Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Nov 4 14:17:41 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 <pfsinoz at gmail.com>.

Routing Table Report   04:00 +10GMT Sat 05 Nov, 2011

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

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

BGP routing table entries examined:                              380959
    Prefixes after maximum aggregation:                          166564
    Deaggregation factor:                                          2.29
    Unique aggregates announced to Internet:                     187114
Total ASes present in the Internet Routing Table:                 39222
    Prefixes per ASN:                                              9.71
Origin-only ASes present in the Internet Routing Table:           32367
Origin ASes announcing only one prefix:                           15483
Transit ASes present in the Internet Routing Table:                5264
Transit-only ASes present in the Internet Routing Table:            133
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:              1628
    Unregistered ASNs in the Routing Table:                         862
Number of 32-bit ASNs allocated by the RIRs:                       1925
Number of 32-bit ASNs visible in the Routing Table:                1591
Prefixes from 32-bit ASNs in the Routing Table:                    3686
Special use prefixes present in the Routing Table:                    3
Prefixes being announced from unallocated address space:             86
Number of addresses announced to Internet:                   2489977408
    Equivalent to 148 /8s, 106 /16s and 10 /24s
    Percentage of available address space announced:               67.2
    Percentage of allocated address space announced:               67.2
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               91.6
Total number of prefixes smaller than registry allocations:      160771

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

Prefixes being announced by APNIC Region ASes:                    94863
    Total APNIC prefixes after maximum aggregation:               31059
    APNIC Deaggregation factor:                                    3.05
Prefixes being announced from the APNIC address blocks:           91315
    Unique aggregates announced from the APNIC address blocks:    38279
APNIC Region origin ASes present in the Internet Routing Table:    4595
    APNIC Prefixes per ASN:                                       19.87
APNIC Region origin ASes announcing only one prefix:               1270
APNIC Region transit ASes present in the Internet Routing Table:    716
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         21
Number of APNIC region 32-bit ASNs visible in the Routing Table:    101
Number of APNIC addresses announced to Internet:              629651296
    Equivalent to 37 /8s, 135 /16s and 183 /24s
    Percentage of available APNIC address space announced:         79.9

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:                    145925
    Total ARIN prefixes after maximum aggregation:                74475
    ARIN Deaggregation factor:                                     1.96
Prefixes being announced from the ARIN address blocks:           117809
    Unique aggregates announced from the ARIN address blocks:     48321
ARIN Region origin ASes present in the Internet Routing Table:    14739
    ARIN Prefixes per ASN:                                         7.99
ARIN Region origin ASes announcing only one prefix:                5639
ARIN Region transit ASes present in the Internet Routing Table:    1559
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:               804645888
    Equivalent to 47 /8s, 245 /16s and 236 /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:                     91828
    Total RIPE prefixes after maximum aggregation:                51035
    RIPE Deaggregation factor:                                     1.80
Prefixes being announced from the RIPE address blocks:            84299
    Unique aggregates announced from the RIPE address blocks:     54500
RIPE Region origin ASes present in the Internet Routing Table:    16084
    RIPE Prefixes per ASN:                                         5.24
RIPE Region origin ASes announcing only one prefix:                7968
RIPE Region transit ASes present in the Internet Routing Table:    2531
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:    1108
Number of RIPE addresses announced to Internet:               491707840
    Equivalent to 29 /8s, 78 /16s and 221 /24s
    Percentage of available RIPE address space announced:          79.2

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:                   35936
    Total LACNIC prefixes after maximum aggregation:               7912
    LACNIC Deaggregation factor:                                   4.54
Prefixes being announced from the LACNIC address blocks:          35352
    Unique aggregates announced from the LACNIC address blocks:   18553
LACNIC Region origin ASes present in the Internet Routing Table:   1545
    LACNIC Prefixes per ASN:                                      22.88
LACNIC Region origin ASes announcing only one prefix:               446
LACNIC Region transit ASes present in the Internet Routing Table:   281
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:   366
Number of LACNIC addresses announced to Internet:              92827520
    Equivalent to 5 /8s, 136 /16s and 111 /24s
    Percentage of available LACNIC address space announced:        61.5

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:                   8537
    Total AfriNIC prefixes after maximum aggregation:              2007
    AfriNIC Deaggregation factor:                                  4.25
Prefixes being announced from the AfriNIC address blocks:          6608
    Unique aggregates announced from the AfriNIC address blocks:   1974
AfriNIC Region origin ASes present in the Internet Routing Table:   491
    AfriNIC Prefixes per ASN:                                     13.46
AfriNIC Region origin ASes announcing only one prefix:              160
AfriNIC Region transit ASes present in the Internet Routing Table:  108
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:             27570432
    Equivalent to 1 /8s, 164 /16s and 177 /24s
    Percentage of available AfriNIC address space announced:       41.1

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     2514      11129         974   Korea Telecom (KIX)
17974     1630        511          36   PT TELEKOMUNIKASI INDONESIA
 7545     1614        303          87   TPG Internet Pty Ltd
 4755     1548        637         174   TATA Communications formerly 
 7552     1394       1064           7   Vietel Corporation
 9829     1166        989          28   BSNL National Internet Backbo
 9583     1092         80         500   Sify Limited
 4808     1090       2103         312   CNCGROUP IP network: China169
24560      964        343         218   Bharti Airtel Ltd., Telemedia
18101      954        135         150   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     3547       3814         223   bellsouth.net, inc. 
 7029     2337       1016         198   Windstream Communications Inc
18566     2094        383         177   Covad Communications 
 1785     1844        680         122   PaeTec Communications, Inc.
 4323     1623       1078         389   Time Warner Telecom
20115     1596       1547         621   Charter Communications 
22773     1462       2907         100   Cox Communications, Inc.
30036     1402        254         671   Mediacom Communications Corp 
19262     1395       4728         400   Verizon Global Networks 
 7018     1317       7045         862   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     1449        416          14   Corbina telecom
 6830      650       1927         414   UPC Distribution Services
34984      596        110         184   BILISIM TELEKOM
12479      545        628          51   Uni2 Autonomous System
20940      542        179         425   Akamai Technologies European 
 3320      507       8169         387   Deutsche Telekom AG
 3292      481       2074         406   TDC Tele Danmark
 8866      461        133          26   Bulgarian Telecommunication C
31148      406         22         114   FreeNet ISP
 8551      402        354          43   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     1699        314         156   TVCABLE BOGOTA 
28573     1479       1043          79   NET Servicos de Comunicao S.A
 8151     1430       2937         346   UniNet S.A. de C.V. 
 7303     1236        751         171   Telecom Argentina Stet-France
27947      591         72          84   Telconet S.A
22047      580        322          17   VTR PUNTO NET S.A. 
 6503      565        434          68   AVANTEL, S.A. 
 7738      553       1050          31   Telecomunicacoes da Bahia S.A
 3816      537        233          95   Empresa Nacional de Telecomun
11172      524         85          95   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      801        146          36   LINKdotNET AS number
 8452      652        446          12   TEDATA
15475      443         74           8   Nile Online
36992      285        415          21   Etisalat MISR
 3741      281        939         230   The Internet Solution 
15706      240         32           6   Sudatel Internet Exchange Aut
33776      239         13           8   Starcomms Nigeria Limited
 6713      235        519          14   Itissalat Al-MAGHRIB
29571      218         17          13   Ci Telecom Autonomous system 
12258      196         28          57   Vodacom Internet Company 

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     3547       3814         223   bellsouth.net, inc. 
 4766     2514      11129         974   Korea Telecom (KIX)
 7029     2337       1016         198   Windstream Communications Inc
18566     2094        383         177   Covad Communications 
 1785     1844        680         122   PaeTec Communications, Inc.
10620     1699        314         156   TVCABLE BOGOTA 
17974     1630        511          36   PT TELEKOMUNIKASI INDONESIA
 4323     1623       1078         389   Time Warner Telecom
 7545     1614        303          87   TPG Internet Pty Ltd
20115     1596       1547         621   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
 7029      2337        2139      Windstream Communications Inc
18566      2094        1917      Covad Communications 
 1785      1844        1722      PaeTec Communications, Inc.
17974      1630        1594      PT TELEKOMUNIKASI INDONESIA
10620      1699        1543      TVCABLE BOGOTA 
 4766      2514        1540      Korea Telecom (KIX)
 7545      1614        1527      TPG Internet Pty Ltd
 8402      1449        1435      Corbina telecom
28573      1479        1400      NET Servicos de Comunicao S.A
 7552      1394        1387      Vietel Corporation

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
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
17300   UNALLOCATED  12.45.103.0/24        7018       AT&T WorldNet Servic
17300   UNALLOCATED  12.45.110.0/24         701       UUNET Technologies, 
16476   UNALLOCATED  12.46.27.0/24         7018       AT&T WorldNet Servic
32873   UNALLOCATED  12.46.100.0/23       10912       InterNAP Network Ser

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

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix             Origin AS  Description
128.0.0.0/21         12654     RIPE NCC RIS Project
128.0.0.0/16         12654     RIPE NCC RIS Project
128.0.24.0/24        12654     RIPE NCC RIS Project

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

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      /12:236     
/13:465     /14:809     /15:1422    /16:12027   /17:6052    /18:10085   
/19:19946   /20:27559   /21:27705   /22:37171   /23:35262   /24:198635  
/25:1153    /26:1357    /27:761     /28:166     /29:4       /30:0       
/31:0       /32:5       

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

  ASN   No of nets  Total ann.   Description
 6389     2187          3547      bellsouth.net, inc. 
18566     2043          2094      Covad Communications 
 7029     2005          2337      Windstream Communications Inc
10620     1594          1699      TVCABLE BOGOTA 
 8402     1424          1449      Corbina telecom
30036     1363          1402      Mediacom Communications Corp 
11492     1117          1155      Cable One 
 1785     1057          1844      PaeTec Communications, Inc.
 7011     1051          1169      Citizens Utilities 
22773      950          1462      Cox Communications, Inc.

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

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

   1:416       2:476       4:15        5:1         6:3         8:361    
  12:1955     13:1        14:541      15:11       16:3        17:7      
  20:9        23:58       24:1682     27:1024     31:673      32:65     
  33:2        34:2        36:4        38:758      40:110      41:2691   
  42:55       44:3        46:1025     47:3        49:299      50:443    
  52:13       55:6        56:2        57:47       58:902      59:497    
  60:361      61:1115     62:1086     63:1966     64:4057     65:2302   
  66:4278     67:2003     68:1163     69:3184     70:882      71:384    
  72:1802     74:2608     75:388      76:316      77:963      78:874    
  79:480      80:1131     81:844      82:520      83:528      84:619    
  85:1153     86:398      87:976      88:356      89:1593     90:235    
  91:4255     92:535      93:1536     94:1300     95:1088     96:428    
  97:286      98:936      99:37      101:225     103:432     106:70     
 107:84      108:72      109:1155    110:661     111:797     112:341    
 113:486     114:620     115:715     116:882     117:723     118:877    
 119:1265    120:344     121:695     122:1572    123:1007    124:1352   
 125:1355    128:245     129:189     130:164     131:627     132:148    
 133:21      134:221     135:54      136:212     137:142     138:286    
 139:122     140:489     141:317     142:389     143:410     144:491    
 145:64      146:465     147:220     148:641     149:267     150:169    
 151:194     152:447     153:178     154:7       155:385     156:208    
 157:361     158:155     159:485     160:333     161:214     162:371    
 163:173     164:511     165:369     166:540     167:439     168:820    
 169:145     170:880     171:86      172:4       173:1708    174:679    
 175:417     176:278     177:369     178:1082    180:1139    181:38     
 182:653     183:221     184:387     185:1       186:1328    187:764    
 188:1061    189:1147    190:5167    192:5931    193:5050    194:3558   
 195:3112    196:1265    197:167     198:3629    199:4175    200:5513   
 201:1695    202:8573    203:8478    204:4315    205:2370    206:2674   
 207:2820    208:4037    209:3580    210:2720    211:1457    212:2083   
 213:1780    214:813     215:95      216:4918    217:1603    218:564    
 219:342     220:1254    221:517     222:322     223:269    

End of report



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