Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri May 20 13:59:34 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 21 May, 2011

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

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

BGP routing table entries examined:                              357743
    Prefixes after maximum aggregation:                          161995
    Deaggregation factor:                                          2.21
    Unique aggregates announced to Internet:                     176757
Total ASes present in the Internet Routing Table:                 37632
    Prefixes per ASN:                                              9.51
Origin-only ASes present in the Internet Routing Table:           31443
Origin ASes announcing only one prefix:                           15107
Transit ASes present in the Internet Routing Table:                5101
Transit-only ASes present in the Internet Routing Table:            135
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      36
    Max AS path prepend of ASN (48687)                               24
Prefixes from unregistered ASNs in the Routing Table:               647
    Unregistered ASNs in the Routing Table:                         338
Number of 32-bit ASNs allocated by the RIRs:                       1366
Number of 32-bit ASNs visible in the Routing Table:                1088
Prefixes from 32-bit ASNs in the Routing Table:                    2459
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            166
Number of addresses announced to Internet:                   2432900032
    Equivalent to 145 /8s, 3 /16s and 27 /24s
    Percentage of available address space announced:               65.6
    Percentage of allocated address space announced:               65.6
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               90.9
Total number of prefixes smaller than registry allocations:      148733

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

Prefixes being announced by APNIC Region ASes:                    89422
    Total APNIC prefixes after maximum aggregation:               30028
    APNIC Deaggregation factor:                                    2.98
Prefixes being announced from the APNIC address blocks:           85798
    Unique aggregates announced from the APNIC address blocks:    36687
APNIC Region origin ASes present in the Internet Routing Table:    4453
    APNIC Prefixes per ASN:                                       19.27
APNIC Region origin ASes announcing only one prefix:               1236
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:                         21
Number of APNIC region 32-bit ASNs visible in the Routing Table:     46
Number of APNIC addresses announced to Internet:              615312672
    Equivalent to 36 /8s, 172 /16s and 237 /24s
    Percentage of available APNIC address space announced:         78.0

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:                    140448
    Total ARIN prefixes after maximum aggregation:                71554
    ARIN Deaggregation factor:                                     1.96
Prefixes being announced from the ARIN address blocks:           112638
    Unique aggregates announced from the ARIN address blocks:     45620
ARIN Region origin ASes present in the Internet Routing Table:    14381
    ARIN Prefixes per ASN:                                         7.83
ARIN Region origin ASes announcing only one prefix:                5494
ARIN Region transit ASes present in the Internet Routing Table:    1498
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:               801671424
    Equivalent to 47 /8s, 200 /16s and 137 /24s
    Percentage of available ARIN address space announced:          63.7

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:                     84534
    Total RIPE prefixes after maximum aggregation:                48247
    RIPE Deaggregation factor:                                     1.75
Prefixes being announced from the RIPE address blocks:            78018
    Unique aggregates announced from the RIPE address blocks:     51632
RIPE Region origin ASes present in the Internet Routing Table:    15619
    RIPE Prefixes per ASN:                                         5.00
RIPE Region origin ASes announcing only one prefix:                7813
RIPE Region transit ASes present in the Internet Routing Table:    2464
Average RIPE Region AS path length visible:                         4.6
    Max RIPE Region AS path length visible:                          36
Number of RIPE region 32-bit ASNs visible in the Routing Table:     805
Number of RIPE addresses announced to Internet:               472636160
    Equivalent to 28 /8s, 43 /16s and 219 /24s
    Percentage of available RIPE address space announced:          76.1

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:                   32829
    Total LACNIC prefixes after maximum aggregation:               7512
    LACNIC Deaggregation factor:                                   4.37
Prefixes being announced from the LACNIC address blocks:          31866
    Unique aggregates announced from the LACNIC address blocks:   16758
LACNIC Region origin ASes present in the Internet Routing Table:   1456
    LACNIC Prefixes per ASN:                                      21.89
LACNIC Region origin ASes announcing only one prefix:               431
LACNIC Region transit ASes present in the Internet Routing Table:   266
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:   220
Number of LACNIC addresses announced to Internet:              83532288
    Equivalent to 4 /8s, 250 /16s and 154 /24s
    Percentage of available LACNIC address space announced:        55.3

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:                   7836
    Total AfriNIC prefixes after maximum aggregation:              1877
    AfriNIC Deaggregation factor:                                  4.17
Prefixes being announced from the AfriNIC address blocks:          6175
    Unique aggregates announced from the AfriNIC address blocks:   1909
AfriNIC Region origin ASes present in the Internet Routing Table:   448
    AfriNIC Prefixes per ASN:                                     13.78
AfriNIC Region origin ASes announcing only one prefix:              133
AfriNIC Region transit ASes present in the Internet Routing Table:  100
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:    5
Number of AfriNIC addresses announced to Internet:             23174656
    Equivalent to 1 /8s, 97 /16s and 158 /24s
    Percentage of available AfriNIC address space announced:       34.5

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       9494         918   Korea Telecom (KIX)
17974     1832        516          32   PT TELEKOMUNIKASI INDONESIA
 7545     1556        301          87   TPG Internet Pty Ltd
 4755     1472        635         169   TATA Communications formerly 
24560     1153        336         184   Bharti Airtel Ltd., Telemedia
 7552     1123       1064           7   Vietel Corporation
 9583     1082         81         511   Sify Limited
 4808     1080       2141         298   CNCGROUP IP network: China169
 9829     1039        874          51   BSNL National Internet Backbo
18101      935        116         142   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     3645       3822         255   bellsouth.net, inc. 
 4323     1976       1081         397   Time Warner Telecom
18566     1860        354         267   Covad Communications 
 1785     1786        681         123   PaeTec Communications, Inc.
 6478     1693        315          55   AT&T Worldnet Services 
20115     1538       1540         635   Charter Communications 
19262     1496       4943         300   Verizon Global Networks 
 7018     1365       7069         890   AT&T WorldNet Services
22773     1330       2897          88   Cox Communications, Inc.
11492     1279        240          15   Cable One 

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         321   UPC Distribution Services
34984      514        106         182   BILISIM TELEKOM
 3292      460       2062         395   TDC Tele Danmark
20940      457        134         351   Akamai Technologies European 
29049      453         33          44   AzerSat LLC.
 8866      444        134          26   Bulgarian Telecommunication C
12479      432        577           6   Uni2 Autonomous System
 3320      426       8153         371   Deutsche Telekom AG
 8551      406        355          45   Bezeq International
  702      395       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     1481        273         154   TVCABLE BOGOTA 
 8151     1375       2702         362   UniNet S.A. de C.V. 
28573     1314        991          86   NET Servicos de Comunicao S.A
 7303      925        470         151   Telecom Argentina Stet-France
 6503      731        354          73   AVANTEL, S.A. 
14420      670         54          91   CORPORACION NACIONAL DE TELEC
22047      563        310          15   VTR PUNTO NET S.A. 
 3816      522        227         101   Empresa Nacional de Telecomun
13489      511        254         124   Orbitel S.A. E.S.P. 
11172      493         84          83   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
 8452      894        445          11   TEDATA
24863      787        147          37   LINKdotNET AS number
15475      415         90           8   Nile Online
36992      287        331          17   Etisalat MISR
 3741      268        985         228   The Internet Solution 
 6713      241        215          13   Itissalat Al-MAGHRIB
33776      217         12          11   Starcomms Nigeria Limited
24835      208         78          10   RAYA Telecom - Egypt
29571      163         19          12   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     3645       3822         255   bellsouth.net, inc. 
23456     2459        631        1341   32-bit ASN transition
 4766     2457       9494         918   Korea Telecom (KIX)
 4323     1976       1081         397   Time Warner Telecom
18566     1860        354         267   Covad Communications 
17974     1832        516          32   PT TELEKOMUNIKASI INDONESIA
 1785     1786        681         123   PaeTec Communications, Inc.
 6478     1693        315          55   AT&T Worldnet Services 
 7545     1556        301          87   TPG Internet Pty Ltd
20115     1538       1540         635   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
17974      1832        1800      PT TELEKOMUNIKASI INDONESIA
 1785      1786        1663      PaeTec Communications, Inc.
 6478      1693        1638      AT&T Worldnet Services 
18566      1860        1593      Covad Communications 
 4323      1976        1579      Time Warner Telecom
 4766      2457        1539      Korea Telecom (KIX)
 7545      1556        1469      TPG Internet Pty Ltd
10620      1481        1327      TVCABLE BOGOTA 
 4755      1472        1303      TATA Communications formerly 
11492      1279        1264      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
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        /8:20       /9:12      /10:28      /11:79      /12:226     
/13:461     /14:793     /15:1393    /16:11769   /17:5810    /18:9731    
/19:19329   /20:25643   /21:25885   /22:34217   /23:32989   /24:186103  
/25:1087    /26:1274    /27:713     /28:165     /29:8       /30:2       
/31:0       /32:6       

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

  ASN   No of nets  Total ann.   Description
 6389     2245          3645      bellsouth.net, inc. 
18566     1824          1860      Covad Communications 
 6478     1647          1693      AT&T Worldnet Services 
10620     1371          1481      TVCABLE BOGOTA 
11492     1225          1279      Cable One 
23456     1204          2459      32-bit ASN transition
 7011     1060          1159      Citizens Utilities 
 1785     1051          1786      PaeTec Communications, Inc.
 4323      886          1976      Time Warner Telecom
22773      846          1330      Cox Communications, Inc.

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

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

   1:279       2:39        4:14        5:1         6:3         8:352    
  12:1985     13:1        14:457      15:15       16:3        17:8      
  20:10       23:7        24:1633     27:753      31:345      32:60     
  33:4        34:2        37:1        38:738      40:101      41:2537   
  42:5        44:3        46:920      47:4        49:194      50:415    
  52:13       55:3        56:2        57:30       58:844      59:481    
  60:387      61:1235     62:960      63:1935     64:3941     65:2292   
  66:4158     67:1846     68:1092     69:2985     70:704      71:352    
  72:1883     73:1        74:2351     75:303      76:340      77:870    
  78:709      79:464      80:1094     81:821      82:490      83:447    
  84:629      85:1069     86:594      87:749      88:328      89:1556   
  90:204      91:3771     92:516      93:1053     94:1279     95:817    
  96:504      97:249      98:835      99:35      101:60      103:12     
 106:1       107:7       108:85      109:950     110:601     111:715    
 112:302     113:401     114:534     115:667     116:956     117:691    
 118:821     119:1145    120:308     121:677     122:1627    123:1001   
 124:1265    125:1228    128:262     129:176     130:164     131:573    
 132:109     133:19      134:218     135:48      136:215     137:143    
 138:305     139:112     140:487     141:239     142:402     143:402    
 144:481     145:54      146:444     147:209     148:589     149:243    
 150:172     151:186     152:306     153:178     154:3       155:396    
 156:194     157:352     158:135     159:387     160:317     161:207    
 162:279     163:163     164:501     165:354     166:516     167:433    
 168:729     169:152     170:794     171:77      172:1       173:1566   
 174:551     175:374     177:128     178:918     180:844     181:17     
 182:446     183:207     184:272     185:1       186:1164    187:735    
 188:842     189:897     190:4805    192:5790    193:4854    194:3482   
 195:2982    196:1210    197:19      198:3584    199:3908    200:5540   
 201:1486    202:8357    203:8427    204:4158    205:2326    206:2730   
 207:2913    208:3964    209:3462    210:2736    211:1392    212:1972   
 213:1734    214:735     215:71      216:4899    217:1623    218:563    
 219:362     220:1200    221:483     222:336     223:148    

End of report




More information about the NANOG mailing list