Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Sep 30 14:39:20 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 <pfsinoz at gmail.com>.

Routing Table Report   04:00 +10GMT Sat 01 Oct, 2011

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

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

BGP routing table entries examined:                              374848
    Prefixes after maximum aggregation:                          168719
    Deaggregation factor:                                          2.22
    Unique aggregates announced to Internet:                     185153
Total ASes present in the Internet Routing Table:                 38930
    Prefixes per ASN:                                              9.63
Origin-only ASes present in the Internet Routing Table:           32252
Origin ASes announcing only one prefix:                           15477
Transit ASes present in the Internet Routing Table:                5218
Transit-only ASes present in the Internet Routing Table:            137
Average AS path length visible in the Internet Routing Table:       4.4
    Max AS path length visible:                                      33
    Max AS path prepend of ASN (48687)                               24
Prefixes from unregistered ASNs in the Routing Table:              1474
    Unregistered ASNs in the Routing Table:                         802
Number of 32-bit ASNs allocated by the RIRs:                       1802
Number of 32-bit ASNs visible in the Routing Table:                1460
Prefixes from 32-bit ASNs in the Routing Table:                    3347
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            103
Number of addresses announced to Internet:                   2481536768
    Equivalent to 147 /8s, 233 /16s and 63 /24s
    Percentage of available address space announced:               67.0
    Percentage of allocated address space announced:               67.0
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               91.4
Total number of prefixes smaller than registry allocations:      156962

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

Prefixes being announced by APNIC Region ASes:                    93945
    Total APNIC prefixes after maximum aggregation:               30799
    APNIC Deaggregation factor:                                    3.05
Prefixes being announced from the APNIC address blocks:           90409
    Unique aggregates announced from the APNIC address blocks:    37945
APNIC Region origin ASes present in the Internet Routing Table:    4567
    APNIC Prefixes per ASN:                                       19.80
APNIC Region origin ASes announcing only one prefix:               1260
APNIC Region transit ASes present in the Internet Routing Table:    707
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         19
Number of APNIC region 32-bit ASNs visible in the Routing Table:     90
Number of APNIC addresses announced to Internet:              628377696
    Equivalent to 37 /8s, 116 /16s and 72 /24s
    Percentage of available APNIC address space announced:         79.7

APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079, 55296-56319,
                       58368-59391, 131072-132095, 132096-133119
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:                    143988
    Total ARIN prefixes after maximum aggregation:                73994
    ARIN Deaggregation factor:                                     1.95
Prefixes being announced from the ARIN address blocks:           116124
    Unique aggregates announced from the ARIN address blocks:     47994
ARIN Region origin ASes present in the Internet Routing Table:    14694
    ARIN Prefixes per ASN:                                         7.90
ARIN Region origin ASes announcing only one prefix:                5653
ARIN Region transit ASes present in the Internet Routing Table:    1557
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          25
Number of ARIN region 32-bit ASNs visible in the Routing Table:      12
Number of ARIN addresses announced to Internet:               804495360
    Equivalent to 47 /8s, 243 /16s and 160 /24s
    Percentage of available ARIN address space announced:          63.9

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:                     89839
    Total RIPE prefixes after maximum aggregation:                50430
    RIPE Deaggregation factor:                                     1.78
Prefixes being announced from the RIPE address blocks:            82551
    Unique aggregates announced from the RIPE address blocks:     54098
RIPE Region origin ASes present in the Internet Routing Table:    16005
    RIPE Prefixes per ASN:                                         5.16
RIPE Region origin ASes announcing only one prefix:                7962
RIPE Region transit ASes present in the Internet Routing Table:    2506
Average RIPE Region AS path length visible:                         4.7
    Max RIPE Region AS path length visible:                          33
Number of RIPE region 32-bit ASNs visible in the Routing Table:    1032
Number of RIPE addresses announced to Internet:               490070912
    Equivalent to 29 /8s, 53 /16s and 227 /24s
    Percentage of available RIPE address space announced:          78.9

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:                   35011
    Total LACNIC prefixes after maximum aggregation:               7797
    LACNIC Deaggregation factor:                                   4.49
Prefixes being announced from the LACNIC address blocks:          34336
    Unique aggregates announced from the LACNIC address blocks:   18003
LACNIC Region origin ASes present in the Internet Routing Table:   1530
    LACNIC Prefixes per ASN:                                      22.44
LACNIC Region origin ASes announcing only one prefix:               449
LACNIC Region transit ASes present in the Internet Routing Table:   279
Average LACNIC Region AS path length visible:                       4.5
    Max LACNIC Region AS path length visible:                        19
Number of LACNIC region 32-bit ASNs visible in the Routing Table:   322
Number of LACNIC addresses announced to Internet:              89805184
    Equivalent to 5 /8s, 90 /16s and 81 /24s
    Percentage of available LACNIC address space announced:        59.5

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:                   8547
    Total AfriNIC prefixes after maximum aggregation:              2002
    AfriNIC Deaggregation factor:                                  4.27
Prefixes being announced from the AfriNIC address blocks:          6606
    Unique aggregates announced from the AfriNIC address blocks:   1963
AfriNIC Region origin ASes present in the Internet Routing Table:   488
    AfriNIC Prefixes per ASN:                                     13.54
AfriNIC Region origin ASes announcing only one prefix:              153
AfriNIC Region transit ASes present in the Internet Routing Table:  103
Average AfriNIC Region AS path length visible:                      4.6
    Max AfriNIC Region AS path length visible:                       25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:    4
Number of AfriNIC addresses announced to Internet:             27644160
    Equivalent to 1 /8s, 165 /16s and 209 /24s
    Percentage of available AfriNIC address space announced:       41.2

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     2509      11048         962   Korea Telecom (KIX)
17974     1986        519          33   PT TELEKOMUNIKASI INDONESIA
 7545     1607        303          86   TPG Internet Pty Ltd
 4755     1546        638         176   TATA Communications formerly 
24560     1184        346         195   Bharti Airtel Ltd., Telemedia
 9829     1158        989          28   BSNL National Internet Backbo
 7552     1105       1064           7   Vietel Corporation
 9583     1086         80         502   Sify Limited
 4808     1074       2096         303   CNCGROUP IP network: China169
18101      952        165         142   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     3557       3817         225   bellsouth.net, inc. 
18566     1915        366         239   Covad Communications 
 1785     1829        680         124   PaeTec Communications, Inc.
 7029     1720       1008         194   Windstream Communications Inc
 4323     1625       1082         391   Time Warner Telecom
20115     1595       1542         635   Charter Communications 
22773     1456       2907         100   Cox Communications, Inc.
19262     1395       4728         400   Verizon Global Networks 
30036     1390        252         666   Mediacom Communications Corp 
 7018     1338       7051         874   AT&T WorldNet Services

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
 8402     1224        352          13   Corbina telecom
34984      577        108         180   BILISIM TELEKOM
 6830      557       1873         333   UPC Distribution Services
20940      530        178         408   Akamai Technologies European 
 3320      501       8169         383   Deutsche Telekom AG
 3292      479       2082         408   TDC Tele Danmark
12479      474        593           7   Uni2 Autonomous System
 8866      459        133          26   Bulgarian Telecommunication C
29049      423         31          55   AzerSat LLC.
 8551      404        354          44   Bezeq International

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     1681        310         155   TVCABLE BOGOTA 
 8151     1410       2823         344   UniNet S.A. de C.V. 
28573     1368       1013          70   NET Servicos de Comunicao S.A
 7303     1164        683         175   Telecom Argentina Stet-France
14420      742         58          87   CORPORACION NACIONAL DE TELEC
22047      581        322          17   VTR PUNTO NET S.A. 
 6503      577        450          69   AVANTEL, S.A. 
27947      573         71          83   Telconet S.A
 3816      536        232          98   Empresa Nacional de Telecomun
11172      521         85          93   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
24863      813        147          37   LINKdotNET AS number
 8452      663        445          11   TEDATA
15475      449         74           8   Nile Online
36992      293        415          14   Etisalat MISR
 3741      278        939         231   The Internet Solution 
15706      244         32           6   Sudatel Internet Exchange Aut
 6713      242        519          14   Itissalat Al-MAGHRIB
33776      239         13           8   Starcomms Nigeria Limited
12258      198         28          58   Vodacom Internet Company 
29571      192         17          11   Ci Telecom Autonomous system 

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     3557       3817         225   bellsouth.net, inc. 
 4766     2509      11048         962   Korea Telecom (KIX)
17974     1986        519          33   PT TELEKOMUNIKASI INDONESIA
18566     1915        366         239   Covad Communications 
 1785     1829        680         124   PaeTec Communications, Inc.
 7029     1720       1008         194   Windstream Communications Inc
10620     1681        310         155   TVCABLE BOGOTA 
 4323     1625       1082         391   Time Warner Telecom
 7545     1607        303          86   TPG Internet Pty Ltd
20115     1595       1542         635   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      1986        1953      PT TELEKOMUNIKASI INDONESIA
 1785      1829        1705      PaeTec Communications, Inc.
18566      1915        1676      Covad Communications 
 4766      2509        1547      Korea Telecom (KIX)
 7029      1720        1526      Windstream Communications Inc
10620      1681        1526      TVCABLE BOGOTA 
 7545      1607        1521      TPG Internet Pty Ltd
 4755      1546        1370      TATA Communications formerly 
22773      1456        1356      Cox Communications, Inc.
28573      1368        1298      NET Servicos de Comunicao S.A

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
41.222.79.0/24       36938     >>UNKNOWN<<
41.223.92.0/22       36936     >>UNKNOWN<<
62.61.220.0/24       24974     Tachyon Europe BV - Wireless 
62.61.221.0/24       24974     Tachyon Europe BV - Wireless 

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       /9:12      /10:27      /11:81      /12:235     
/13:463     /14:802     /15:1420    /16:11981   /17:5988    /18:10044   
/19:19827   /20:26999   /21:27144   /22:36733   /23:34891   /24:194773  
/25:1132    /26:1345    /27:752     /28:171     /29:4       /30:0       
/31:0       /32:5       

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

  ASN   No of nets  Total ann.   Description
 6389     2194          3557      bellsouth.net, inc. 
18566     1870          1915      Covad Communications 
10620     1576          1681      TVCABLE BOGOTA 
 7029     1417          1720      Windstream Communications Inc
30036     1351          1390      Mediacom Communications Corp 
 8402     1185          1224      Corbina telecom
11492     1115          1153      Cable One 
 1785     1054          1829      PaeTec Communications, Inc.
 7011     1052          1173      Citizens Utilities 
22773      945          1456      Cox Communications, Inc.

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

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

   1:381       2:393       4:15        5:1         6:3         8:353    
  12:1956     13:1        14:532      15:13       16:3        17:7      
  20:10       23:36       24:1688     27:959      31:564      32:65     
  33:4        34:2        36:4        38:746      40:108      41:2639   
  42:48       44:3        46:993      47:3        49:263      50:432    
  52:13       55:3        56:2        57:38       58:879      59:492    
  60:365      61:1178     62:1089     63:1935     64:4052     65:2306   
  66:3979     67:1952     68:1102     69:3194     70:814      71:377    
  72:1849     74:2458     75:350      76:341      77:883      78:829    
  79:480      80:1122     81:835      82:503      83:501      84:622    
  85:1118     86:408      87:876      88:352      89:1591     90:268    
  91:4143     92:535      93:1339     94:1318     95:964      96:440    
  97:277      98:905      99:37      101:209     103:331     106:70     
 107:56      108:47      109:1034    110:663     111:796     112:322    
 113:449     114:569     115:681     116:870     117:689     118:866    
 119:1208    120:334     121:678     122:1605    123:1013    124:1353   
 125:1393    128:244     129:178     130:163     131:580     132:112    
 133:21      134:214     135:54      136:213     137:139     138:288    
 139:122     140:494     141:292     142:388     143:416     144:482    
 145:63      146:471     147:215     148:641     149:264     150:155    
 151:193     152:446     153:177     154:6       155:385     156:207    
 157:361     158:150     159:465     160:322     161:206     162:336    
 163:178     164:511     165:374     166:536     167:432     168:739    
 169:147     170:865     171:85      172:1       173:1641    174:648    
 175:417     176:246     177:291     178:1031    180:1090    181:37     
 182:627     183:215     184:355     185:1       186:1493    187:676    
 188:923     189:826     190:5177    192:5916    193:5011    194:3528   
 195:3078    196:1257    197:174     198:3626    199:4140    200:5520   
 201:1641    202:8580    203:8492    204:4258    205:2357    206:2676   
 207:2824    208:4041    209:3464    210:2696    211:1463    212:2044   
 213:1776    214:785     215:90      216:4897    217:1594    218:561    
 219:338     220:1227    221:514     222:342     223:263    

End of report



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