Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Jun 10 19:02:38 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 11 Jun, 2011

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

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

BGP routing table entries examined:                              359107
    Prefixes after maximum aggregation:                          162630
    Deaggregation factor:                                          2.21
    Unique aggregates announced to Internet:                     178253
Total ASes present in the Internet Routing Table:                 37831
    Prefixes per ASN:                                              9.49
Origin-only ASes present in the Internet Routing Table:           31580
Origin ASes announcing only one prefix:                           15168
Transit ASes present in the Internet Routing Table:                5113
Transit-only ASes present in the Internet Routing Table:            135
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      33
    Max AS path prepend of ASN (48687)                               24
Prefixes from unregistered ASNs in the Routing Table:               783
    Unregistered ASNs in the Routing Table:                         419
Number of 32-bit ASNs allocated by the RIRs:                       1446
Number of 32-bit ASNs visible in the Routing Table:                1138
Prefixes from 32-bit ASNs in the Routing Table:                    2602
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            164
Number of addresses announced to Internet:                   2487684608
    Equivalent to 148 /8s, 71 /16s and 14 /24s
    Percentage of available address space announced:               67.1
    Percentage of allocated address space announced:               67.1
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               91.1
Total number of prefixes smaller than registry allocations:      149733

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

Prefixes being announced by APNIC Region ASes:                    88931
    Total APNIC prefixes after maximum aggregation:               29983
    APNIC Deaggregation factor:                                    2.97
Prefixes being announced from the APNIC address blocks:           85430
    Unique aggregates announced from the APNIC address blocks:    36696
APNIC Region origin ASes present in the Internet Routing Table:    4477
    APNIC Prefixes per ASN:                                       19.08
APNIC Region origin ASes announcing only one prefix:               1251
APNIC Region transit ASes present in the Internet Routing Table:    703
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         18
Number of APNIC region 32-bit ASNs visible in the Routing Table:     46
Number of APNIC addresses announced to Internet:              620146464
    Equivalent to 36 /8s, 246 /16s and 175 /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:                    140907
    Total ARIN prefixes after maximum aggregation:                71613
    ARIN Deaggregation factor:                                     1.97
Prefixes being announced from the ARIN address blocks:           112819
    Unique aggregates announced from the ARIN address blocks:     46088
ARIN Region origin ASes present in the Internet Routing Table:    14426
    ARIN Prefixes per ASN:                                         7.82
ARIN Region origin ASes announcing only one prefix:                5503
ARIN Region transit ASes present in the Internet Routing Table:    1517
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:               818671872
    Equivalent to 48 /8s, 203 /16s and 241 /24s
    Percentage of available ARIN address space announced:          65.1

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,  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:                     85501
    Total RIPE prefixes after maximum aggregation:                48681
    RIPE Deaggregation factor:                                     1.76
Prefixes being announced from the RIPE address blocks:            78946
    Unique aggregates announced from the RIPE address blocks:     52214
RIPE Region origin ASes present in the Internet Routing Table:    15695
    RIPE Prefixes per ASN:                                         5.03
RIPE Region origin ASes announcing only one prefix:                7840
RIPE Region transit ASes present in the Internet Routing Table:    2472
Average RIPE Region AS path length visible:                         4.6
    Max RIPE Region AS path length visible:                          33
Number of RIPE region 32-bit ASNs visible in the Routing Table:     847
Number of RIPE addresses announced to Internet:               477055488
    Equivalent to 28 /8s, 111 /16s and 74 /24s
    Percentage of available RIPE address space announced:          76.9

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:                   32899
    Total LACNIC prefixes after maximum aggregation:               7498
    LACNIC Deaggregation factor:                                   4.39
Prefixes being announced from the LACNIC address blocks:          31955
    Unique aggregates announced from the LACNIC address blocks:   16895
LACNIC Region origin ASes present in the Internet Routing Table:   1451
    LACNIC Prefixes per ASN:                                      22.02
LACNIC Region origin ASes announcing only one prefix:               433
LACNIC Region transit ASes present in the Internet Routing Table:   253
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:   228
Number of LACNIC addresses announced to Internet:              84687104
    Equivalent to 5 /8s, 12 /16s and 57 /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:                   8043
    Total AfriNIC prefixes after maximum aggregation:              1920
    AfriNIC Deaggregation factor:                                  4.19
Prefixes being announced from the AfriNIC address blocks:          6357
    Unique aggregates announced from the AfriNIC address blocks:   1904
AfriNIC Region origin ASes present in the Internet Routing Table:   460
    AfriNIC Prefixes per ASN:                                     13.82
AfriNIC Region origin ASes announcing only one prefix:              141
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:             24155648
    Equivalent to 1 /8s, 112 /16s and 150 /24s
    Percentage of available AfriNIC address space announced:       36.0

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     2462       9500         924   Korea Telecom (KIX)
17974     1561        441          38   PT TELEKOMUNIKASI INDONESIA
 7545     1539        301          86   TPG Internet Pty Ltd
 4755     1471        634         166   TATA Communications formerly 
24560     1152        336         187   Bharti Airtel Ltd., Telemedia
 7552     1146       1064           7   Vietel Corporation
 9583     1071         79         500   Sify Limited
 4808     1052       2098         299   CNCGROUP IP network: China169
 9829     1029        870          67   BSNL National Internet Backbo
17488      946        191         102   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     3628       3822         252   bellsouth.net, inc. 
 4323     1963       1097         401   Time Warner Telecom
18566     1913        365         237   Covad Communications 
 1785     1791        681         122   PaeTec Communications, Inc.
 6478     1721        319          45   AT&T Worldnet Services 
20115     1539       1541         633   Charter Communications 
19262     1490       4932         314   Verizon Global Networks 
 7018     1364       7052         891   AT&T WorldNet Services
22773     1340       2897          87   Cox Communications, Inc.
 2386     1271        536         912   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
34984      521        106         180   BILISIM TELEKOM
 6830      513       1780         320   UPC Distribution Services
 3292      464       2078         399   TDC Tele Danmark
20940      462        135         354   Akamai Technologies European 
29049      451         33          48   AzerSat LLC.
 8866      445        134          26   Bulgarian Telecommunication C
12479      436        593           7   Uni2 Autonomous System
 3320      425       8152         370   Deutsche Telekom AG
 8551      406        355          45   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     1513        278         157   TVCABLE BOGOTA 
28573     1321        992          80   NET Servicos de Comunicao S.A
 8151     1268       2727         364   UniNet S.A. de C.V. 
 7303      990        506         170   Telecom Argentina Stet-France
 6503      739        354          73   AVANTEL, S.A. 
14420      677         54          80   CORPORACION NACIONAL DE TELEC
22047      564        310          15   VTR PUNTO NET S.A. 
 3816      528        231          94   Empresa Nacional de Telecomun
 7738      516        986          31   Telecomunicacoes da Bahia S.A
13489      516        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      797        445          11   TEDATA
24863      795        147          37   LINKdotNET AS number
15475      527         74           8   Nile Online
36992      308        415          18   Etisalat MISR
 3741      264        937         225   The Internet Solution 
 6713      241        215          13   Itissalat Al-MAGHRIB
24835      210         78          10   RAYA Telecom - Egypt
33776      200         12          11   Starcomms Nigeria Limited
29571      192         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     3628       3822         252   bellsouth.net, inc. 
23456     2602        639        1421   32-bit ASN transition
 4766     2462       9500         924   Korea Telecom (KIX)
 4323     1963       1097         401   Time Warner Telecom
18566     1913        365         237   Covad Communications 
 1785     1791        681         122   PaeTec Communications, Inc.
 6478     1721        319          45   AT&T Worldnet Services 
17974     1561        441          38   PT TELEKOMUNIKASI INDONESIA
 7545     1539        301          86   TPG Internet Pty Ltd
20115     1539       1541         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
18566      1913        1676      Covad Communications 
 6478      1721        1676      AT&T Worldnet Services 
 1785      1791        1669      PaeTec Communications, Inc.
 4323      1963        1562      Time Warner Telecom
 4766      2462        1538      Korea Telecom (KIX)
17974      1561        1523      PT TELEKOMUNIKASI INDONESIA
 7545      1539        1453      TPG Internet Pty Ltd
10620      1513        1356      TVCABLE BOGOTA 
 4755      1471        1305      TATA Communications formerly 
22773      1340        1253      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.
31.131.192.0/19      42368     RIPE Network Coordination Cen
41.190.32.0/23       31856     CABSAS
41.190.34.0/23       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        /8:22       /9:12      /10:28      /11:80      /12:230     
/13:462     /14:800     /15:1394    /16:11946   /17:5847    /18:9787    
/19:19372   /20:25829   /21:26021   /22:34187   /23:33194   /24:186895  
/25:1055    /26:1225    /27:663     /28:41      /29:9       /30:2       
/31:0       /32:6       

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

  ASN   No of nets  Total ann.   Description
 6389     2233          3628      bellsouth.net, inc. 
18566     1870          1913      Covad Communications 
 6478     1675          1721      AT&T Worldnet Services 
10620     1403          1513      TVCABLE BOGOTA 
23456     1290          2602      32-bit ASN transition
11492     1092          1138      Cable One 
 7011     1061          1161      Citizens Utilities 
 1785     1050          1791      PaeTec Communications, Inc.
 7029      909          1159      Alltel Information Services, 
 4323      875          1963      Time Warner Telecom

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

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

   1:285       2:48        4:16        5:1         6:3         8:338    
  12:1977     13:1        14:461      15:15       16:3        17:8      
  20:10       23:11       24:1611     27:772      31:429      32:60     
  33:4        34:2        37:1        38:737      40:103      41:2515   
  42:2        44:3        46:957      47:3        49:187      50:405    
  52:13       54:2        55:4        56:2        57:29       58:841    
  59:475      60:387      61:1122     62:1053     63:1935     64:3939   
  65:2254     66:4138     67:1884     68:1086     69:3003     70:705    
  71:373      72:1846     74:2354     75:309      76:340      77:881    
  78:706      79:457      80:1106     81:832      82:493      83:457    
  84:666      85:1080     86:581      87:751      88:330      89:1529   
  90:204      91:3839     92:526      93:1037     94:1292     95:825    
  96:444      97:251      98:871      99:36      101:68      103:56     
 106:6       107:11      108:83      109:973     110:601     111:710    
 112:299     113:399     114:537     115:687     116:959     117:675    
 118:793     119:1142    120:313     121:669     122:1627    123:950    
 124:1274    125:1217    128:261     129:175     130:164     131:577    
 132:110     133:19      134:214     135:48      136:214     137:144    
 138:300     139:112     140:469     141:238     142:404     143:417    
 144:495     145:54      146:448     147:214     148:606     149:247    
 150:172     151:187     152:330     153:180     154:3       155:399    
 156:195     157:352     158:138     159:380     160:318     161:208    
 162:309     163:165     164:500     165:352     166:530     167:424    
 168:729     169:155     170:832     171:77      172:1       173:1605   
 174:584     175:371     176:133     177:135     178:1003    180:886    
 181:18      182:466     183:216     184:297     185:1       186:1188   
 187:753     188:848     189:910     190:4890    192:5841    193:4918   
 194:3497    195:3003    196:1231    197:20      198:3585    199:3927   
 200:5498    201:1480    202:8316    203:8357    204:4187    205:2339   
 206:2679    207:2826    208:3946    209:3471    210:2713    211:1400   
 212:2008    213:1727    214:742     215:68      216:4923    217:1638   
 218:548     219:364     220:1205    221:490     222:317     223:156    


End of report




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