Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri May 21 13:09:30 CDT 2010


This is an automated weekly mailing describing the state of the Internet
Routing Table as seen from APNIC's router in Japan.
Daily listings are sent to bgp-stats at lists.apnic.net

For historical data, please see http://thyme.apnic.net.

If you have any comments please contact Philip Smith <pfs at cisco.com>.

Routing Table Report   04:00 +10GMT Sat 22 May, 2010

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

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

BGP routing table entries examined:                              321165
    Prefixes after maximum aggregation:                          148380
    Deaggregation factor:                                          2.16
    Unique aggregates announced to Internet:                     156870
Total ASes present in the Internet Routing Table:                 34042
    Prefixes per ASN:                                              9.43
Origin-only ASes present in the Internet Routing Table:           29540
Origin ASes announcing only one prefix:                           14366
Transit ASes present in the Internet Routing Table:                4502
Transit-only ASes present in the Internet Routing Table:            102
Average AS path length visible in the Internet Routing Table:       3.6
    Max AS path length visible:                                      24
    Max AS path prepend of ASN (36992)                               22
Prefixes from unregistered ASNs in the Routing Table:               331
    Unregistered ASNs in the Routing Table:                         122
Number of 32-bit ASNs allocated by the RIRs:                        581
Prefixes from 32-bit ASNs in the Routing Table:                     661
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            162
Number of addresses announced to Internet:                   2221080896
    Equivalent to 132 /8s, 99 /16s and 1 /24s
    Percentage of available address space announced:               59.9
    Percentage of allocated address space announced:               65.2
    Percentage of available address space allocated:               91.9
    Percentage of address space in use by end-sites:               82.9
Total number of prefixes smaller than registry allocations:      153934

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

Prefixes being announced by APNIC Region ASes:                    76497
    Total APNIC prefixes after maximum aggregation:               26734
    APNIC Deaggregation factor:                                    2.86
Prefixes being announced from the APNIC address blocks:           73497
    Unique aggregates announced from the APNIC address blocks:    32320
APNIC Region origin ASes present in the Internet Routing Table:    4040
    APNIC Prefixes per ASN:                                       18.19
APNIC Region origin ASes announcing only one prefix:               1110
APNIC Region transit ASes present in the Internet Routing Table:    622
Average APNIC Region AS path length visible:                        3.6
    Max APNIC Region AS path length visible:                         15
Number of APNIC addresses announced to Internet:              519920448
    Equivalent to 30 /8s, 253 /16s and 91 /24s
    Percentage of available APNIC address space announced:         77.5

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,  43/8,  58/8,  59/8,  60/8,
                        61/8, 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:                    134171
    Total ARIN prefixes after maximum aggregation:                69108
    ARIN Deaggregation factor:                                     1.94
Prefixes being announced from the ARIN address blocks:           107058
    Unique aggregates announced from the ARIN address blocks:     41502
ARIN Region origin ASes present in the Internet Routing Table:    13697
    ARIN Prefixes per ASN:                                         7.82
ARIN Region origin ASes announcing only one prefix:                5273
ARIN Region transit ASes present in the Internet Routing Table:    1352
Average ARIN Region AS path length visible:                         3.4
    Max ARIN Region AS path length visible:                          22
Number of ARIN addresses announced to Internet:               731107360
    Equivalent to 43 /8s, 147 /16s and 208 /24s
    Percentage of available ARIN address space announced:          62.3

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,  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,  54/8,
                        55/8,  56/8,  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, 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:                     74051
    Total RIPE prefixes after maximum aggregation:                42968
    RIPE Deaggregation factor:                                     1.72
Prefixes being announced from the RIPE address blocks:            67010
    Unique aggregates announced from the RIPE address blocks:     44081
RIPE Region origin ASes present in the Internet Routing Table:    14472
    RIPE Prefixes per ASN:                                         4.63
RIPE Region origin ASes announcing only one prefix:                7471
RIPE Region transit ASes present in the Internet Routing Table:    2175
Average RIPE Region AS path length visible:                         3.9
    Max RIPE Region AS path length visible:                          21
Number of RIPE addresses announced to Internet:               426216928
    Equivalent to 25 /8s, 103 /16s and 141 /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, 196608-197631
RIPE Address Blocks      2/8,  25/8,  31/8,  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,
                       193/8, 194/8, 195/8, 212/8, 213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes:                   28205
    Total LACNIC prefixes after maximum aggregation:               6791
    LACNIC Deaggregation factor:                                   4.15
Prefixes being announced from the LACNIC address blocks:          26657
    Unique aggregates announced from the LACNIC address blocks:   13910
LACNIC Region origin ASes present in the Internet Routing Table:   1291
    LACNIC Prefixes per ASN:                                      20.65
LACNIC Region origin ASes announcing only one prefix:               405
LACNIC Region transit ASes present in the Internet Routing Table:   225
Average LACNIC Region AS path length visible:                       3.9
    Max LACNIC Region AS path length visible:                        24
Number of LACNIC addresses announced to Internet:              73134848
    Equivalent to 4 /8s, 91 /16s and 243 /24s
    Percentage of available LACNIC address space announced:        72.7

LACNIC AS Blocks       26592-26623, 27648-28671, 52224-53247,
                       262144-263167 plus ERX transfers
LACNIC Address Blocks  186/8, 187/8, 189/8, 190/8, 200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes:                   7345
    Total AfriNIC prefixes after maximum aggregation:              1861
    AfriNIC Deaggregation factor:                                  3.95
Prefixes being announced from the AfriNIC address blocks:          5640
    Unique aggregates announced from the AfriNIC address blocks:   1668
AfriNIC Region origin ASes present in the Internet Routing Table:   365
    AfriNIC Prefixes per ASN:                                     15.45
AfriNIC Region origin ASes announcing only one prefix:              107
AfriNIC Region transit ASes present in the Internet Routing Table:   83
Average AfriNIC Region AS path length visible:                      3.8
    Max AfriNIC Region AS path length visible:                       24
Number of AfriNIC addresses announced to Internet:             17856768
    Equivalent to 1 /8s, 16 /16s and 121 /24s
    Percentage of available AfriNIC address space announced:       53.2

AfriNIC AS Blocks      36864-37887, 327680-328703 & ERX transfers
AfriNIC Address Blocks  41/8, 197/8,

APNIC Region per AS prefix count summary
----------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 4766     1848       8422         483   Korea Telecom (KIX)
17488     1316        140         123   Hathway IP Over Cable Interne
 4755     1306        293         151   TATA Communications formerly 
 7545     1212        232         105   TPG Internet Pty Ltd
17974     1059        281          18   PT TELEKOMUNIKASI INDONESIA
 9583      990         73         485   Sify Limited
24560      900        305         169   Bharti Airtel Ltd., Telemedia
 4134      872      21191         403   CHINANET-BACKBONE
 4808      845       1587         214   CNCGROUP IP network: China169
 9829      791        681          34   BSNL National Internet Backbo

Complete listing at http://thyme.apnic.net/current/data-ASnet-APNIC

ARIN Region per AS prefix count summary
---------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 6389     3932       3733         288   bellsouth.net, inc. 
 4323     3843       1116         404   Time Warner Telecom
 1785     1783        699         130   PaeTec Communications, Inc.
 7018     1540       5754         980   AT&T WorldNet Services
20115     1538       1506         654   Charter Communications 
 2386     1281        568         911   AT&T Data Communications Serv
 6478     1248        257          99   AT&T Worldnet Services 
 3356     1191      10887         407   Level 3 Communications, LLC 
22773     1155       2604          64   Cox Communications, Inc.
11492     1146        210         285   Cable One 

Complete listing at http://thyme.apnic.net/current/data-ASnet-ARIN

RIPE Region per AS prefix count summary
---------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
35805      627         56           6   United Telecom of Georgia
 3292      454       2027         393   TDC Tele Danmark
30890      442        116         207   Evolva Telecom
  702      414       1869         328   UUNET - Commercial IP service
 8551      402        355          38   Bezeq International
 8866      396        117          18   Bulgarian Telecommunication C
 3320      367       7072         318   Deutsche Telekom AG
 3301      365       1413         321   TeliaNet Sweden
12479      337        576           5   Uni2 Autonomous System
 3215      329       3218         101   France Telecom Transpac

Complete listing at http://thyme.apnic.net/current/data-ASnet-RIPE

LACNIC Region per AS prefix count summary
-----------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 8151     1553       2965         245   UniNet S.A. de C.V. 
10620     1042        234         152   TVCABLE BOGOTA 
28573      877        720          76   NET Servicos de Comunicao S.A
 7303      729        377         107   Telecom Argentina Stet-France
 6503      580        173         209   AVANTEL, S.A. 
22047      545        310          15   VTR PUNTO NET S.A. 
 7738      477        922          30   Telecomunicacoes da Bahia S.A
 3816      470        202          73   Empresa Nacional de Telecomun
14117      455         30          13   Telefonica del Sur S.A. 
11172      444         99          72   Servicios Alestra S.A de C.V 

Complete listing at http://thyme.apnic.net/current/data-ASnet-LACNIC

AfriNIC Region per AS prefix count summary
------------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 8452     1262        445          10   TEDATA
24863      712        147          39   LINKdotNET AS number
36992      643        278         184   Etisalat MISR
 3741      270        852         231   The Internet Solution 
 2018      216        231         112   Tertiary Education Network 
33776      213         11          14   Starcomms Nigeria Limited
 6713      176        167          12   Itissalat Al-MAGHRIB
24835      175         78          10   RAYA Telecom - Egypt
29571      172         19           9   Ci Telecom Autonomous system 
29975      132        490          17   Vodacom

Complete listing at http://thyme.apnic.net/current/data-ASnet-AFRINIC

Global Per AS prefix count summary
----------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 6389     3932       3733         288   bellsouth.net, inc. 
 4323     3843       1116         404   Time Warner Telecom
 4766     1848       8422         483   Korea Telecom (KIX)
 1785     1783        699         130   PaeTec Communications, Inc.
 8151     1553       2965         245   UniNet S.A. de C.V. 
 7018     1540       5754         980   AT&T WorldNet Services
20115     1538       1506         654   Charter Communications 
17488     1316        140         123   Hathway IP Over Cable Interne
 4755     1306        293         151   TATA Communications formerly 
 2386     1281        568         911   AT&T Data Communications Serv

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

Global Per AS Maximum Aggr summary
----------------------------------

  ASN   No of nets  Net Savings Description
 4323      3843        3439      Time Warner Telecom
 1785      1783        1653      PaeTec Communications, Inc.
 4766      1848        1365      Korea Telecom (KIX)
 8151      1553        1308      UniNet S.A. de C.V. 
 8452      1262        1252      TEDATA
17488      1316        1193      Hathway IP Over Cable Interne
 4755      1306        1155      TATA Communications formerly 
 6478      1248        1149      AT&T Worldnet Services 
 7545      1212        1107      TPG Internet Pty Ltd
22773      1155        1091      Cox Communications, Inc.

Complete listing at http://thyme.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        7018       AT&T WorldNet Servic
13746   UNALLOCATED  12.24.56.0/24         7018       AT&T WorldNet Servic
32567   UNALLOCATED  12.25.107.0/24        7018       AT&T WorldNet Servic
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.apnic.net/current/data-badAS

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

Network            Origin AS  Description
31.0.0.0/16          12654     RIPE NCC RIS Project
31.1.0.0/21          12654     RIPE NCC RIS Project
31.1.24.0/24         12654     RIPE NCC RIS Project
41.202.96.0/19       29571     Ci Telecom Autonomous system 
41.222.79.0/24       36938     >>UNKNOWN<<
41.223.92.0/22       36936     >>UNKNOWN<<
41.223.188.0/24      22351     Intelsat 
41.223.196.0/24      36990     Alkan Telecom Ltd
41.223.197.0/24      36990     Alkan Telecom Ltd
41.223.198.0/24      36990     Alkan Telecom Ltd

Complete listing at http://thyme.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       /9:10      /10:26      /11:67      /12:194     
/13:401     /14:689     /15:1269    /16:11071   /17:5272    /18:8978    
/19:18255   /20:22557   /21:22602   /22:29441   /23:29089   /24:168288  
/25:949     /26:1204    /27:618     /28:142     /29:9       /30:7       
/31:0       /32:8       

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

  ASN   No of nets  Total ann.   Description
 6389     2516          3932      bellsouth.net, inc. 
 4323     2329          3843      Time Warner Telecom
 4766     1480          1848      Korea Telecom (KIX)
 1785     1247          1783      PaeTec Communications, Inc.
 8452     1140          1262      TEDATA
17488     1063          1316      Hathway IP Over Cable Interne
11492     1062          1146      Cable One 
18566     1040          1059      Covad Communications 
10620      958          1042      TVCABLE BOGOTA 
 7018      925          1540      AT&T WorldNet Services

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

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

   1:1         4:13        8:263      12:2002     13:10       14:1      
  15:23       16:3        17:8        20:21       24:1431     27:99     
  31:1        32:47       33:12       38:671      40:98       41:2486   
  44:3        47:26       52:6        55:7        56:2        57:24     
  58:724      59:497      60:434      61:1071     62:1062     63:1979   
  64:3854     65:2353     66:4203     67:1844     68:1112     69:2836   
  70:714      71:243      72:1820     73:2        74:2292     75:252    
  76:309      77:859      78:633      79:414      80:1015     81:789    
  82:482      83:453      84:697      85:1060     86:466      87:704    
  88:330      89:1551     90:88       91:2755     92:505      93:1114   
  94:1426     95:596      96:280      97:314      98:548      99:28     
 108:32      109:481     110:353     111:502     112:261     113:286    
 114:402     115:556     116:1038    117:641     118:442     119:920    
 120:139     121:725     122:1432    123:897     124:1106    125:1294   
 128:210     129:209     130:193     131:560     132:246     133:17     
 134:193     135:44      136:226     137:173     138:255     139:92     
 140:482     141:135     142:353     143:383     144:476     145:52     
 146:428     147:165     148:614     149:288     150:153     151:169    
 152:261     153:167     154:2       155:324     156:155     157:325    
 158:107     159:375     160:314     161:185     162:262     163:179    
 164:407     165:346     166:475     167:393     168:783     169:160    
 170:705     171:51      172:2       173:739     174:644     175:93     
 176:1       178:93      180:477     182:60      183:254     184:45     
 186:383     187:346     188:1340    189:782     190:3640    192:5739   
 193:4693    194:3358    195:2769    196:1211    197:1       198:3567   
 199:3433    200:5308    201:1500    202:7983    203:8287    204:4062   
 205:2323    206:2528    207:3036    208:3893    209:3415    210:2503   
 211:1242    212:1735    213:1677    214:660     215:70      216:4613   
 217:1538    218:487     219:371     220:1106    221:400     222:315    
 223:1      

End of report




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