[afnog] Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Sep 23 19:29:58 UTC 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 <pfsinoz at gmail.com>.

Routing Table Report   04:00 +10GMT Sat 24 Sep, 2011

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

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

BGP routing table entries examined:                              374059
    Prefixes after maximum aggregation:                          168238
    Deaggregation factor:                                          2.22
    Unique aggregates announced to Internet:                     184911
Total ASes present in the Internet Routing Table:                 38886
    Prefixes per ASN:                                              9.62
Origin-only ASes present in the Internet Routing Table:           32232
Origin ASes announcing only one prefix:                           15494
Transit ASes present in the Internet Routing Table:                5223
Transit-only ASes present in the Internet Routing Table:            138
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      35
    Max AS path prepend of ASN (23456)                               31
Prefixes from unregistered ASNs in the Routing Table:              1402
    Unregistered ASNs in the Routing Table:                         772
Number of 32-bit ASNs allocated by the RIRs:                       1762
Number of 32-bit ASNs visible in the Routing Table:                1431
Prefixes from 32-bit ASNs in the Routing Table:                    3276
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:             97
Number of addresses announced to Internet:                   2479145472
    Equivalent to 147 /8s, 196 /16s and 194 /24s
    Percentage of available address space announced:               66.9
    Percentage of allocated address space announced:               66.9
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               91.4
Total number of prefixes smaller than registry allocations:      156426

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

Prefixes being announced by APNIC Region ASes:                    93852
    Total APNIC prefixes after maximum aggregation:               30727
    APNIC Deaggregation factor:                                    3.05
Prefixes being announced from the APNIC address blocks:           90378
    Unique aggregates announced from the APNIC address blocks:    37990
APNIC Region origin ASes present in the Internet Routing Table:    4575
    APNIC Prefixes per ASN:                                       19.75
APNIC Region origin ASes announcing only one prefix:               1262
APNIC Region transit ASes present in the Internet Routing Table:    709
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         19
Number of APNIC region 32-bit ASNs visible in the Routing Table:     88
Number of APNIC addresses announced to Internet:              627667040
    Equivalent to 37 /8s, 105 /16s and 112 /24s
    Percentage of available APNIC address space announced:         79.6

APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079, 55296-56319,
                       58368-59391, 131072-132095, 132096-133119
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:                    143860
    Total ARIN prefixes after maximum aggregation:                73754
    ARIN Deaggregation factor:                                     1.95
Prefixes being announced from the ARIN address blocks:           115959
    Unique aggregates announced from the ARIN address blocks:     48009
ARIN Region origin ASes present in the Internet Routing Table:    14685
    ARIN Prefixes per ASN:                                         7.90
ARIN Region origin ASes announcing only one prefix:                5659
ARIN Region transit ASes present in the Internet Routing Table:    1562
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          25
Number of ARIN region 32-bit ASNs visible in the Routing Table:      12
Number of ARIN addresses announced to Internet:               804997888
    Equivalent to 47 /8s, 251 /16s and 75 /24s
    Percentage of available ARIN address space announced:          64.0

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:                     89445
    Total RIPE prefixes after maximum aggregation:                50349
    RIPE Deaggregation factor:                                     1.78
Prefixes being announced from the RIPE address blocks:            82150
    Unique aggregates announced from the RIPE address blocks:     54043
RIPE Region origin ASes present in the Internet Routing Table:    15994
    RIPE Prefixes per ASN:                                         5.14
RIPE Region origin ASes announcing only one prefix:                7970
RIPE Region transit ASes present in the Internet Routing Table:    2509
Average RIPE Region AS path length visible:                         4.6
    Max RIPE Region AS path length visible:                          33
Number of RIPE region 32-bit ASNs visible in the Routing Table:    1018
Number of RIPE addresses announced to Internet:               489770368
    Equivalent to 29 /8s, 49 /16s and 77 /24s
    Percentage of available RIPE address space announced:          78.9

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:                   34957
    Total LACNIC prefixes after maximum aggregation:               7779
    LACNIC Deaggregation factor:                                   4.49
Prefixes being announced from the LACNIC address blocks:          34257
    Unique aggregates announced from the LACNIC address blocks:   17926
LACNIC Region origin ASes present in the Internet Routing Table:   1527
    LACNIC Prefixes per ASN:                                      22.43
LACNIC Region origin ASes announcing only one prefix:               447
LACNIC Region transit ASes present in the Internet Routing Table:   273
Average LACNIC Region AS path length visible:                       4.5
    Max LACNIC Region AS path length visible:                        19
Number of LACNIC region 32-bit ASNs visible in the Routing Table:   310
Number of LACNIC addresses announced to Internet:              89159552
    Equivalent to 5 /8s, 80 /16s and 119 /24s
    Percentage of available LACNIC address space announced:        59.0

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:                   8500
    Total AfriNIC prefixes after maximum aggregation:              1993
    AfriNIC Deaggregation factor:                                  4.26
Prefixes being announced from the AfriNIC address blocks:          6578
    Unique aggregates announced from the AfriNIC address blocks:   1995
AfriNIC Region origin ASes present in the Internet Routing Table:   488
    AfriNIC Prefixes per ASN:                                     13.48
AfriNIC Region origin ASes announcing only one prefix:              156
AfriNIC Region transit ASes present in the Internet Routing Table:  102
Average AfriNIC Region AS path length visible:                      4.6
    Max AfriNIC Region AS path length visible:                       25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:    3
Number of AfriNIC addresses announced to Internet:             26803968
    Equivalent to 1 /8s, 152 /16s and 255 /24s
    Percentage of available AfriNIC address space announced:       39.9

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     2503      11048         956   Korea Telecom (KIX)
17974     2004        519          33   PT TELEKOMUNIKASI INDONESIA
 7545     1599        303          86   TPG Internet Pty Ltd
 4755     1555        639         169   TATA Communications formerly 
 7552     1397       1064           7   Vietel Corporation
24560     1182        337         194   Bharti Airtel Ltd., Telemedia
 9829     1158        989          28   BSNL National Internet Backbo
 9583     1085         80         502   Sify Limited
 4808     1074       2098         304   CNCGROUP IP network: China169
18101      950        117         142   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     3561       3817         226   bellsouth.net, inc. 
18566     1913        365         238   Covad Communications 
 1785     1826        680         123   PaeTec Communications, Inc.
 7029     1706       1008         194   Windstream Communications Inc
 4323     1623       1082         391   Time Warner Telecom
20115     1597       1543         633   Charter Communications 
22773     1458       2907          99   Cox Communications, Inc.
30036     1420        264         677   Mediacom Communications Corp 
19262     1396       4728         400   Verizon Global Networks 
 7018     1332       7050         869   AT&T WorldNet Services

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
 8402      967        352          13   Corbina telecom
34984      566        108         181   BILISIM TELEKOM
20940      542        181         420   Akamai Technologies European 
 6830      533       1813         325   UPC Distribution Services
 3320      493       8167         381   Deutsche Telekom AG
 3292      477       2082         407   TDC Tele Danmark
12479      476        594           8   Uni2 Autonomous System
 8866      462        133          26   Bulgarian Telecommunication C
29049      424         31          55   AzerSat LLC.
 3301      405       1904         354   TeliaNet Sweden

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     1679        309         156   TVCABLE BOGOTA 
 8151     1416       2795         354   UniNet S.A. de C.V. 
28573     1362       1013          70   NET Servicos de Comunicao S.A
 7303     1161        681         173   Telecom Argentina Stet-France
14420      734         58          88   CORPORACION NACIONAL DE TELEC
 6503      582        450          69   AVANTEL, S.A. 
22047      580        322          17   VTR PUNTO NET S.A. 
27947      566         55          79   Telconet S.A
 3816      535        232          98   Empresa Nacional de Telecomun
11172      516         85          91   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
24863      812        147          43   LINKdotNET AS number
 8452      710        445          11   TEDATA
15475      451         74           8   Nile Online
36992      291        415          14   Etisalat MISR
 3741      274        938         229   The Internet Solution 
15706      244         32           6   Sudatel Internet Exchange Aut
 6713      242        519          14   Itissalat Al-MAGHRIB
33776      239         13           8   Starcomms Nigeria Limited
12258      198         28          58   Vodacom Internet Company 
29571      190         17          11   Ci Telecom Autonomous system 

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     3561       3817         226   bellsouth.net, inc. 
23456     3276        774        1775   32-bit ASN transition
 4766     2503      11048         956   Korea Telecom (KIX)
17974     2004        519          33   PT TELEKOMUNIKASI INDONESIA
18566     1913        365         238   Covad Communications 
 1785     1826        680         123   PaeTec Communications, Inc.
 7029     1706       1008         194   Windstream Communications Inc
10620     1679        309         156   TVCABLE BOGOTA 
 4323     1623       1082         391   Time Warner Telecom
 7545     1599        303          86   TPG Internet Pty Ltd

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

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

  ASN   No of nets  Net Savings Description
17974      2004        1971      PT TELEKOMUNIKASI INDONESIA
 1785      1826        1703      PaeTec Communications, Inc.
18566      1913        1675      Covad Communications 
 4766      2503        1547      Korea Telecom (KIX)
10620      1679        1523      TVCABLE BOGOTA 
 7545      1599        1513      TPG Internet Pty Ltd
 7029      1706        1512      Windstream Communications Inc
23456      3276        1501      32-bit ASN transition
 7552      1397        1390      Vietel Corporation
 4755      1555        1386      TATA Communications formerly 

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
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
23502   UNALLOCATED  12.44.44.0/24         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
41.222.79.0/24       36938     >>UNKNOWN<<
41.223.92.0/22       36936     >>UNKNOWN<<
46.18.104.0/21       23456     32-bit ASN transition
62.61.220.0/24       24974     Tachyon Europe BV - Wireless 

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      /10:27      /11:81      /12:234     
/13:464     /14:801     /15:1416    /16:11985   /17:5990    /18:10025   
/19:19811   /20:27043   /21:27104   /22:36625   /23:34934   /24:194103  
/25:1117    /26:1336    /27:752     /28:171     /29:4       /30:0       
/31:0       /32:5       

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

  ASN   No of nets  Total ann.   Description
 6389     2198          3561      bellsouth.net, inc. 
18566     1869          1913      Covad Communications 
10620     1574          1679      TVCABLE BOGOTA 
23456     1564          3276      32-bit ASN transition
 7029     1403          1706      Windstream Communications Inc
30036     1377          1420      Mediacom Communications Corp 
11492     1114          1152      Cable One 
 7011     1057          1182      Citizens Utilities 
 1785     1053          1826      PaeTec Communications, Inc.
22773      947          1458      Cox Communications, Inc.

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

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

   1:384       2:297       4:15        5:1         6:3         8:351    
  12:1956     13:1        14:543      15:13       16:3        17:7      
  20:10       23:35       24:1681     27:945      31:543      32:64     
  33:4        34:2        36:4        38:742      40:108      41:2586   
  42:48       44:3        46:992      47:3        49:257      50:421    
  52:13       54:2        55:4        56:2        57:35       58:875    
  59:492      60:340      61:1179     62:1093     63:1940     64:4048   
  65:2303     66:3968     67:1951     68:1116     69:3188     70:814    
  71:377      72:1856     74:2455     75:349      76:341      77:870    
  78:790      79:479      80:1126     81:838      82:505      83:517    
  84:622      85:1086     86:409      87:873      88:351      89:1581   
  90:267      91:4120     92:524      93:1289     94:1325     95:904    
  96:437      97:276      98:931      99:37      101:210     103:316    
 106:70      107:52      108:79      109:1026    110:669     111:784    
 112:324     113:446     114:566     115:688     116:864     117:711    
 118:891     119:1210    120:334     121:686     122:1609    123:1003   
 124:1359    125:1358    128:244     129:179     130:165     131:583    
 132:120     133:21      134:216     135:54      136:212     137:139    
 138:289     139:120     140:494     141:287     142:387     143:411    
 144:486     145:58      146:471     147:215     148:639     149:259    
 150:153     151:191     152:446     153:177     154:6       155:395    
 156:203     157:359     158:146     159:463     160:325     161:207    
 162:339     163:177     164:507     165:373     166:534     167:432    
 168:751     169:146     170:860     171:83      172:1       173:1653   
 174:643     175:400     176:212     177:275     178:998     180:1079   
 181:30      182:626     183:219     184:378     185:1       186:1458   
 187:669     188:944     189:868     190:5164    192:5906    193:5018   
 194:3529    195:3069    196:1250    197:175     198:3591    199:4124   
 200:5520    201:1636    202:8518    203:8483    204:4254    205:2341   
 206:2677    207:2827    208:4030    209:3455    210:2670    211:1464   
 212:2087    213:1776    214:781     215:76      216:4879    217:1609   
 218:559     219:339     220:1227    221:513     222:342     223:263    


End of report



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