Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Mar 4 12:37:34 CST 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 05 Mar, 2011

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

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

BGP routing table entries examined:                              349307
    Prefixes after maximum aggregation:                          157488
    Deaggregation factor:                                          2.22
    Unique aggregates announced to Internet:                     172148
Total ASes present in the Internet Routing Table:                 36007
    Prefixes per ASN:                                              9.70
Origin-only ASes present in the Internet Routing Table:           31031
Origin ASes announcing only one prefix:                           14946
Transit ASes present in the Internet Routing Table:                4976
Transit-only ASes present in the Internet Routing Table:            122
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:               375
    Unregistered ASNs in the Routing Table:                         164
Number of 32-bit ASNs allocated by the RIRs:                       1169
Prefixes from 32-bit ASNs in the Routing Table:                       2
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            258
Number of addresses announced to Internet:                   2455757344
    Equivalent to 146 /8s, 95 /16s and 226 /24s
    Percentage of available address space announced:               66.3
    Percentage of allocated address space announced:               66.3
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               89.1
Total number of prefixes smaller than registry allocations:      144961

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

Prefixes being announced by APNIC Region ASes:                    86769
    Total APNIC prefixes after maximum aggregation:               29668
    APNIC Deaggregation factor:                                    2.92
Prefixes being announced from the APNIC address blocks:           83555
    Unique aggregates announced from the APNIC address blocks:    36074
APNIC Region origin ASes present in the Internet Routing Table:    4337
    APNIC Prefixes per ASN:                                       19.27
APNIC Region origin ASes announcing only one prefix:               1198
APNIC Region transit ASes present in the Internet Routing Table:    690
Average APNIC Region AS path length visible:                        4.4
    Max APNIC Region AS path length visible:                         18
Number of APNIC addresses announced to Internet:              594716448
    Equivalent to 35 /8s, 114 /16s and 167 /24s
    Percentage of available APNIC address space announced:         75.4

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:                    140246
    Total ARIN prefixes after maximum aggregation:                71637
    ARIN Deaggregation factor:                                     1.96
Prefixes being announced from the ARIN address blocks:           110832
    Unique aggregates announced from the ARIN address blocks:     44959
ARIN Region origin ASes present in the Internet Routing Table:    14236
    ARIN Prefixes per ASN:                                         7.79
ARIN Region origin ASes announcing only one prefix:                5417
ARIN Region transit ASes present in the Internet Routing Table:    1476
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          23
Number of ARIN addresses announced to Internet:               787480704
    Equivalent to 46 /8s, 240 /16s and 0 /24s
    Percentage of available ARIN address space announced:          62.6

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:                     82597
    Total RIPE prefixes after maximum aggregation:                46884
    RIPE Deaggregation factor:                                     1.76
Prefixes being announced from the RIPE address blocks:            75881
    Unique aggregates announced from the RIPE address blocks:     49204
RIPE Region origin ASes present in the Internet Routing Table:    15386
    RIPE Prefixes per ASN:                                         4.93
RIPE Region origin ASes announcing only one prefix:                7770
RIPE Region transit ASes present in the Internet Routing Table:    2391
Average RIPE Region AS path length visible:                         4.6
    Max RIPE Region AS path length visible:                          30
Number of RIPE addresses announced to Internet:               478711936
    Equivalent to 28 /8s, 136 /16s and 144 /24s
    Percentage of available RIPE address space announced:          77.1

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:                   31972
    Total LACNIC prefixes after maximum aggregation:               7376
    LACNIC Deaggregation factor:                                   4.33
Prefixes being announced from the LACNIC address blocks:          30817
    Unique aggregates announced from the LACNIC address blocks:   16093
LACNIC Region origin ASes present in the Internet Routing Table:   1434
    LACNIC Prefixes per ASN:                                      21.49
LACNIC Region origin ASes announcing only one prefix:               433
LACNIC Region transit ASes present in the Internet Routing Table:   263
Average LACNIC Region AS path length visible:                       4.4
    Max LACNIC Region AS path length visible:                        19
Number of LACNIC addresses announced to Internet:              81347200
    Equivalent to 4 /8s, 217 /16s and 66 /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:                   7507
    Total AfriNIC prefixes after maximum aggregation:              1815
    AfriNIC Deaggregation factor:                                  4.14
Prefixes being announced from the AfriNIC address blocks:          5903
    Unique aggregates announced from the AfriNIC address blocks:   1957
AfriNIC Region origin ASes present in the Internet Routing Table:   433
    AfriNIC Prefixes per ASN:                                     13.63
AfriNIC Region origin ASes announcing only one prefix:              128
AfriNIC Region transit ASes present in the Internet Routing Table:   96
Average AfriNIC Region AS path length visible:                      5.4
    Max AfriNIC Region AS path length visible:                       31
Number of AfriNIC addresses announced to Internet:             21862912
    Equivalent to 1 /8s, 77 /16s and 154 /24s
    Percentage of available AfriNIC address space announced:       32.6

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     2419       9501         891   Korea Telecom (KIX)
 7545     1603        301          83   TPG Internet Pty Ltd
 4755     1421        638         165   TATA Communications formerly 
17974     1405        475          29   PT TELEKOMUNIKASI INDONESIA
24560     1120        323         185   Bharti Airtel Ltd., Telemedia
 4808     1046       2142         294   CNCGROUP IP network: China169
 9583     1045         77         488   Sify Limited
17488      940        161         102   Hathway IP Over Cable Interne
 9829      898        764          46   BSNL National Internet Backbo
18101      878        115         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     3683       3855         260   bellsouth.net, inc. 
 4323     2582       1109         403   Time Warner Telecom
19262     1829       4953         282   Verizon Global Networks 
 1785     1790        697         131   PaeTec Communications, Inc.
 6478     1531        297          94   AT&T Worldnet Services 
20115     1527       1534         650   Charter Communications 
18566     1522        326         178   Covad Communications 
 7018     1364       6706         885   AT&T WorldNet Services
 2386     1296        537         939   AT&T Data Communications Serv
11492     1288        236          70   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      514       1780         319   UPC Distribution Services
 9198      470        267          15   Kazakhtelecom Data Network Ad
34984      466         98         146   BILISIM TELEKOM
 3292      448       1996         389   TDC Tele Danmark
 8866      442        133          23   Bulgarian Telecommunication C
20940      415         99         319   Akamai Technologies European 
 3320      406       7604         354   Deutsche Telekom AG
 8551      405        355          38   Bezeq International
  702      396       1800         310   UUNET - Commercial IP service
12479      394        577           6   Uni2 Autonomous System

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     1382        257         165   TVCABLE BOGOTA 
 8151     1361       2700         363   UniNet S.A. de C.V. 
28573     1221        961          83   NET Servicos de Comunicao S.A
 6503     1174        354          73   AVANTEL, S.A. 
 7303      911        464         147   Telecom Argentina Stet-France
14420      644         56          93   CORPORACION NACIONAL DE TELEC
22047      541        310          15   VTR PUNTO NET S.A. 
 3816      514        225          96   Empresa Nacional de Telecomun
 7738      479        922          30   Telecomunicacoes da Bahia S.A
11172      463         83          82   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      795        445          11   TEDATA
24863      766        147          39   LINKdotNET AS number
15475      439         90          10   Nile Online
36992      301        271          14   Etisalat MISR
 3741      266        987         228   The Internet Solution 
33776      230         13           5   Starcomms Nigeria Limited
24835      222         78          10   RAYA Telecom - Egypt
29571      192         17          11   Ci Telecom Autonomous system 
 6713      187        191          17   Itissalat Al-MAGHRIB
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     3683       3855         260   bellsouth.net, inc. 
 4323     2582       1109         403   Time Warner Telecom
 4766     2419       9501         891   Korea Telecom (KIX)
19262     1829       4953         282   Verizon Global Networks 
 1785     1790        697         131   PaeTec Communications, Inc.
 7545     1603        301          83   TPG Internet Pty Ltd
 6478     1531        297          94   AT&T Worldnet Services 
20115     1527       1534         650   Charter Communications 
18566     1522        326         178   Covad Communications 
 4755     1421        638         165   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      2582        2179      Time Warner Telecom
 1785      1790        1659      PaeTec Communications, Inc.
19262      1829        1547      Verizon Global Networks 
 4766      2419        1528      Korea Telecom (KIX)
 7545      1603        1520      TPG Internet Pty Ltd
 6478      1531        1437      AT&T Worldnet Services 
17974      1405        1376      PT TELEKOMUNIKASI INDONESIA
18566      1522        1344      Covad Communications 
 4755      1421        1256      TATA Communications formerly 
11492      1288        1218      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
16927   UNALLOCATED  12.0.252.0/23         7018       AT&T WorldNet Servic
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

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

Advertised Unallocated Addresses
--------------------------------

Network            Origin AS  Description
1.5.0.0/16           38639     NTT Communications Corporatio
1.6.0.0/15           38639     NTT Communications Corporatio
1.8.0.0/16           38639     NTT Communications Corporatio
1.20.0.0/16          38639     NTT Communications Corporatio
1.32.0.0/16          38639     NTT Communications Corporatio
1.37.0.0/16          38639     NTT Communications Corporatio
1.187.0.0/16         38639     NTT Communications Corporatio
14.0.0.0/24          38639     NTT Communications Corporatio
14.0.1.0/24          38639     NTT Communications Corporatio
14.0.2.0/23          38639     NTT Communications Corporatio

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        /8:24       /9:10      /10:26      /11:73      /12:217     
/13:446     /14:764     /15:1371    /16:11553   /17:5660    /18:9343    
/19:18973   /20:24536   /21:25127   /22:33465   /23:31886   /24:182381  
/25:1154    /26:1395    /27:713     /28:171     /29:9       /30:3       
/31:0       /32:7       

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

  ASN   No of nets  Total ann.   Description
 6389     2272          3683      bellsouth.net, inc. 
18566     1500          1522      Covad Communications 
 6478     1485          1531      AT&T Worldnet Services 
 4323     1391          2582      Time Warner Telecom
10620     1273          1382      TVCABLE BOGOTA 
11492     1245          1288      Cable One 
 7011     1057          1158      Citizens Utilities 
 1785     1055          1790      PaeTec Communications, Inc.
 6503      956          1174      AVANTEL, S.A. 
19262      941          1829      Verizon Global Networks 

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

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

   1:262       2:61        4:14        5:1         8:339       9:1      
  12:2029     13:1        14:423      15:15       16:3        17:8      
  20:9        23:1        24:1508     27:600      31:3        32:60     
  33:4        34:2        36:2        37:1        38:706      39:1      
  40:101      41:2295     42:13       44:3        46:686      47:4      
  49:164      50:174      52:13       55:3        56:2        57:41     
  58:857      59:477      60:384      61:1108     62:1022     63:1926   
  64:3850     65:2347     66:4323     67:1777     68:1067     69:2875   
  70:699      71:406      72:1997     73:1        74:2356     75:291    
  76:342      77:846      78:697      79:444      80:1058     81:791    
  82:522      83:463      84:636      85:1046     86:574      87:753    
  88:357      89:1568     90:169      91:3573     92:493      93:1053   
  94:1224     95:782      96:463      97:253      98:812      99:33     
 101:50      106:1       107:4       108:127     109:910     110:471    
 111:712     112:319     113:388     114:510     115:668     116:955    
 117:677     118:688     119:1045    120:255     121:701     122:1624   
 123:1043    124:1290    125:1258    128:266     129:165     130:172    
 131:562     132:108     133:20      134:219     135:49      136:211    
 137:146     138:295     139:118     140:486     141:203     142:374    
 143:386     144:487     145:51      146:435     147:203     148:638    
 149:273     150:166     151:229     152:299     153:180     154:3      
 155:376     156:178     157:343     158:127     159:378     160:311    
 161:210     162:278     163:155     164:486     165:345     166:501    
 167:409     168:728     169:157     170:758     171:69      172:2      
 173:1245    174:519     175:321     176:1       177:33      178:786    
 180:809     181:4       182:387     183:242     184:249     186:1033   
 187:812     188:906     189:1031    190:4580    192:5769    193:4792   
 194:3502    195:2953    196:1196    197:4       198:3576    199:3838   
 200:5577    201:1583    202:8235    203:8430    204:4108    205:2303   
 206:2652    207:3069    208:3901    209:3483    210:2638    211:1356   
 212:1927    213:1730    214:758     215:63      216:4843    217:1653   
 218:544     219:373     220:1152    221:473     222:319     223:104    


End of report




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