161:207     162:281     163:165     164:501     165:354     166:515    
 167:427     168:728     169:155     170:801     171:77      172:1      
 173:1554    174:551     175:370     176:130     177:145     178:995    
 180:858     181:18      182:459     183:211     184:293     185:1      
 186:1215    187:771     188:849     189:897     190:4863    192:5849   
 193:4901    194:3494    195:2997    196:1220    197:19      198:3565   
 199:3923    200:5547    201:1484    202:8271    203:8390    204:4180   
 205:2310    206:2686    207:2875    208:3973    209:3476    210:2725   
 211:1398    212:1998    213:1723    214:730     215:72      216:4943   
 217:1638    218:546     219:363     220:1204    221:490     222:316    
 223:150    

End of report




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