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Weekly Routing Table Report
From: Routing Analysis Role Account <cscora () apnic net>
Date: Sat, 30 Apr 2011 05:00:59 +1000 (EST)

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 () lists apnic net

For historical data, please see http://thyme.rand.apnic.net.

If you have any comments please contact Philip Smith <pfs () cisco com>.

Routing Table Report   04:00 +10GMT Sat 30 Apr, 2011

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

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

BGP routing table entries examined:                              356141
    Prefixes after maximum aggregation:                          161025
    Deaggregation factor:                                          2.21
    Unique aggregates announced to Internet:                     175803
Total ASes present in the Internet Routing Table:                 37438
    Prefixes per ASN:                                              9.51
Origin-only ASes present in the Internet Routing Table:           31355
Origin ASes announcing only one prefix:                           15082
Transit ASes present in the Internet Routing Table:                5058
Transit-only ASes present in the Internet Routing Table:            135
Average AS path length visible in the Internet Routing Table:       4.4
    Max AS path length visible:                                      36
    Max AS path prepend of ASN (36992)                               29
Prefixes from unregistered ASNs in the Routing Table:               584
    Unregistered ASNs in the Routing Table:                         291
Number of 32-bit ASNs allocated by the RIRs:                       1317
Number of 32-bit ASNs visible in the Routing Table:                1025
Prefixes from 32-bit ASNs in the Routing Table:                    2298
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            148
Number of addresses announced to Internet:                   2420666304
    Equivalent to 144 /8s, 72 /16s and 111 /24s
    Percentage of available address space announced:               65.3
    Percentage of allocated address space announced:               65.3
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               90.6
Total number of prefixes smaller than registry allocations:      147936

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

Prefixes being announced by APNIC Region ASes:                    89082
    Total APNIC prefixes after maximum aggregation:               29925
    APNIC Deaggregation factor:                                    2.98
Prefixes being announced from the APNIC address blocks:           85522
    Unique aggregates announced from the APNIC address blocks:    36919
APNIC Region origin ASes present in the Internet Routing Table:    4425
    APNIC Prefixes per ASN:                                       19.33
APNIC Region origin ASes announcing only one prefix:               1232
APNIC Region transit ASes present in the Internet Routing Table:    703
Average APNIC Region AS path length visible:                        4.6
    Max APNIC Region AS path length visible:                         18
Number of APNIC region 32-bit ASNs visible in the Routing Table:     48
Number of APNIC addresses announced to Internet:              611294496
    Equivalent to 36 /8s, 111 /16s and 157 /24s
    Percentage of available APNIC address space announced:         77.5

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:                    140235
    Total ARIN prefixes after maximum aggregation:                71231
    ARIN Deaggregation factor:                                     1.97
Prefixes being announced from the ARIN address blocks:           112584
    Unique aggregates announced from the ARIN address blocks:     45236
ARIN Region origin ASes present in the Internet Routing Table:    14345
    ARIN Prefixes per ASN:                                         7.85
ARIN Region origin ASes announcing only one prefix:                5478
ARIN Region transit ASes present in the Internet Routing Table:    1492
Average ARIN Region AS path length visible:                         3.9
    Max ARIN Region AS path length visible:                          23
Number of ARIN region 32-bit ASNs visible in the Routing Table:      11
Number of ARIN addresses announced to Internet:               799837952
    Equivalent to 47 /8s, 172 /16s and 143 /24s
    Percentage of available ARIN address space announced:          63.6

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:                     84054
    Total RIPE prefixes after maximum aggregation:                47941
    RIPE Deaggregation factor:                                     1.75
Prefixes being announced from the RIPE address blocks:            77228
    Unique aggregates announced from the RIPE address blocks:     51126
RIPE Region origin ASes present in the Internet Routing Table:    15564
    RIPE Prefixes per ASN:                                         4.96
RIPE Region origin ASes announcing only one prefix:                7810
RIPE Region transit ASes present in the Internet Routing Table:    2440
Average RIPE Region AS path length visible:                         4.7
    Max RIPE Region AS path length visible:                          36
Number of RIPE region 32-bit ASNs visible in the Routing Table:     760
Number of RIPE addresses announced to Internet:               467574528
    Equivalent to 27 /8s, 222 /16s and 159 /24s
    Percentage of available RIPE address space announced:          75.3

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:                   32502
    Total LACNIC prefixes after maximum aggregation:               7466
    LACNIC Deaggregation factor:                                   4.35
Prefixes being announced from the LACNIC address blocks:          31515
    Unique aggregates announced from the LACNIC address blocks:   16536
LACNIC Region origin ASes present in the Internet Routing Table:   1442
    LACNIC Prefixes per ASN:                                      21.86
LACNIC Region origin ASes announcing only one prefix:               427
LACNIC Region transit ASes present in the Internet Routing Table:   261
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:   201
Number of LACNIC addresses announced to Internet:              82907136
    Equivalent to 4 /8s, 241 /16s and 16 /24s
    Percentage of available LACNIC address space announced:        54.9

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:                   7748
    Total AfriNIC prefixes after maximum aggregation:              1855
    AfriNIC Deaggregation factor:                                  4.18
Prefixes being announced from the AfriNIC address blocks:          6108
    Unique aggregates announced from the AfriNIC address blocks:   1916
AfriNIC Region origin ASes present in the Internet Routing Table:   449
    AfriNIC Prefixes per ASN:                                     13.60
AfriNIC Region origin ASes announcing only one prefix:              135
AfriNIC Region transit ASes present in the Internet Routing Table:   97
Average AfriNIC Region AS path length visible:                      4.7
    Max AfriNIC Region AS path length visible:                       31
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:    5
Number of AfriNIC addresses announced to Internet:             23373568
    Equivalent to 1 /8s, 100 /16s and 167 /24s
    Percentage of available AfriNIC address space announced:       34.8

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     2434       9482         904   Korea Telecom (KIX)
17974     1827        515          29   PT TELEKOMUNIKASI INDONESIA
 7545     1558        301          84   TPG Internet Pty Ltd
 4755     1459        634         167   TATA Communications formerly 
 7552     1214       1064           7   Vietel Corporation
24560     1158        336         190   Bharti Airtel Ltd., Telemedia
 9583     1056         77         492   Sify Limited
 4808     1035       2090         294   CNCGROUP IP network: China169
 9829     1007        870          50   BSNL National Internet Backbo
17488      944        165         100   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     3644       3822         254   bellsouth.net, inc. 
 4323     2630       1086         397   Time Warner Telecom
 1785     1791        681         128   PaeTec Communications, Inc.
18566     1790        349         229   Covad Communications 
 6478     1658        311          46   AT&T Worldnet Services 
20115     1534       1552         641   Charter Communications 
19262     1495       4949         298   Verizon Global Networks 
 7018     1343       6782         886   AT&T WorldNet Services
22773     1300       2865          84   Cox Communications, Inc.
 2386     1268        536         911   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
 6830      520       1780         322   UPC Distribution Services
34984      509        106         182   BILISIM TELEKOM
 3292      457       1997         391   TDC Tele Danmark
29049      450         33          48   AzerSat LLC.
 8866      446        134          26   Bulgarian Telecommunication C
20940      442        129         338   Akamai Technologies European 
 3320      423       7609         368   Deutsche Telekom AG
12479      408        577           6   Uni2 Autonomous System
 8551      405        354          47   Bezeq International
  702      396       1802         309   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     1448        268         160   TVCABLE BOGOTA 
28573     1289        988          87   NET Servicos de Comunicao S.A
 8151     1251       2690         369   UniNet S.A. de C.V. 
 7303      926        467         149   Telecom Argentina Stet-France
 6503      852        354          73   AVANTEL, S.A. 
14420      665         53          91   CORPORACION NACIONAL DE TELEC
22047      564        310          15   VTR PUNTO NET S.A. 
 3816      517        226          98   Empresa Nacional de Telecomun
11172      489         99          82   Servicios Alestra S.A de C.V 
13489      484        221         116   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      881        445          11   TEDATA
24863      779        147          39   LINKdotNET AS number
15475      421         90           8   Nile Online
36992      299        415          13   Etisalat MISR
 3741      267        985         227   The Internet Solution 
 6713      240        215          13   Itissalat Al-MAGHRIB
24835      211         78          10   RAYA Telecom - Egypt
33776      208         12          10   Starcomms Nigeria Limited
29571      161         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     3644       3822         254   bellsouth.net, inc. 
 4323     2630       1086         397   Time Warner Telecom
 4766     2434       9482         904   Korea Telecom (KIX)
23456     2298        658        1255   32-bit ASN transition
17974     1827        515          29   PT TELEKOMUNIKASI INDONESIA
 1785     1791        681         128   PaeTec Communications, Inc.
18566     1790        349         229   Covad Communications 
 6478     1658        311          46   AT&T Worldnet Services 
 7545     1558        301          84   TPG Internet Pty Ltd
20115     1534       1552         641   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
 4323      2630        2233      Time Warner Telecom
17974      1827        1798      PT TELEKOMUNIKASI INDONESIA
 1785      1791        1663      PaeTec Communications, Inc.
 6478      1658        1612      AT&T Worldnet Services 
18566      1790        1561      Covad Communications 
 4766      2434        1530      Korea Telecom (KIX)
 7545      1558        1474      TPG Internet Pty Ltd
 4755      1459        1292      TATA Communications formerly 
10620      1448        1288      TVCABLE BOGOTA 
11492      1261        1246      Cable One 

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
13746   UNALLOCATED  12.24.56.0/24         7018       AT&T WorldNet Servic
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

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<<
45.127.0.0/16        13767     NetworkTwo Communications Gro
62.61.220.0/24       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        /8:20       /9:12      /10:28      /11:77      /12:221     
/13:459     /14:790     /15:1386    /16:11667   /17:5753    /18:9651    
/19:19182   /20:25623   /21:25636   /22:33862   /23:32708   /24:185857  
/25:1132    /26:1317    /27:705     /28:39      /29:8       /30:2       
/31:0       /32:6       

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

  ASN   No of nets  Total ann.   Description
 6389     2245          3644      bellsouth.net, inc. 
18566     1758          1790      Covad Communications 
 6478     1612          1658      AT&T Worldnet Services 
10620     1338          1448      TVCABLE BOGOTA 
 4323     1332          2630      Time Warner Telecom
11492     1210          1261      Cable One 
23456     1151          2298      32-bit ASN transition
 7011     1062          1161      Citizens Utilities 
 1785     1059          1791      PaeTec Communications, Inc.
22773      844          1300      Cox Communications, Inc.

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

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

   1:264       2:51        4:14        5:1         6:3         8:351    
  12:1987     13:1        14:443      15:15       16:3        17:8      
  20:9        23:5        24:1613     27:720      31:233      32:60     
  33:3        34:2        37:1        38:765      40:101      41:2441   
  42:5        44:3        46:885      47:4        49:171      50:375    
  52:13       55:5        56:2        57:31       58:840      59:481    
  60:387      61:1266     62:981      63:1932     64:3956     65:2322   
  66:4374     67:1868     68:1077     69:2971     70:704      71:346    
  72:1893     73:1        74:2360     75:298      76:334      77:836    
  78:678      79:454      80:1092     81:814      82:496      83:461    
  84:650      85:1080     86:566      87:748      88:322      89:1597   
  90:183      91:3714     92:512      93:1059     94:1263     95:796    
  96:478      97:253      98:823      99:35      101:68      103:5      
 106:1       107:6       108:83      109:941     110:561     111:699    
 112:320     113:397     114:530     115:685     116:952     117:681    
 118:809     119:1139    120:306     121:671     122:1623    123:1075   
 124:1255    125:1220    128:264     129:163     130:172     131:568    
 132:112     133:19      134:217     135:49      136:214     137:141    
 138:302     139:106     140:479     141:174     142:400     143:403    
 144:487     145:52      146:441     147:208     148:591     149:243    
 150:171     151:187     152:309     153:179     154:3       155:396    
 156:190     157:353     158:133     159:384     160:314     161:247    
 162:277     163:164     164:494     165:351     166:511     167:426    
 168:721     169:153     170:788     171:76      172:1       173:1511   
 174:535     175:361     177:81      178:851     180:817     181:15     
 182:436     183:204     184:258     185:1       186:1137    187:810    
 188:988     189:969     190:4836    192:5789    193:4844    194:3470   
 195:2974    196:1204    197:16      198:3570    199:3910    200:5522   
 201:1499    202:8374    203:8448    204:4138    205:2325    206:2749   
 207:3030    208:3952    209:3472    210:2729    211:1386    212:1968   
 213:1686    214:736     215:67      216:4879    217:1651    218:563    
 219:374     220:1202    221:484     222:342     223:145    

End of report


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