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Weekly Routing Table Report
From: Routing Analysis Role Account <cscora () apnic net>
Date: Sat, 9 Apr 2011 04:39:53 +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 09 Apr, 2011

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

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

BGP routing table entries examined:                              352501
    Prefixes after maximum aggregation:                          160116
    Deaggregation factor:                                          2.20
    Unique aggregates announced to Internet:                     174726
Total ASes present in the Internet Routing Table:                 37229
    Prefixes per ASN:                                              9.47
Origin-only ASes present in the Internet Routing Table:           31242
Origin ASes announcing only one prefix:                           15033
Transit ASes present in the Internet Routing Table:                5011
Transit-only ASes present in the Internet Routing Table:            131
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:               554
    Unregistered ASNs in the Routing Table:                         244
Number of 32-bit ASNs allocated by the RIRs:                       1270
Number of 32-bit ASNs visible in the Routing Table:                 976
Prefixes from 32-bit ASNs in the Routing Table:                    2181
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            179
Number of addresses announced to Internet:                   2404831680
    Equivalent to 143 /8s, 86 /16s and 209 /24s
    Percentage of available address space announced:               64.9
    Percentage of allocated address space announced:               64.9
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               90.3
Total number of prefixes smaller than registry allocations:      145944

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

Prefixes being announced by APNIC Region ASes:                    87803
    Total APNIC prefixes after maximum aggregation:               29890
    APNIC Deaggregation factor:                                    2.94
Prefixes being announced from the APNIC address blocks:           84782
    Unique aggregates announced from the APNIC address blocks:    36887
APNIC Region origin ASes present in the Internet Routing Table:    4397
    APNIC Prefixes per ASN:                                       19.28
APNIC Region origin ASes announcing only one prefix:               1218
APNIC Region transit ASes present in the Internet Routing Table:    698
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         20
Number of APNIC region 32-bit ASNs visible in the Routing Table:     47
Number of APNIC addresses announced to Internet:              605565472
    Equivalent to 36 /8s, 24 /16s and 50 /24s
    Percentage of available APNIC address space announced:         76.8

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:                    138983
    Total ARIN prefixes after maximum aggregation:                70940
    ARIN Deaggregation factor:                                     1.96
Prefixes being announced from the ARIN address blocks:           111475
    Unique aggregates announced from the ARIN address blocks:     45128
ARIN Region origin ASes present in the Internet Routing Table:    14304
    ARIN Prefixes per ASN:                                         7.79
ARIN Region origin ASes announcing only one prefix:                5465
ARIN Region transit ASes present in the Internet Routing Table:    1487
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:               797692928
    Equivalent to 47 /8s, 139 /16s and 212 /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:                     83363
    Total RIPE prefixes after maximum aggregation:                47605
    RIPE Deaggregation factor:                                     1.75
Prefixes being announced from the RIPE address blocks:            76622
    Unique aggregates announced from the RIPE address blocks:     50561
RIPE Region origin ASes present in the Internet Routing Table:    15488
    RIPE Prefixes per ASN:                                         4.95
RIPE Region origin ASes announcing only one prefix:                7790
RIPE Region transit ASes present in the Internet Routing Table:    2419
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:     721
Number of RIPE addresses announced to Internet:               464002432
    Equivalent to 27 /8s, 168 /16s and 29 /24s
    Percentage of available RIPE address space announced:          74.7

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:                   32267
    Total LACNIC prefixes after maximum aggregation:               7402
    LACNIC Deaggregation factor:                                   4.36
Prefixes being announced from the LACNIC address blocks:          31330
    Unique aggregates announced from the LACNIC address blocks:   16335
LACNIC Region origin ASes present in the Internet Routing Table:   1434
    LACNIC Prefixes per ASN:                                      21.85
LACNIC Region origin ASes announcing only one prefix:               430
LACNIC Region transit ASes present in the Internet Routing Table:   259
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:   192
Number of LACNIC addresses announced to Internet:              81775488
    Equivalent to 4 /8s, 223 /16s and 203 /24s
    Percentage of available LACNIC address space announced:        54.2

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:                   7630
    Total AfriNIC prefixes after maximum aggregation:              1820
    AfriNIC Deaggregation factor:                                  4.19
Prefixes being announced from the AfriNIC address blocks:          6000
    Unique aggregates announced from the AfriNIC address blocks:   1858
AfriNIC Region origin ASes present in the Internet Routing Table:   442
    AfriNIC Prefixes per ASN:                                     13.57
AfriNIC Region origin ASes announcing only one prefix:              130
AfriNIC Region transit ASes present in the Internet Routing Table:   99
Average AfriNIC Region AS path length visible:                      4.6
    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:             22693120
    Equivalent to 1 /8s, 90 /16s and 69 /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     2440       9515         909   Korea Telecom (KIX)
 7545     1547        301          83   TPG Internet Pty Ltd
17974     1458        480          33   PT TELEKOMUNIKASI INDONESIA
 4755     1443        634         167   TATA Communications formerly 
24560     1137        322         203   Bharti Airtel Ltd., Telemedia
 4808     1063       2140         293   CNCGROUP IP network: China169
 9583     1055         77         494   Sify Limited
 9829     1003        867          56   BSNL National Internet Backbo
17488      942        162          98   Hathway IP Over Cable Interne
18101      935        116         139   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     3666       3822         255   bellsouth.net, inc. 
 4323     2541       1090         396   Time Warner Telecom
 1785     1791        681         131   PaeTec Communications, Inc.
18566     1642        335         197   Covad Communications 
 6478     1607        305          36   AT&T Worldnet Services 
20115     1536       1551         641   Charter Communications 
19262     1494       4949         297   Verizon Global Networks 
 7018     1354       6801         880   AT&T WorldNet Services
22773     1294       2865          84   Cox Communications, Inc.
 2386     1281        538         924   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         319   UPC Distribution Services
34984      495         97         188   BILISIM TELEKOM
29049      463         34          34   AzerSat LLC.
 3292      455       2013         392   TDC Tele Danmark
 8866      446        134          26   Bulgarian Telecommunication C
20940      441        127         338   Akamai Technologies European 
 3320      419       7607         365   Deutsche Telekom AG
 8551      403        353          46   Bezeq International
12479      403        577           6   Uni2 Autonomous System
  702      394       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     1417        263         156   TVCABLE BOGOTA 
28573     1271        972          86   NET Servicos de Comunicao S.A
 8151     1241       2679         367   UniNet S.A. de C.V. 
 6503     1112        354          72   AVANTEL, S.A. 
 7303      900        464         136   Telecom Argentina Stet-France
14420      645         52          89   CORPORACION NACIONAL DE TELEC
22047      567        310          15   VTR PUNTO NET S.A. 
 3816      514        225          98   Empresa Nacional de Telecomun
11172      487         99          81   Servicios Alestra S.A de C.V 
27947      481         53          54   Telconet S.A

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      839        445          11   TEDATA
24863      771        147          37   LINKdotNET AS number
15475      420         90           8   Nile Online
36992      295        287          12   Etisalat MISR
 3741      266        985         227   The Internet Solution 
24835      232         78          10   RAYA Telecom - Egypt
 6713      231        215          12   Itissalat Al-MAGHRIB
33776      210         13           5   Starcomms Nigeria Limited
29571      191         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     3666       3822         255   bellsouth.net, inc. 
 4323     2541       1090         396   Time Warner Telecom
 4766     2440       9515         909   Korea Telecom (KIX)
23456     2181        634        1179   32-bit ASN transition
 1785     1791        681         131   PaeTec Communications, Inc.
18566     1642        335         197   Covad Communications 
 6478     1607        305          36   AT&T Worldnet Services 
 7545     1547        301          83   TPG Internet Pty Ltd
20115     1536       1551         641   Charter Communications 
19262     1494       4949         297   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      2541        2145      Time Warner Telecom
 1785      1791        1660      PaeTec Communications, Inc.
 6478      1607        1571      AT&T Worldnet Services 
 4766      2440        1531      Korea Telecom (KIX)
 7545      1547        1464      TPG Internet Pty Ltd
18566      1642        1445      Covad Communications 
17974      1458        1425      PT TELEKOMUNIKASI INDONESIA
 4755      1443        1276      TATA Communications formerly 
10620      1417        1261      TVCABLE BOGOTA 
11492      1267        1252      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
1.3.0.0/16           38639     NTT Communications Corporatio
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
31.3.80.0/21         23456     32-bit ASN transition
31.3.96.0/21         35470     XL Network

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       /9:12      /10:26      /11:74      /12:219     
/13:448     /14:770     /15:1373    /16:11583   /17:5730    /18:9448    
/19:19121   /20:25018   /21:25421   /22:33575   /23:32209   /24:184373  
/25:1096    /26:1257    /27:683     /28:30      /29:8       /30:2       
/31:0       /32:6       

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

  ASN   No of nets  Total ann.   Description
 6389     2263          3666      bellsouth.net, inc. 
18566     1620          1642      Covad Communications 
 6478     1561          1607      AT&T Worldnet Services 
 4323     1362          2541      Time Warner Telecom
10620     1307          1417      TVCABLE BOGOTA 
11492     1216          1267      Cable One 
23456     1127          2181      32-bit ASN transition
 7011     1061          1161      Citizens Utilities 
 1785     1057          1791      PaeTec Communications, Inc.
 6503      897          1112      AVANTEL, S.A. 

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

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

   1:296       2:55        4:14        5:1         8:350      12:2004   
  13:1        14:434      15:15       16:3        17:8        20:9      
  23:5        24:1601     27:702      31:213      32:60       33:3      
  34:2        37:1        38:752      39:1        40:101      41:2371   
  42:1        44:3        46:793      47:4        49:171      50:219    
  52:13       55:4        56:2        57:27       58:845      59:489    
  60:387      61:1164     62:1002     63:1921     64:3893     65:2336   
  66:4312     67:1805     68:1080     69:2934     70:702      71:343    
  72:1900     73:1        74:2327     75:284      76:336      77:852    
  78:688      79:458      80:1087     81:822      82:508      83:458    
  84:648      85:1041     86:556      87:761      88:340      89:1584   
  90:178      91:3678     92:497      93:1046     94:1258     95:776    
  96:448      97:252      98:821      99:35      101:61      106:2      
 107:4       108:78      109:936     110:531     111:679     112:324    
 113:385     114:511     115:700     116:932     117:674     118:774    
 119:1137    120:289     121:712     122:1621    123:1055    124:1282   
 125:1258    128:265     129:167     130:172     131:565     132:100    
 133:20      134:216     135:49      136:212     137:142     138:301    
 139:104     140:486     141:173     142:377     143:388     144:480    
 145:53      146:441     147:202     148:629     149:273     150:169    
 151:187     152:300     153:180     154:3       155:392     156:189    
 157:325     158:132     159:381     160:317     161:242     162:277    
 163:164     164:489     165:350     166:510     167:418     168:723    
 169:154     170:774     171:74      172:1       173:1257    174:535    
 175:349     177:77      178:834     180:806     181:7       182:416    
 183:200     184:240     185:1       186:1124    187:914     188:933    
 189:1041    190:4810    192:5776    193:4808    194:3471    195:2948   
 196:1206    197:17      198:3577    199:3906    200:5546    201:1474   
 202:8377    203:8466    204:4128    205:2323    206:2648    207:2999   
 208:3920    209:3505    210:2722    211:1365    212:1978    213:1717   
 214:732     215:66      216:4867    217:1640    218:556     219:386    
 220:1193    221:480     222:312     223:117    

End of report


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