Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Jun 17 13:47:37 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 18 Jun, 2011

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

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

BGP routing table entries examined:                              360387
    Prefixes after maximum aggregation:                          163564
    Deaggregation factor:                                          2.20
    Unique aggregates announced to Internet:                     178868
Total ASes present in the Internet Routing Table:                 37921
    Prefixes per ASN:                                              9.50
Origin-only ASes present in the Internet Routing Table:           31627
Origin ASes announcing only one prefix:                           15197
Transit ASes present in the Internet Routing Table:                5136
Transit-only ASes present in the Internet Routing Table:            131
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:               818
    Unregistered ASNs in the Routing Table:                         441
Number of 32-bit ASNs allocated by the RIRs:                       1463
Number of 32-bit ASNs visible in the Routing Table:                1158
Prefixes from 32-bit ASNs in the Routing Table:                    2676
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            141
Number of addresses announced to Internet:                   2488807488
    Equivalent to 148 /8s, 88 /16s and 48 /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:               91.0
Total number of prefixes smaller than registry allocations:      150087

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

Prefixes being announced by APNIC Region ASes:                    89629
    Total APNIC prefixes after maximum aggregation:               30149
    APNIC Deaggregation factor:                                    2.97
Prefixes being announced from the APNIC address blocks:           86121
    Unique aggregates announced from the APNIC address blocks:    36875
APNIC Region origin ASes present in the Internet Routing Table:    4482
    APNIC Prefixes per ASN:                                       19.21
APNIC Region origin ASes announcing only one prefix:               1246
APNIC Region transit ASes present in the Internet Routing Table:    706
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:              620285216
    Equivalent to 36 /8s, 248 /16s and 205 /24s
    Percentage of available APNIC address space announced:         78.7

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:                    140967
    Total ARIN prefixes after maximum aggregation:                72104
    ARIN Deaggregation factor:                                     1.96
Prefixes being announced from the ARIN address blocks:           112897
    Unique aggregates announced from the ARIN address blocks:     46236
ARIN Region origin ASes present in the Internet Routing Table:    14446
    ARIN Prefixes per ASN:                                         7.82
ARIN Region origin ASes announcing only one prefix:                5520
ARIN Region transit ASes present in the Internet Routing Table:    1524
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          24
Number of ARIN region 32-bit ASNs visible in the Routing Table:      12
Number of ARIN addresses announced to Internet:               818669312
    Equivalent to 48 /8s, 203 /16s and 231 /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:                     85734
    Total RIPE prefixes after maximum aggregation:                48818
    RIPE Deaggregation factor:                                     1.76
Prefixes being announced from the RIPE address blocks:            79180
    Unique aggregates announced from the RIPE address blocks:     52437
RIPE Region origin ASes present in the Internet Routing Table:    15722
    RIPE Prefixes per ASN:                                         5.04
RIPE Region origin ASes announcing only one prefix:                7850
RIPE Region transit ASes present in the Internet Routing Table:    2477
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:     855
Number of RIPE addresses announced to Internet:               477374720
    Equivalent to 28 /8s, 116 /16s and 41 /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:                   33067
    Total LACNIC prefixes after maximum aggregation:               7539
    LACNIC Deaggregation factor:                                   4.39
Prefixes being announced from the LACNIC address blocks:          32170
    Unique aggregates announced from the LACNIC address blocks:   16905
LACNIC Region origin ASes present in the Internet Routing Table:   1468
    LACNIC Prefixes per ASN:                                      21.91
LACNIC Region origin ASes announcing only one prefix:               438
LACNIC Region transit ASes present in the Internet Routing Table:   262
Average LACNIC Region AS path length visible:                       4.4
    Max LACNIC Region AS path length visible:                        21
Number of LACNIC region 32-bit ASNs visible in the Routing Table:   241
Number of LACNIC addresses announced to Internet:              84924928
    Equivalent to 5 /8s, 15 /16s and 218 /24s
    Percentage of available LACNIC address space announced:        56.2

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:                   8091
    Total AfriNIC prefixes after maximum aggregation:              1965
    AfriNIC Deaggregation factor:                                  4.12
Prefixes being announced from the AfriNIC address blocks:          6390
    Unique aggregates announced from the AfriNIC address blocks:   1967
AfriNIC Region origin ASes present in the Internet Routing Table:   465
    AfriNIC Prefixes per ASN:                                     13.74
AfriNIC Region origin ASes announcing only one prefix:              143
AfriNIC Region transit ASes present in the Internet Routing Table:  101
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:    4
Number of AfriNIC addresses announced to Internet:             24250368
    Equivalent to 1 /8s, 114 /16s and 8 /24s
    Percentage of available AfriNIC address space announced:       36.1

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     2457       9500         924   Korea Telecom (KIX)
17974     1879        465          43   PT TELEKOMUNIKASI INDONESIA
 7545     1538        301          85   TPG Internet Pty Ltd
 4755     1478        634         168   TATA Communications formerly 
24560     1153        336         187   Bharti Airtel Ltd., Telemedia
 7552     1143       1064           7   Vietel Corporation
 9583     1079         80         510   Sify Limited
 4808     1048       2090         300   CNCGROUP IP network: China169
 9829     1042        879          56   BSNL National Internet Backbo
17488      950        190         101   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     3629       3819         250   bellsouth.net, inc. 
18566     1913        365         237   Covad Communications 
 1785     1796        681         122   PaeTec Communications, Inc.
 4323     1660       1081         397   Time Warner Telecom
 6478     1634        296         275   AT&T Worldnet Services 
20115     1522       1526         640   Charter Communications 
19262     1493       4936         308   Verizon Global Networks 
 7018     1363       7054         889   AT&T WorldNet Services
22773     1338       2897          85   Cox Communications, Inc.
 7029     1312        790         297   Alltel Information 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
34984      524        107         182   BILISIM TELEKOM
 6830      513       1780         320   UPC Distribution Services
 3292      466       2078         401   TDC Tele Danmark
20940      462        135         354   Akamai Technologies European 
29049      449         33          46   AzerSat LLC.
 8866      445        134          26   Bulgarian Telecommunication C
12479      434        593           7   Uni2 Autonomous System
 3320      420       8151         367   Deutsche Telekom AG
 8551      404        354          44   Bezeq International
 3301      398       1839         347   TeliaNet Sweden

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     1522        278         155   TVCABLE BOGOTA 
28573     1279        993          78   NET Servicos de Comunicao S.A
 8151     1269       2729         363   UniNet S.A. de C.V. 
 7303      990        506         170   Telecom Argentina Stet-France
 6503      741        354          73   AVANTEL, S.A. 
14420      683         55          82   CORPORACION NACIONAL DE TELEC
22047      572        322          17   VTR PUNTO NET S.A. 
 3816      532        231          95   Empresa Nacional de Telecomun
 7738      516        986          31   Telecomunicacoes da Bahia S.A
27947      499         53          52   Telconet 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
24863      795        147          37   LINKdotNET AS number
 8452      763        445          11   TEDATA
15475      526         74           8   Nile Online
36992      304        415          14   Etisalat MISR
 3741      265        937         226   The Internet Solution 
 6713      241        215          13   Itissalat Al-MAGHRIB
33776      215         12          11   Starcomms Nigeria Limited
24835      211         78          10   RAYA Telecom - Egypt
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     3629       3819         250   bellsouth.net, inc. 
23456     2676        661        1448   32-bit ASN transition
 4766     2457       9500         924   Korea Telecom (KIX)
18566     1913        365         237   Covad Communications 
17974     1879        465          43   PT TELEKOMUNIKASI INDONESIA
 1785     1796        681         122   PaeTec Communications, Inc.
 4323     1660       1081         397   Time Warner Telecom
 6478     1634        296         275   AT&T Worldnet Services 
 7545     1538        301          85   TPG Internet Pty Ltd
10620     1522        278         155   TVCABLE BOGOTA 

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      1879        1836      PT TELEKOMUNIKASI INDONESIA
18566      1913        1676      Covad Communications 
 1785      1796        1674      PaeTec Communications, Inc.
 4766      2457        1533      Korea Telecom (KIX)
 7545      1538        1453      TPG Internet Pty Ltd
10620      1522        1367      TVCABLE BOGOTA 
 6478      1634        1359      AT&T Worldnet Services 
 4755      1478        1310      TATA Communications formerly 
 4323      1660        1263      Time Warner Telecom
22773      1338        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.
31.132.8.0/21        15478     White Market Media SRL
31.132.32.0/20       15478     White Market Media SRL
41.190.32.0/23       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      /11:81      /12:231     
/13:462     /14:801     /15:1394    /16:11951   /17:5841    /18:9796    
/19:19380   /20:26032   /21:26006   /22:34385   /23:33300   /24:187515  
/25:1093    /26:1270    /27:729     /28:41      /29:9       /30:2       
/31:0       /32:6       

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

  ASN   No of nets  Total ann.   Description
 6389     2232          3629      bellsouth.net, inc. 
18566     1870          1913      Covad Communications 
 6478     1597          1634      AT&T Worldnet Services 
10620     1412          1522      TVCABLE BOGOTA 
23456     1328          2676      32-bit ASN transition
11492     1090          1136      Cable One 
 7011     1059          1159      Citizens Utilities 
 7029     1059          1312      Alltel Information Services, 
 1785     1050          1796      PaeTec Communications, Inc.
22773      856          1338      Cox Communications, Inc.

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

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

   1:286       2:43        4:16        5:1         6:3         8:335    
  12:1973     13:1        14:464      15:15       16:3        17:8      
  20:10       23:11       24:1653     27:790      31:444      32:64     
  33:4        34:2        37:1        38:734      40:103      41:2508   
  42:2        44:3        46:976      47:3        49:188      50:409    
  52:13       54:2        55:4        56:2        57:32       58:845    
  59:472      60:387      61:1181     62:1050     63:1935     64:3944   
  65:2271     66:3860     67:1889     68:1089     69:3026     70:723    
  71:376      72:1886     74:2377     75:319      76:339      77:881    
  78:707      79:460      80:1113     81:846      82:493      83:461    
  84:667      85:1082     86:581      87:757      88:333      89:1530   
  90:208      91:3855     92:530      93:1049     94:1294     95:838    
  96:445      97:249      98:879      99:36      101:70      103:79     
 106:7       107:14      108:71      109:1006    110:606     111:709    
 112:303     113:399     114:540     115:668     116:962     117:677    
 118:826     119:1145    120:312     121:669     122:1628    123:941    
 124:1267    125:1235    128:247     129:174     130:165     131:578    
 132:111     133:21      134:214     135:48      136:216     137:138    
 138:300     139:113     140:480     141:238     142:403     143:413    
 144:489     145:54      146:451     147:211     148:610     149:247    
 150:171     151:190     152:332     153:180     154:4       155:398    
 156:195     157:352     158:138     159:389     160:319     161:208    
 162:313     163:162     164:500     165:352     166:532     167:423    
 168:740     169:156     170:838     171:77      172:1       173:1621   
 174:602     175:362     176:135     177:160     178:1000    180:892    
 181:19      182:476     183:220     184:302     185:1       186:1241   
 187:731     188:857     189:907     190:4898    192:5856    193:4956   
 194:3492    195:3032    196:1221    197:24      198:3596    199:3945   
 200:5542    201:1501    202:8319    203:8407    204:4188    205:2348   
 206:2686    207:2815    208:3927    209:3463    210:2689    211:1424   
 212:2006    213:1726    214:773     215:69      216:4933    217:1643   
 218:545     219:365     220:1202    221:491     222:354     223:159    


End of report




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