Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Mar 18 13:38:03 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 19 Mar, 2011

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

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

BGP routing table entries examined:                              350396
    Prefixes after maximum aggregation:                          158064
    Deaggregation factor:                                          2.22
    Unique aggregates announced to Internet:                     173325
Total ASes present in the Internet Routing Table:                 36104
    Prefixes per ASN:                                              9.71
Origin-only ASes present in the Internet Routing Table:           31128
Origin ASes announcing only one prefix:                           14967
Transit ASes present in the Internet Routing Table:                4976
Transit-only ASes present in the Internet Routing Table:            126
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:               419
    Unregistered ASNs in the Routing Table:                         197
Number of 32-bit ASNs allocated by the RIRs:                       1207
Prefixes from 32-bit ASNs in the Routing Table:                       1
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            195
Number of addresses announced to Internet:                   2389006912
    Equivalent to 142 /8s, 101 /16s and 90 /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:               89.5
Total number of prefixes smaller than registry allocations:      145036

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

Prefixes being announced by APNIC Region ASes:                    87454
    Total APNIC prefixes after maximum aggregation:               29725
    APNIC Deaggregation factor:                                    2.94
Prefixes being announced from the APNIC address blocks:           84332
    Unique aggregates announced from the APNIC address blocks:    36512
APNIC Region origin ASes present in the Internet Routing Table:    4355
    APNIC Prefixes per ASN:                                       19.36
APNIC Region origin ASes announcing only one prefix:               1209
APNIC Region transit ASes present in the Internet Routing Table:    688
Average APNIC Region AS path length visible:                        4.4
    Max APNIC Region AS path length visible:                         20
Number of APNIC addresses announced to Internet:              599437120
    Equivalent to 35 /8s, 186 /16s and 175 /24s
    Percentage of available APNIC address space announced:         76.0

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:                    140255
    Total ARIN prefixes after maximum aggregation:                71845
    ARIN Deaggregation factor:                                     1.95
Prefixes being announced from the ARIN address blocks:           110784
    Unique aggregates announced from the ARIN address blocks:     45089
ARIN Region origin ASes present in the Internet Routing Table:    14268
    ARIN Prefixes per ASN:                                         7.76
ARIN Region origin ASes announcing only one prefix:                5424
ARIN Region transit ASes present in the Internet Routing Table:    1481
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          23
Number of ARIN addresses announced to Internet:               796960256
    Equivalent to 47 /8s, 128 /16s and 166 /24s
    Percentage of available ARIN address space announced:          63.3

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:                     82861
    Total RIPE prefixes after maximum aggregation:                47241
    RIPE Deaggregation factor:                                     1.75
Prefixes being announced from the RIPE address blocks:            76228
    Unique aggregates announced from the RIPE address blocks:     49953
RIPE Region origin ASes present in the Internet Routing Table:    15431
    RIPE Prefixes per ASN:                                         4.94
RIPE Region origin ASes announcing only one prefix:                7778
RIPE Region transit ASes present in the Internet Routing Table:    2398
Average RIPE Region AS path length visible:                         4.6
    Max RIPE Region AS path length visible:                          30
Number of RIPE addresses announced to Internet:               465167872
    Equivalent to 27 /8s, 185 /16s and 230 /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:                   32138
    Total LACNIC prefixes after maximum aggregation:               7344
    LACNIC Deaggregation factor:                                   4.38
Prefixes being announced from the LACNIC address blocks:          31063
    Unique aggregates announced from the LACNIC address blocks:   16158
LACNIC Region origin ASes present in the Internet Routing Table:   1433
    LACNIC Prefixes per ASN:                                      21.68
LACNIC Region origin ASes announcing only one prefix:               428
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:                        18
Number of LACNIC addresses announced to Internet:              81506688
    Equivalent to 4 /8s, 219 /16s and 177 /24s
    Percentage of available LACNIC address space announced:        54.0

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:                   7476
    Total AfriNIC prefixes after maximum aggregation:              1806
    AfriNIC Deaggregation factor:                                  4.14
Prefixes being announced from the AfriNIC address blocks:          5882
    Unique aggregates announced from the AfriNIC address blocks:   1800
AfriNIC Region origin ASes present in the Internet Routing Table:   434
    AfriNIC Prefixes per ASN:                                     13.55
AfriNIC Region origin ASes announcing only one prefix:              127
AfriNIC Region transit ASes present in the Internet Routing Table:   93
Average AfriNIC Region AS path length visible:                      5.4
    Max AfriNIC Region AS path length visible:                       31
Number of AfriNIC addresses announced to Internet:             22062080
    Equivalent to 1 /8s, 80 /16s and 164 /24s
    Percentage of available AfriNIC address space announced:       32.9

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     2426       9508         896   Korea Telecom (KIX)
 7545     1569        301          84   TPG Internet Pty Ltd
 4755     1476        653         158   TATA Communications formerly 
17974     1443        480          34   PT TELEKOMUNIKASI INDONESIA
24560     1134        324         187   Bharti Airtel Ltd., Telemedia
 9583     1047         77         490   Sify Limited
 4808     1046       2142         294   CNCGROUP IP network: China169
 9829     1004        868          53   BSNL National Internet Backbo
18101      939        117         143   Reliance Infocom Ltd Internet
17488      936        162          96   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     3675       3839         259   bellsouth.net, inc. 
 4323     2569       1093         402   Time Warner Telecom
 1785     1792        681         131   PaeTec Communications, Inc.
18566     1606        331         194   Covad Communications 
 6478     1551        300          76   AT&T Worldnet Services 
20115     1527       1536         645   Charter Communications 
19262     1488       4939         299   Verizon Global Networks 
 7018     1368       6835         887   AT&T WorldNet Services
11492     1314        236          64   Cable One 
 2386     1289        536         929   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      515       1780         318   UPC Distribution Services
 9198      472        267          15   Kazakhtelecom Data Network Ad
34984      455         95         203   BILISIM TELEKOM
 3292      453       2013         391   TDC Tele Danmark
 8866      443        133          24   Bulgarian Telecommunication C
20940      411         98         314   Akamai Technologies European 
 3320      406       7604         354   Deutsche Telekom AG
 8551      403        353          46   Bezeq International
12479      403        577           6   Uni2 Autonomous System
 8402      398        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     1392        259         163   TVCABLE BOGOTA 
28573     1243        965          82   NET Servicos de Comunicao S.A
 8151     1238       2702         368   UniNet S.A. de C.V. 
 6503     1175        354          73   AVANTEL, S.A. 
 7303      923        464         147   Telecom Argentina Stet-France
14420      639         52          91   CORPORACION NACIONAL DE TELEC
22047      543        310          15   VTR PUNTO NET S.A. 
 3816      513        225          97   Empresa Nacional de Telecomun
13489      491        213         106   Orbitel S.A. E.S.P. 
11172      487         99          81   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      791        445          11   TEDATA
24863      773        147          39   LINKdotNET AS number
15475      420         90           8   Nile Online
36992      297        271          14   Etisalat MISR
 3741      266        987         228   The Internet Solution 
33776      230         13           5   Starcomms Nigeria Limited
24835      220         78          10   RAYA Telecom - Egypt
 6713      207        199          11   Itissalat Al-MAGHRIB
29571      192         17          11   Ci Telecom Autonomous system 
16637      147        439          87   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     3675       3839         259   bellsouth.net, inc. 
 4323     2569       1093         402   Time Warner Telecom
 4766     2426       9508         896   Korea Telecom (KIX)
 1785     1792        681         131   PaeTec Communications, Inc.
18566     1606        331         194   Covad Communications 
 7545     1569        301          84   TPG Internet Pty Ltd
 6478     1551        300          76   AT&T Worldnet Services 
20115     1527       1536         645   Charter Communications 
19262     1488       4939         299   Verizon Global Networks 
 4755     1476        653         158   TATA Communications formerly 

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      2569        2167      Time Warner Telecom
 1785      1792        1661      PaeTec Communications, Inc.
 4766      2426        1530      Korea Telecom (KIX)
 7545      1569        1485      TPG Internet Pty Ltd
 6478      1551        1475      AT&T Worldnet Services 
18566      1606        1412      Covad Communications 
17974      1443        1409      PT TELEKOMUNIKASI INDONESIA
 4755      1476        1318      TATA Communications formerly 
11492      1314        1250      Cable One 
10620      1392        1229      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
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
31.31.96.0/19         6876     TeNeT Autonomous System
31.31.160.0/21       50168     Bogal AB
41.57.192.0/18       22750     BCSNET
41.222.79.0/24       36938     >>UNKNOWN<<

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      /12:217     
/13:447     /14:767     /15:1373    /16:11566   /17:5690    /18:9398    
/19:19019   /20:24711   /21:25164   /22:33584   /23:32079   /24:183044  
/25:1126    /26:1302    /27:722     /28:40      /29:9       /30:2       
/31:0       /32:6       

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

  ASN   No of nets  Total ann.   Description
 6389     2268          3675      bellsouth.net, inc. 
18566     1585          1606      Covad Communications 
 6478     1505          1551      AT&T Worldnet Services 
 4323     1380          2569      Time Warner Telecom
10620     1283          1392      TVCABLE BOGOTA 
11492     1271          1314      Cable One 
 7011     1062          1162      Citizens Utilities 
 1785     1057          1792      PaeTec Communications, Inc.
 6503      955          1175      AVANTEL, S.A. 
22773      835          1287      Cox Communications, Inc.

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

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

   1:272       2:61        4:14        5:1         8:342      12:2021   
  13:1        14:422      15:15       16:3        17:8        20:10     
  23:3        24:1558     27:654      31:2        32:60       33:3      
  34:2        37:1        38:714      39:1        40:101      41:2279   
  44:3        46:731      47:4        49:162      50:109      52:13     
  55:3        56:2        57:32       58:866      59:492      60:386    
  61:1149     62:997      63:1926     64:3873     65:2353     66:4367   
  67:1771     68:1076     69:2905     70:698      71:359      72:1935   
  73:1        74:2325     75:284      76:343      77:844      78:697    
  79:453      80:1091     81:817      82:515      83:466      84:645    
  85:1042     86:554      87:756      88:353      89:1565     90:174    
  91:3642     92:504      93:1042     94:1226     95:782      96:448    
  97:251      98:799      99:34      101:49      106:1       107:4      
 108:72      109:908     110:520     111:715     112:320     113:374    
 114:504     115:713     116:968     117:674     118:723     119:1077   
 120:257     121:767     122:1609    123:1042    124:1300    125:1248   
 128:265     129:170     130:172     131:551     132:100     133:20     
 134:215     135:49      136:212     137:145     138:299     139:113    
 140:479     141:173     142:377     143:382     144:473     145:52     
 146:436     147:208     148:615     149:275     150:161     151:187    
 152:298     153:180     154:3       155:375     156:185     157:348    
 158:127     159:372     160:313     161:212     162:278     163:164    
 164:489     165:351     166:499     167:411     168:722     169:156    
 170:761     171:69      172:2       173:1250    174:522     175:333    
 177:43      178:810     180:791     181:4       182:398     183:245    
 184:228     185:1       186:1056    187:865     188:914     189:1031   
 190:4750    192:5768    193:4792    194:3494    195:2945    196:1178   
 197:15      198:3566    199:3873    200:5523    201:1586    202:8392   
 203:8467    204:4111    205:2310    206:2642    207:3025    208:3902   
 209:3486    210:2676    211:1352    212:1947    213:1702    214:756    
 215:66      216:4861    217:1647    218:550     219:381     220:1195   
 221:472     222:321     223:100    

End of report




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