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Weekly Routing Table Report
From: Routing Analysis Role Account <cscora () apnic net>
Date: Sat, 23 Apr 2011 04:59:56 +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 23 Apr, 2011

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

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

BGP routing table entries examined:                              355581
    Prefixes after maximum aggregation:                          160822
    Deaggregation factor:                                          2.21
    Unique aggregates announced to Internet:                     175365
Total ASes present in the Internet Routing Table:                 37371
    Prefixes per ASN:                                              9.51
Origin-only ASes present in the Internet Routing Table:           31313
Origin ASes announcing only one prefix:                           15071
Transit ASes present in the Internet Routing Table:                5046
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 (36992)                               29
Prefixes from unregistered ASNs in the Routing Table:               564
    Unregistered ASNs in the Routing Table:                         275
Number of 32-bit ASNs allocated by the RIRs:                       1309
Number of 32-bit ASNs visible in the Routing Table:                1012
Prefixes from 32-bit ASNs in the Routing Table:                    2274
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            161
Number of addresses announced to Internet:                   2418199616
    Equivalent to 144 /8s, 34 /16s and 204 /24s
    Percentage of available address space announced:               65.2
    Percentage of allocated address space announced:               65.2
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               90.5
Total number of prefixes smaller than registry allocations:      147668

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

Prefixes being announced by APNIC Region ASes:                    88888
    Total APNIC prefixes after maximum aggregation:               29965
    APNIC Deaggregation factor:                                    2.97
Prefixes being announced from the APNIC address blocks:           85376
    Unique aggregates announced from the APNIC address blocks:    36841
APNIC Region origin ASes present in the Internet Routing Table:    4419
    APNIC Prefixes per ASN:                                       19.32
APNIC Region origin ASes announcing only one prefix:               1226
APNIC Region transit ASes present in the Internet Routing Table:    700
Average APNIC Region AS path length visible:                        4.6
    Max APNIC Region AS path length visible:                         22
Number of APNIC region 32-bit ASNs visible in the Routing Table:     48
Number of APNIC addresses announced to Internet:              610706464
    Equivalent to 36 /8s, 102 /16s and 164 /24s
    Percentage of available APNIC address space announced:         77.4

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:                    140032
    Total ARIN prefixes after maximum aggregation:                71172
    ARIN Deaggregation factor:                                     1.97
Prefixes being announced from the ARIN address blocks:           112430
    Unique aggregates announced from the ARIN address blocks:     45157
ARIN Region origin ASes present in the Internet Routing Table:    14334
    ARIN Prefixes per ASN:                                         7.84
ARIN Region origin ASes announcing only one prefix:                5473
ARIN Region transit ASes present in the Internet Routing Table:    1492
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:               798645760
    Equivalent to 47 /8s, 154 /16s and 94 /24s
    Percentage of available ARIN address space announced:          63.5

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:                     84022
    Total RIPE prefixes after maximum aggregation:                47852
    RIPE Deaggregation factor:                                     1.76
Prefixes being announced from the RIPE address blocks:            77130
    Unique aggregates announced from the RIPE address blocks:     51011
RIPE Region origin ASes present in the Internet Routing Table:    15538
    RIPE Prefixes per ASN:                                         4.96
RIPE Region origin ASes announcing only one prefix:                7807
RIPE Region transit ASes present in the Internet Routing Table:    2435
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:     749
Number of RIPE addresses announced to Internet:               466814464
    Equivalent to 27 /8s, 211 /16s and 6 /24s
    Percentage of available RIPE address space announced:          75.2

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:                   32482
    Total LACNIC prefixes after maximum aggregation:               7448
    LACNIC Deaggregation factor:                                   4.36
Prefixes being announced from the LACNIC address blocks:          31486
    Unique aggregates announced from the LACNIC address blocks:   16475
LACNIC Region origin ASes present in the Internet Routing Table:   1439
    LACNIC Prefixes per ASN:                                      21.88
LACNIC Region origin ASes announcing only one prefix:               432
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:                        19
Number of LACNIC region 32-bit ASNs visible in the Routing Table:   199
Number of LACNIC addresses announced to Internet:              82681984
    Equivalent to 4 /8s, 237 /16s and 160 /24s
    Percentage of available LACNIC address space announced:        54.8

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:                   7658
    Total AfriNIC prefixes after maximum aggregation:              1822
    AfriNIC Deaggregation factor:                                  4.20
Prefixes being announced from the AfriNIC address blocks:          6067
    Unique aggregates announced from the AfriNIC address blocks:   1881
AfriNIC Region origin ASes present in the Internet Routing Table:   441
    AfriNIC Prefixes per ASN:                                     13.76
AfriNIC Region origin ASes announcing only one prefix:              133
AfriNIC Region transit ASes present in the Internet Routing Table:   95
Average AfriNIC Region AS path length visible:                      4.7
    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:             23300352
    Equivalent to 1 /8s, 99 /16s and 137 /24s
    Percentage of available AfriNIC address space announced:       34.7

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     2430       9482         904   Korea Telecom (KIX)
17974     1798        515          29   PT TELEKOMUNIKASI INDONESIA
 7545     1549        300          81   TPG Internet Pty Ltd
 4755     1454        634         167   TATA Communications formerly 
 7552     1195       1064           7   Vietel Corporation
24560     1140        323         204   Bharti Airtel Ltd., Telemedia
 9583     1054         77         495   Sify Limited
 4808     1030       2097         293   CNCGROUP IP network: China169
 9829     1008        870          50   BSNL National Internet Backbo
17488      942        164          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     3652       3822         255   bellsouth.net, inc. 
 4323     2649       1090         398   Time Warner Telecom
 1785     1789        681         128   PaeTec Communications, Inc.
18566     1760        349         229   Covad Communications 
 6478     1636        309          43   AT&T Worldnet Services 
20115     1535       1552         638   Charter Communications 
19262     1495       4949         298   Verizon Global Networks 
 7018     1357       6801         886   AT&T WorldNet Services
22773     1299       2865          84   Cox Communications, Inc.
 2386     1270        536         912   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         182   BILISIM TELEKOM
 3292      455       1997         391   TDC Tele Danmark
29049      450         33          48   AzerSat LLC.
 8866      446        134          26   Bulgarian Telecommunication C
20940      439        129         335   Akamai Technologies European 
 3320      423       7609         368   Deutsche Telekom AG
12479      409        577           6   Uni2 Autonomous System
 8551      405        354          47   Bezeq International
  702      396       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     1437        268         160   TVCABLE BOGOTA 
28573     1281        988          87   NET Servicos de Comunicao S.A
 8151     1248       2688         369   UniNet S.A. de C.V. 
 7303      927        467         149   Telecom Argentina Stet-France
 6503      907        354          72   AVANTEL, S.A. 
14420      663         53          91   CORPORACION NACIONAL DE TELEC
22047      565        310          15   VTR PUNTO NET S.A. 
 3816      516        225          98   Empresa Nacional de Telecomun
11172      488         99          82   Servicios Alestra S.A de C.V 
27947      483         53          53   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      836        445          11   TEDATA
24863      778        147          39   LINKdotNET AS number
15475      422         90           8   Nile Online
36992      297        415          13   Etisalat MISR
 3741      267        985         227   The Internet Solution 
 6713      238        215          13   Itissalat Al-MAGHRIB
33776      227         13           5   Starcomms Nigeria Limited
24835      209         78          10   RAYA Telecom - Egypt
29571      161         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     3652       3822         255   bellsouth.net, inc. 
 4323     2649       1090         398   Time Warner Telecom
 4766     2430       9482         904   Korea Telecom (KIX)
23456     2274        652        1233   32-bit ASN transition
17974     1798        515          29   PT TELEKOMUNIKASI INDONESIA
 1785     1789        681         128   PaeTec Communications, Inc.
18566     1760        349         229   Covad Communications 
 6478     1636        309          43   AT&T Worldnet Services 
 7545     1549        300          81   TPG Internet Pty Ltd
20115     1535       1552         638   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      2649        2251      Time Warner Telecom
17974      1798        1769      PT TELEKOMUNIKASI INDONESIA
 1785      1789        1661      PaeTec Communications, Inc.
 6478      1636        1593      AT&T Worldnet Services 
18566      1760        1531      Covad Communications 
 4766      2430        1526      Korea Telecom (KIX)
 7545      1549        1468      TPG Internet Pty Ltd
 4755      1454        1287      TATA Communications formerly 
10620      1437        1277      TVCABLE BOGOTA 
11492      1254        1239      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
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
31.192.112.0/20      30361     Swiftwill Solutions 
31.192.128.0/19      31214     TIS-DIALOG Autonomous system
31.192.232.0/23      47271     CJSC "Uralunicom"
31.192.232.0/22      47271     CJSC "Uralunicom"

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      /11:77      /12:221     
/13:458     /14:786     /15:1379    /16:11668   /17:5741    /18:9624    
/19:19173   /20:25618   /21:25611   /22:33775   /23:32642   /24:185589  
/25:1120    /26:1285    /27:700     /28:38      /29:8       /30:2       
/31:0       /32:6       

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

  ASN   No of nets  Total ann.   Description
 6389     2253          3652      bellsouth.net, inc. 
18566     1728          1760      Covad Communications 
 6478     1590          1636      AT&T Worldnet Services 
 4323     1346          2649      Time Warner Telecom
10620     1327          1437      TVCABLE BOGOTA 
11492     1203          1254      Cable One 
23456     1146          2274      32-bit ASN transition
 7011     1062          1161      Citizens Utilities 
 1785     1059          1789      PaeTec Communications, Inc.
22773      843          1299      Cox Communications, Inc.

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

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

   1:262       2:43        4:14        5:1         6:1         8:347    
  12:2010     13:1        14:441      15:15       16:3        17:8      
  20:9        23:5        24:1605     27:722      31:209      32:60     
  33:3        34:2        37:1        38:764      40:101      41:2400   
  42:3        44:3        46:866      47:4        49:177      50:365    
  52:13       55:3        56:2        57:31       58:846      59:478    
  60:387      61:1268     62:984      63:1919     64:3934     65:2326   
  66:4353     67:1856     68:1081     69:2977     70:700      71:345    
  72:1904     73:1        74:2349     75:297      76:335      77:844    
  78:676      79:452      80:1098     81:829      82:500      83:461    
  84:647      85:1082     86:559      87:760      88:332      89:1581   
  90:183      91:3709     92:514      93:1058     94:1260     95:787    
  96:466      97:251      98:823      99:35      101:63      103:5      
 106:1       107:5       108:84      109:932     110:550     111:695    
 112:325     113:361     114:523     115:683     116:949     117:674    
 118:800     119:1147    120:301     121:672     122:1626    123:1071   
 124:1250    125:1268    128:265     129:164     130:172     131:566    
 132:113     133:19      134:217     135:49      136:214     137:142    
 138:301     139:104     140:486     141:174     142:398     143:397    
 144:485     145:52      146:441     147:207     148:578     149:233    
 150:170     151:187     152:307     153:179     154:3       155:395    
 156:191     157:353     158:132     159:382     160:316     161:243    
 162:277     163:165     164:487     165:350     166:511     167:426    
 168:719     169:153     170:784     171:77      172:1       173:1502   
 174:531     175:359     177:79      178:853     180:821     181:9      
 182:428     183:201     184:252     185:1       186:1140    187:802    
 188:985     189:1004    190:4846    192:5792    193:4829    194:3457   
 195:2964    196:1166    197:16      198:3564    199:3920    200:5522   
 201:1493    202:8351    203:8446    204:4136    205:2329    206:2745   
 207:3029    208:3964    209:3505    210:2726    211:1382    212:1973   
 213:1712    214:744     215:67      216:4879    217:1657    218:561    
 219:374     220:1195    221:483     222:341     223:143    

End of report


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