Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri May 6 14:00:30 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 <pfs at cisco.com>.

Routing Table Report   04:00 +10GMT Sat 07 May, 2011

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

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

BGP routing table entries examined:                              356623
    Prefixes after maximum aggregation:                          161219
    Deaggregation factor:                                          2.21
    Unique aggregates announced to Internet:                     176188
Total ASes present in the Internet Routing Table:                 37501
    Prefixes per ASN:                                              9.51
Origin-only ASes present in the Internet Routing Table:           31368
Origin ASes announcing only one prefix:                           15102
Transit ASes present in the Internet Routing Table:                5082
Transit-only ASes present in the Internet Routing Table:            139
Average AS path length visible in the Internet Routing Table:       4.4
    Max AS path length visible:                                      36
    Max AS path prepend of ASN (48687)                               24
Prefixes from unregistered ASNs in the Routing Table:               592
    Unregistered ASNs in the Routing Table:                         299
Number of 32-bit ASNs allocated by the RIRs:                       1333
Number of 32-bit ASNs visible in the Routing Table:                1051
Prefixes from 32-bit ASNs in the Routing Table:                    2383
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            147
Number of addresses announced to Internet:                   2423268544
    Equivalent to 144 /8s, 112 /16s and 36 /24s
    Percentage of available address space announced:               65.4
    Percentage of allocated address space announced:               65.4
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               90.7
Total number of prefixes smaller than registry allocations:      148140

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

Prefixes being announced by APNIC Region ASes:                    89329
    Total APNIC prefixes after maximum aggregation:               29919
    APNIC Deaggregation factor:                                    2.99
Prefixes being announced from the APNIC address blocks:           85712
    Unique aggregates announced from the APNIC address blocks:    36913
APNIC Region origin ASes present in the Internet Routing Table:    4437
    APNIC Prefixes per ASN:                                       19.32
APNIC Region origin ASes announcing only one prefix:               1235
APNIC Region transit ASes present in the Internet Routing Table:    707
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:              612912416
    Equivalent to 36 /8s, 136 /16s and 77 /24s
    Percentage of available APNIC address space announced:         77.7

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:                    140234
    Total ARIN prefixes after maximum aggregation:                71250
    ARIN Deaggregation factor:                                     1.97
Prefixes being announced from the ARIN address blocks:           112594
    Unique aggregates announced from the ARIN address blocks:     45335
ARIN Region origin ASes present in the Internet Routing Table:    14357
    ARIN Prefixes per ASN:                                         7.84
ARIN Region origin ASes announcing only one prefix:                5492
ARIN Region transit ASes present in the Internet Routing Table:    1499
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          23
Number of ARIN region 32-bit ASNs visible in the Routing Table:      12
Number of ARIN addresses announced to Internet:               800024832
    Equivalent to 47 /8s, 175 /16s and 105 /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:                     83935
    Total RIPE prefixes after maximum aggregation:                48029
    RIPE Deaggregation factor:                                     1.75
Prefixes being announced from the RIPE address blocks:            77374
    Unique aggregates announced from the RIPE address blocks:     51246
RIPE Region origin ASes present in the Internet Routing Table:    15569
    RIPE Prefixes per ASN:                                         4.97
RIPE Region origin ASes announcing only one prefix:                7811
RIPE Region transit ASes present in the Internet Routing Table:    2452
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:     777
Number of RIPE addresses announced to Internet:               468167936
    Equivalent to 27 /8s, 231 /16s and 173 /24s
    Percentage of available RIPE address space announced:          75.4

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:                   32749
    Total LACNIC prefixes after maximum aggregation:               7494
    LACNIC Deaggregation factor:                                   4.37
Prefixes being announced from the LACNIC address blocks:          31794
    Unique aggregates announced from the LACNIC address blocks:   16628
LACNIC Region origin ASes present in the Internet Routing Table:   1450
    LACNIC Prefixes per ASN:                                      21.93
LACNIC Region origin ASes announcing only one prefix:               430
LACNIC Region transit ASes present in the Internet Routing Table:   268
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:   209
Number of LACNIC addresses announced to Internet:              83079680
    Equivalent to 4 /8s, 243 /16s and 178 /24s
    Percentage of available LACNIC address space announced:        55.0

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:                   7778
    Total AfriNIC prefixes after maximum aggregation:              1857
    AfriNIC Deaggregation factor:                                  4.19
Prefixes being announced from the AfriNIC address blocks:          6135
    Unique aggregates announced from the AfriNIC address blocks:   1917
AfriNIC Region origin ASes present in the Internet Routing Table:   447
    AfriNIC Prefixes per ASN:                                     13.72
AfriNIC Region origin ASes announcing only one prefix:              134
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:                       24
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:    5
Number of AfriNIC addresses announced to Internet:             23038208
    Equivalent to 1 /8s, 95 /16s and 137 /24s
    Percentage of available AfriNIC address space announced:       34.3

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     2436       9490         906   Korea Telecom (KIX)
17974     1813        515          29   PT TELEKOMUNIKASI INDONESIA
 7545     1565        301          86   TPG Internet Pty Ltd
 4755     1461        634         167   TATA Communications formerly 
 7552     1204       1064           7   Vietel Corporation
24560     1151        336         184   Bharti Airtel Ltd., Telemedia
 9583     1057         77         492   Sify Limited
 9829     1039        874          51   BSNL National Internet Backbo
 4808     1036       2087         294   CNCGROUP IP network: China169
17488      938        164         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         258   bellsouth.net, inc. 
 4323     2582       1087         399   Time Warner Telecom
 1785     1785        681         127   PaeTec Communications, Inc.
18566     1782        354         219   Covad Communications 
 6478     1667        313          52   AT&T Worldnet Services 
20115     1531       1536         636   Charter Communications 
19262     1496       4949         298   Verizon Global Networks 
 7018     1359       6927         887   AT&T WorldNet Services
22773     1329       2897          87   Cox Communications, Inc.
 2386     1265        536         908   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      519       1780         321   UPC Distribution Services
34984      508        106         184   BILISIM TELEKOM
 3292      457       1997         391   TDC Tele Danmark
20940      446        131         342   Akamai Technologies European 
 8866      444        134          26   Bulgarian Telecommunication C
29049      443         33          43   AzerSat LLC.
 3320      423       7609         368   Deutsche Telekom AG
12479      419        577           6   Uni2 Autonomous System
 8551      406        355          45   Bezeq International
 8402      401        320          11   Corbina telecom

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     1458        270         155   TVCABLE BOGOTA 
 8151     1366       2698         364   UniNet S.A. de C.V. 
28573     1298        990          89   NET Servicos de Comunicao S.A
 7303      926        467         149   Telecom Argentina Stet-France
 6503      801        354          73   AVANTEL, S.A. 
14420      665         53          91   CORPORACION NACIONAL DE TELEC
22047      557        310          15   VTR PUNTO NET S.A. 
 3816      518        226          99   Empresa Nacional de Telecomun
11172      495         84          83   Servicios Alestra S.A de C.V 
13489      487        233         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      782        147          37   LINKdotNET AS number
15475      421         90           8   Nile Online
36992      287        331          17   Etisalat MISR
 3741      267        985         227   The Internet Solution 
 6713      240        215          13   Itissalat Al-MAGHRIB
33776      214         12          11   Starcomms Nigeria Limited
24835      209         78          10   RAYA Telecom - Egypt
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         258   bellsouth.net, inc. 
 4323     2582       1087         399   Time Warner Telecom
 4766     2436       9490         906   Korea Telecom (KIX)
23456     2383        666        1288   32-bit ASN transition
17974     1813        515          29   PT TELEKOMUNIKASI INDONESIA
 1785     1785        681         127   PaeTec Communications, Inc.
18566     1782        354         219   Covad Communications 
 6478     1667        313          52   AT&T Worldnet Services 
 7545     1565        301          86   TPG Internet Pty Ltd
20115     1531       1536         636   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      2582        2183      Time Warner Telecom
17974      1813        1784      PT TELEKOMUNIKASI INDONESIA
 1785      1785        1658      PaeTec Communications, Inc.
 6478      1667        1615      AT&T Worldnet Services 
18566      1782        1563      Covad Communications 
 4766      2436        1530      Korea Telecom (KIX)
 7545      1565        1479      TPG Internet Pty Ltd
10620      1458        1303      TVCABLE BOGOTA 
 4755      1461        1294      TATA Communications formerly 
11492      1262        1247      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
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
31.210.248.0/21      35706     Net at Once
41.222.79.0/24       36938     >>UNKNOWN<<
41.223.92.0/22       36936     >>UNKNOWN<<
45.127.0.0/16        13767     NetworkTwo Communications Gro

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      /11:78      /12:223     
/13:458     /14:790     /15:1389    /16:11689   /17:5747    /18:9693    
/19:19273   /20:25574   /21:25731   /22:33992   /23:32787   /24:185889  
/25:1096    /26:1273    /27:707     /28:158     /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     1744          1782      Covad Communications 
 6478     1621          1667      AT&T Worldnet Services 
10620     1348          1458      TVCABLE BOGOTA 
 4323     1289          2582      Time Warner Telecom
11492     1211          1262      Cable One 
23456     1182          2383      32-bit ASN transition
 7011     1062          1162      Citizens Utilities 
 1785     1054          1785      PaeTec Communications, Inc.
22773      846          1329      Cox Communications, Inc.

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

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

   1:265       2:61        4:14        5:1         6:3         8:353    
  12:1992     13:1        14:452      15:15       16:3        17:8      
  20:10       23:6        24:1627     27:734      31:296      32:63     
  33:3        34:2        37:1        38:765      40:101      41:2485   
  42:4        44:3        46:906      47:4        49:172      50:388    
  52:13       55:4        56:2        57:30       58:843      59:482    
  60:387      61:1254     62:995      63:1926     64:3927     65:2308   
  66:4319     67:1873     68:1079     69:2966     70:699      71:346    
  72:1884     73:1        74:2339     75:299      76:338      77:838    
  78:688      79:454      80:1079     81:813      82:494      83:446    
  84:630      85:1076     86:577      87:747      88:323      89:1596   
  90:192      91:3707     92:511      93:1062     94:1266     95:804    
  96:482      97:255      98:823      99:35      101:69      103:9      
 107:6       108:85      109:946     110:583     111:710     112:318    
 113:399     114:532     115:657     116:949     117:678     118:818    
 119:1143    120:305     121:672     122:1619    123:1080    124:1254   
 125:1221    128:259     129:163     130:165     131:564     132:109    
 133:19      134:217     135:49      136:214     137:143     138:302    
 139:105     140:480     141:239     142:400     143:398     144:486    
 145:50      146:436     147:210     148:595     149:243     150:171    
 151:187     152:310     153:179     154:3       155:396     156:190    
 157:352     158:130     159:384     160:315     161:205     162:279    
 163:164     164:498     165:349     166:513     167:426     168:699    
 169:153     170:784     171:77      172:1       173:1538    174:538    
 175:373     177:119     178:859     180:818     181:19      182:434    
 183:208     184:260     185:1       186:1153    187:800     188:847    
 189:941     190:4853    192:5792    193:4827    194:3466    195:2966   
 196:1201    197:16      198:3564    199:3921    200:5526    201:1504   
 202:8357    203:8448    204:4137    205:2327    206:2747    207:3038   
 208:3960    209:3481    210:2721    211:1372    212:1978    213:1718   
 214:721     215:64      216:4893    217:1657    218:565     219:371    
 220:1204    221:484     222:342     223:146    

End of report




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