Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Mar 25 13:38:39 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 26 Mar, 2011

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

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

BGP routing table entries examined:                              351425
    Prefixes after maximum aggregation:                          159549
    Deaggregation factor:                                          2.20
    Unique aggregates announced to Internet:                     173538
Total ASes present in the Internet Routing Table:                 37074
    Prefixes per ASN:                                              9.48
Origin-only ASes present in the Internet Routing Table:           31157
Origin ASes announcing only one prefix:                           14986
Transit ASes present in the Internet Routing Table:                4992
Transit-only ASes present in the Internet Routing Table:            129
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      31
    Max AS path prepend of ASN (36992)                               29
Prefixes from unregistered ASNs in the Routing Table:               451
    Unregistered ASNs in the Routing Table:                         217
Number of 32-bit ASNs allocated by the RIRs:                       1230
Number of 32-bit ASNs visible in the Routing Table:                 925
Prefixes from 32-bit ASNs in the Routing Table:                    2001
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            191
Number of addresses announced to Internet:                   2390772288
    Equivalent to 142 /8s, 128 /16s and 74 /24s
    Percentage of available address space announced:               64.5
    Percentage of allocated address space announced:               64.5
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               89.6
Total number of prefixes smaller than registry allocations:      145378

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

Prefixes being announced by APNIC Region ASes:                    87775
    Total APNIC prefixes after maximum aggregation:               29913
    APNIC Deaggregation factor:                                    2.93
Prefixes being announced from the APNIC address blocks:           84659
    Unique aggregates announced from the APNIC address blocks:    36676
APNIC Region origin ASes present in the Internet Routing Table:    4370
    APNIC Prefixes per ASN:                                       19.37
APNIC Region origin ASes announcing only one prefix:               1214
APNIC Region transit ASes present in the Internet Routing Table:    692
Average APNIC Region AS path length visible:                        4.4
    Max APNIC Region AS path length visible:                         20
Number of APNIC region 32-bit ASNs visible in the Routing Table:     45
Number of APNIC addresses announced to Internet:              600588608
    Equivalent to 35 /8s, 204 /16s and 65 /24s
    Percentage of available APNIC address space announced:         76.2

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:                    138605
    Total ARIN prefixes after maximum aggregation:                70811
    ARIN Deaggregation factor:                                     1.96
Prefixes being announced from the ARIN address blocks:           111045
    Unique aggregates announced from the ARIN address blocks:     44885
ARIN Region origin ASes present in the Internet Routing Table:    14277
    ARIN Prefixes per ASN:                                         7.78
ARIN Region origin ASes announcing only one prefix:                5432
ARIN Region transit ASes present in the Internet Routing Table:    1472
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:      10
Number of ARIN addresses announced to Internet:               797226496
    Equivalent to 47 /8s, 132 /16s and 182 /24s
    Percentage of available ARIN address space announced:          63.4

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:                     82875
    Total RIPE prefixes after maximum aggregation:                47359
    RIPE Deaggregation factor:                                     1.75
Prefixes being announced from the RIPE address blocks:            76234
    Unique aggregates announced from the RIPE address blocks:     50044
RIPE Region origin ASes present in the Internet Routing Table:    15444
    RIPE Prefixes per ASN:                                         4.94
RIPE Region origin ASes announcing only one prefix:                7777
RIPE Region transit ASes present in the Internet Routing Table:    2412
Average RIPE Region AS path length visible:                         4.6
    Max RIPE Region AS path length visible:                          30
Number of RIPE region 32-bit ASNs visible in the Routing Table:     684
Number of RIPE addresses announced to Internet:               465041152
    Equivalent to 27 /8s, 183 /16s and 247 /24s
    Percentage of available RIPE address space announced:          74.9

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:                   32341
    Total LACNIC prefixes after maximum aggregation:               7367
    LACNIC Deaggregation factor:                                   4.39
Prefixes being announced from the LACNIC address blocks:          31251
    Unique aggregates announced from the LACNIC address blocks:   16237
LACNIC Region origin ASes present in the Internet Routing Table:   1436
    LACNIC Prefixes per ASN:                                      21.76
LACNIC Region origin ASes announcing only one prefix:               434
LACNIC Region transit ASes present in the Internet Routing Table:   265
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:   181
Number of LACNIC addresses announced to Internet:              81456768
    Equivalent to 4 /8s, 218 /16s and 238 /24s
    Percentage of available LACNIC address space announced:        53.9

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:                   7620
    Total AfriNIC prefixes after maximum aggregation:              1814
    AfriNIC Deaggregation factor:                                  4.20
Prefixes being announced from the AfriNIC address blocks:          5993
    Unique aggregates announced from the AfriNIC address blocks:   1854
AfriNIC Region origin ASes present in the Internet Routing Table:   437
    AfriNIC Prefixes per ASN:                                     13.71
AfriNIC Region origin ASes announcing only one prefix:              129
AfriNIC Region transit ASes present in the Internet Routing Table:   95
Average AfriNIC Region AS path length visible:                      5.3
    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:             22659584
    Equivalent to 1 /8s, 89 /16s and 194 /24s
    Percentage of available AfriNIC address space announced:       33.8

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     2409       9509         896   Korea Telecom (KIX)
 7545     1553        301          83   TPG Internet Pty Ltd
 4755     1481        653         159   TATA Communications formerly 
17974     1455        480          33   PT TELEKOMUNIKASI INDONESIA
24560     1130        321         203   Bharti Airtel Ltd., Telemedia
 9583     1055         77         493   Sify Limited
 4808     1026       2096         294   CNCGROUP IP network: China169
 9829     1004        868          53   BSNL National Internet Backbo
18101      938        116         142   Reliance Infocom Ltd Internet
17488      935        162          98   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     3673       3838         257   bellsouth.net, inc. 
 4323     2566       1093         401   Time Warner Telecom
 1785     1786        681         131   PaeTec Communications, Inc.
18566     1606        331         195   Covad Communications 
 6478     1571        302          36   AT&T Worldnet Services 
20115     1530       1540         650   Charter Communications 
19262     1487       4935         303   Verizon Global Networks 
 7018     1357       6675         883   AT&T WorldNet Services
11492     1325        240          15   Cable One 
22773     1285       2865          79   Cox Communications, Inc.

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      515       1780         318   UPC Distribution Services
 3292      454       2013         391   TDC Tele Danmark
34984      454         95         205   BILISIM TELEKOM
 8866      443        133          24   Bulgarian Telecommunication C
 9198      422        267          15   Kazakhtelecom Data Network Ad
 3320      412       7604         359   Deutsche Telekom AG
20940      411         98         317   Akamai Technologies European 
 8551      402        353          46   Bezeq International
12479      397        577           6   Uni2 Autonomous System
  702      393       1800         307   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     1401        261         153   TVCABLE BOGOTA 
28573     1248        970          83   NET Servicos de Comunicao S.A
 8151     1236       2671         366   UniNet S.A. de C.V. 
 6503     1221        354          73   AVANTEL, S.A. 
 7303      923        465         148   Telecom Argentina Stet-France
14420      638         52          91   CORPORACION NACIONAL DE TELEC
22047      567        310          15   VTR PUNTO NET S.A. 
 3816      515        225          98   Empresa Nacional de Telecomun
13489      490        213         111   Orbitel S.A. E.S.P. 
11172      487         83          80   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      843        445          11   TEDATA
24863      774        147          39   LINKdotNET AS number
15475      421         90           8   Nile Online
36992      298        271          14   Etisalat MISR
 3741      265        985         227   The Internet Solution 
24835      232         78          10   RAYA Telecom - Egypt
33776      230         13           5   Starcomms Nigeria Limited
 6713      211        199          11   Itissalat Al-MAGHRIB
29571      192         17          11   Ci Telecom Autonomous system 
16637      148        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     3673       3838         257   bellsouth.net, inc. 
 4323     2566       1093         401   Time Warner Telecom
 4766     2409       9509         896   Korea Telecom (KIX)
23456     2001        489        1093   32-bit ASN transition
 1785     1786        681         131   PaeTec Communications, Inc.
18566     1606        331         195   Covad Communications 
 6478     1571        302          36   AT&T Worldnet Services 
 7545     1553        301          83   TPG Internet Pty Ltd
20115     1530       1540         650   Charter Communications 
19262     1487       4935         303   Verizon Global Networks 

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      2566        2165      Time Warner Telecom
 1785      1786        1655      PaeTec Communications, Inc.
 6478      1571        1535      AT&T Worldnet Services 
 4766      2409        1513      Korea Telecom (KIX)
 7545      1553        1470      TPG Internet Pty Ltd
17974      1455        1422      PT TELEKOMUNIKASI INDONESIA
18566      1606        1411      Covad Communications 
 4755      1481        1322      TATA Communications formerly 
11492      1325        1310      Cable One 
10620      1401        1248      TVCABLE BOGOTA 

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
2.56.0.0/16          44559     E-Rent LLC
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
31.186.112.0/21       8681     Jersey Telecoms Island Networ
31.186.160.0/21      35467     DataCenter Fryslan AS
41.57.192.0/18       22750     BCSNET

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        /8:19       /9:11      /10:26      /11:74      /12:218     
/13:448     /14:766     /15:1370    /16:11586   /17:5699    /18:9423    
/19:19078   /20:24728   /21:25237   /22:33660   /23:32188   /24:183717  
/25:1131    /26:1289    /27:700     /28:40      /29:9       /30:2       
/31:0       /32:6       

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

  ASN   No of nets  Total ann.   Description
 6389     2267          3673      bellsouth.net, inc. 
18566     1585          1606      Covad Communications 
 6478     1525          1571      AT&T Worldnet Services 
 4323     1377          2566      Time Warner Telecom
10620     1292          1401      TVCABLE BOGOTA 
11492     1273          1325      Cable One 
23456     1085          2001      32-bit ASN transition
 7011     1063          1164      Citizens Utilities 
 1785     1056          1786      PaeTec Communications, Inc.
 6503      997          1221      AVANTEL, S.A. 

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

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

   1:288       2:54        4:14        5:1         8:346      12:2020   
  13:1        14:429      15:15       16:3        17:8        20:9      
  23:3        24:1571     27:699      31:14       32:60       33:3      
  34:2        37:1        38:749      39:1        40:101      41:2367   
  44:3        46:750      47:4        49:146      50:119      52:13     
  55:5        56:2        57:30       58:817      59:500      60:387    
  61:1167     62:1005     63:1919     64:3881     65:2354     66:4375   
  67:1799     68:1061     69:2912     70:701      71:359      72:1900   
  73:1        74:2327     75:284      76:337      77:842      78:696    
  79:455      80:1087     81:826      82:511      83:463      84:647    
  85:1027     86:553      87:760      88:343      89:1567     90:176    
  91:3657     92:504      93:1044     94:1228     95:776      96:452    
  97:251      98:809      99:35      101:49      106:1       107:4      
 108:47      109:925     110:517     111:703     112:325     113:378    
 114:511     115:720     116:972     117:672     118:758     119:1096   
 120:281     121:760     122:1607    123:1059    124:1323    125:1256   
 128:234     129:171     130:173     131:564     132:101     133:20     
 134:216     135:49      136:212     137:142     138:299     139:112    
 140:485     141:173     142:380     143:391     144:476     145:52     
 146:440     147:192     148:634     149:271     150:167     151:187    
 152:298     153:180     154:3       155:389     156:185     157:347    
 158:131     159:377     160:313     161:208     162:278     163:165    
 164:493     165:350     166:501     167:413     168:721     169:155    
 170:776     171:70      172:2       173:1256    174:529     175:350    
 177:66      178:756     180:791     181:4       182:411     183:239    
 184:230     185:1       186:1106    187:899     188:918     189:1027   
 190:4732    192:5768    193:4788    194:3487    195:2939    196:1212   
 197:15      198:3591    199:3885    200:5581    201:1585    202:8395   
 203:8458    204:4114    205:2313    206:2647    207:3025    208:3907   
 209:3496    210:2725    211:1363    212:1953    213:1712    214:761    
 215:66      216:4881    217:1621    218:556     219:382     220:1192   
 221:478     222:317     223:103    

End of report




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