Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Jun 24 14:05:08 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 25 Jun, 2011

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

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

BGP routing table entries examined:                              361681
    Prefixes after maximum aggregation:                          164222
    Deaggregation factor:                                          2.20
    Unique aggregates announced to Internet:                     178750
Total ASes present in the Internet Routing Table:                 37989
    Prefixes per ASN:                                              9.52
Origin-only ASes present in the Internet Routing Table:           31644
Origin ASes announcing only one prefix:                           15205
Transit ASes present in the Internet Routing Table:                5162
Transit-only ASes present in the Internet Routing Table:            136
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:               849
    Unregistered ASNs in the Routing Table:                         461
Number of 32-bit ASNs allocated by the RIRs:                       1493
Number of 32-bit ASNs visible in the Routing Table:                1183
Prefixes from 32-bit ASNs in the Routing Table:                    2711
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            137
Number of addresses announced to Internet:                   2493130048
    Equivalent to 148 /8s, 154 /16s and 37 /24s
    Percentage of available address space announced:               67.3
    Percentage of allocated address space announced:               67.3
    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:      150698

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

Prefixes being announced by APNIC Region ASes:                    89840
    Total APNIC prefixes after maximum aggregation:               30209
    APNIC Deaggregation factor:                                    2.97
Prefixes being announced from the APNIC address blocks:           86590
    Unique aggregates announced from the APNIC address blocks:    36226
APNIC Region origin ASes present in the Internet Routing Table:    4497
    APNIC Prefixes per ASN:                                       19.26
APNIC Region origin ASes announcing only one prefix:               1249
APNIC Region transit ASes present in the Internet Routing Table:    712
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:     52
Number of APNIC addresses announced to Internet:              622748704
    Equivalent to 37 /8s, 30 /16s and 100 /24s
    Percentage of available APNIC address space announced:         79.0

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:                    141304
    Total ARIN prefixes after maximum aggregation:                72518
    ARIN Deaggregation factor:                                     1.95
Prefixes being announced from the ARIN address blocks:           113252
    Unique aggregates announced from the ARIN address blocks:     46525
ARIN Region origin ASes present in the Internet Routing Table:    14441
    ARIN Prefixes per ASN:                                         7.84
ARIN Region origin ASes announcing only one prefix:                5515
ARIN Region transit ASes present in the Internet Routing Table:    1518
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:               819201536
    Equivalent to 48 /8s, 212 /16s and 6 /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:                     86138
    Total RIPE prefixes after maximum aggregation:                48944
    RIPE Deaggregation factor:                                     1.76
Prefixes being announced from the RIPE address blocks:            79529
    Unique aggregates announced from the RIPE address blocks:     52628
RIPE Region origin ASes present in the Internet Routing Table:    15751
    RIPE Prefixes per ASN:                                         5.05
RIPE Region origin ASes announcing only one prefix:                7864
RIPE Region transit ASes present in the Internet Routing Table:    2496
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:     870
Number of RIPE addresses announced to Internet:               478213376
    Equivalent to 28 /8s, 128 /16s and 245 /24s
    Percentage of available RIPE address space announced:          77.0

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:                   33273
    Total LACNIC prefixes after maximum aggregation:               7572
    LACNIC Deaggregation factor:                                   4.39
Prefixes being announced from the LACNIC address blocks:          32313
    Unique aggregates announced from the LACNIC address blocks:   16912
LACNIC Region origin ASes present in the Internet Routing Table:   1471
    LACNIC Prefixes per ASN:                                      21.97
LACNIC Region origin ASes announcing only one prefix:               439
LACNIC Region transit ASes present in the Internet Routing Table:   264
Average LACNIC Region AS path length visible:                       4.4
    Max LACNIC Region AS path length visible:                        19
Number of LACNIC region 32-bit ASNs visible in the Routing Table:   245
Number of LACNIC addresses announced to Internet:              85595904
    Equivalent to 5 /8s, 26 /16s and 23 /24s
    Percentage of available LACNIC address space announced:        56.7

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:                   8197
    Total AfriNIC prefixes after maximum aggregation:              1952
    AfriNIC Deaggregation factor:                                  4.20
Prefixes being announced from the AfriNIC address blocks:          6495
    Unique aggregates announced from the AfriNIC address blocks:   1981
AfriNIC Region origin ASes present in the Internet Routing Table:   459
    AfriNIC Prefixes per ASN:                                     14.15
AfriNIC Region origin ASes announcing only one prefix:              138
AfriNIC Region transit ASes present in the Internet Routing Table:  102
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:             24303616
    Equivalent to 1 /8s, 114 /16s and 216 /24s
    Percentage of available AfriNIC address space announced:       36.2

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     2458       9500         928   Korea Telecom (KIX)
17974     1842        460          45   PT TELEKOMUNIKASI INDONESIA
 7545     1542        301          84   TPG Internet Pty Ltd
 4755     1479        634         168   TATA Communications formerly 
24560     1153        336         187   Bharti Airtel Ltd., Telemedia
 9583     1079         80         510   Sify Limited
 4808     1051       2092         302   CNCGROUP IP network: China169
 9829     1043        886          64   BSNL National Internet Backbo
17488      957        183         104   Hathway IP Over Cable Interne
18101      931        116         138   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     3629       3819         249   bellsouth.net, inc. 
18566     1913        365         241   Covad Communications 
 1785     1797        681         122   PaeTec Communications, Inc.
 4323     1661       1081         398   Time Warner Telecom
20115     1586       1531         635   Charter Communications 
 6478     1499        276         522   AT&T Worldnet Services 
19262     1451       4805         372   Verizon Global Networks 
 7018     1358       7053         892   AT&T WorldNet Services
22773     1346       2897          87   Cox Communications, Inc.
 7029     1309        790         298   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      530        107         183   BILISIM TELEKOM
 6830      515       1780         320   UPC Distribution Services
 3292      469       2080         404   TDC Tele Danmark
20940      467        137         359   Akamai Technologies European 
 8866      445        134          26   Bulgarian Telecommunication C
29049      444         33          45   AzerSat LLC.
12479      437        593           7   Uni2 Autonomous System
 3320      420       8151         367   Deutsche Telekom AG
 8551      404        354          44   Bezeq International
 3301      396       1839         345   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     1532        281         157   TVCABLE BOGOTA 
 8151     1422       2736         358   UniNet S.A. de C.V. 
28573     1264        993          78   NET Servicos de Comunicao S.A
 7303      993        507         171   Telecom Argentina Stet-France
 6503      741        354          74   AVANTEL, S.A. 
14420      683         55          82   CORPORACION NACIONAL DE TELEC
22047      576        322          17   VTR PUNTO NET S.A. 
 3816      531        231          94   Empresa Nacional de Telecomun
 7738      516        986          31   Telecomunicacoes da Bahia S.A
27947      500         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      798        147          37   LINKdotNET AS number
 8452      791        445          11   TEDATA
15475      525         74           8   Nile Online
36992      318        415          14   Etisalat MISR
 3741      261        937         223   The Internet Solution 
 6713      241        215          13   Itissalat Al-MAGHRIB
33776      216         12          11   Starcomms Nigeria Limited
24835      211         78          10   RAYA Telecom - Egypt
29571      192         17          11   Ci Telecom Autonomous system 
16637      149        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         249   bellsouth.net, inc. 
23456     2711        657        1466   32-bit ASN transition
 4766     2458       9500         928   Korea Telecom (KIX)
18566     1913        365         241   Covad Communications 
17974     1842        460          45   PT TELEKOMUNIKASI INDONESIA
 1785     1797        681         122   PaeTec Communications, Inc.
 4323     1661       1081         398   Time Warner Telecom
20115     1586       1531         635   Charter Communications 
 7545     1542        301          84   TPG Internet Pty Ltd
10620     1532        281         157   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      1842        1797      PT TELEKOMUNIKASI INDONESIA
 1785      1797        1675      PaeTec Communications, Inc.
18566      1913        1672      Covad Communications 
 4766      2458        1530      Korea Telecom (KIX)
 7545      1542        1458      TPG Internet Pty Ltd
10620      1532        1375      TVCABLE BOGOTA 
 4755      1479        1311      TATA Communications formerly 
 4323      1661        1263      Time Warner Telecom
22773      1346        1259      Cox Communications, Inc.
23456      2711        1245      32-bit ASN transition

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        /8:23       /9:12      /10:28      /11:81      /12:231     
/13:461     /14:800     /15:1395    /16:11963   /17:5860    /18:9743    
/19:19407   /20:25807   /21:26086   /22:34501   /23:33493   /24:188475  
/25:1088    /26:1268    /27:728     /28:214     /29:9       /30:2       
/31:0       /32:6       

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

  ASN   No of nets  Total ann.   Description
 6389     2233          3629      bellsouth.net, inc. 
18566     1869          1913      Covad Communications 
 6478     1466          1499      AT&T Worldnet Services 
10620     1427          1532      TVCABLE BOGOTA 
23456     1335          2711      32-bit ASN transition
11492     1090          1136      Cable One 
 7011     1058          1159      Citizens Utilities 
 7029     1055          1309      Alltel Information Services, 
 1785     1050          1797      PaeTec Communications, Inc.
22773      861          1346      Cox Communications, Inc.

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

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

   1:297       2:42        4:16        5:1         6:3         8:336    
  12:1978     13:1        14:463      15:15       16:3        17:8      
  20:10       23:12       24:1657     27:806      31:482      32:64     
  33:4        34:2        37:1        38:738      39:3        40:103    
  41:2550     42:2        44:3        46:986      47:3        49:196    
  50:413      52:13       54:2        55:2        56:2        57:32     
  58:856      59:473      60:386      61:1183     62:1051     63:1937   
  64:3945     65:2288     66:3881     67:1901     68:1092     69:3048   
  70:756      71:388      72:1888     74:2383     75:319      76:340    
  77:884      78:714      79:464      80:1109     81:837      82:492    
  83:456      84:670      85:1078     86:552      87:759      88:333    
  89:1525     90:209      91:3871     92:536      93:1045     94:1316   
  95:839      96:445      97:253      98:880      99:36      101:76     
 103:90      106:10      107:16      108:70      109:1012    110:612    
 111:707     112:303     113:406     114:543     115:666     116:968    
 117:671     118:851     119:1144    120:313     121:669     122:1633   
 123:959     124:1303    125:1239    128:247     129:172     130:168    
 131:577     132:112     133:21      134:214     135:48      136:214    
 137:138     138:300     139:114     140:479     141:239     142:403    
 143:419     144:489     145:54      146:450     147:215     148:659    
 149:245     150:170     151:190     152:332     153:180     154:4      
 155:398     156:195     157:350     158:137     159:452     160:313    
 161:208     162:310     163:162     164:506     165:354     166:534    
 167:433     168:739     169:158     170:846     171:78      172:1      
 173:1621    174:607     175:372     176:138     177:150     178:1008   
 180:898     181:19      182:484     183:223     184:307     185:1      
 186:1234    187:738     188:873     189:913     190:4908    192:5867   
 193:4973    194:3489    195:3040    196:1222    197:41      198:3586   
 199:3958    200:5530    201:1503    202:8356    203:8429    204:4202   
 205:2347    206:2682    207:2809    208:3955    209:3471    210:2727   
 211:1460    212:2100    213:1739    214:772     215:69      216:4933   
 217:1636    218:549     219:362     220:1207    221:490     222:361    
 223:161    

End of report




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