Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Sep 16 14:21:31 CDT 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 17 Sep, 2011

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

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

BGP routing table entries examined:                              371690
    Prefixes after maximum aggregation:                          167917
    Deaggregation factor:                                          2.21
    Unique aggregates announced to Internet:                     184823
Total ASes present in the Internet Routing Table:                 38823
    Prefixes per ASN:                                              9.57
Origin-only ASes present in the Internet Routing Table:           32200
Origin ASes announcing only one prefix:                           15478
Transit ASes present in the Internet Routing Table:                5208
Transit-only ASes present in the Internet Routing Table:            134
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      36
    Max AS path prepend of ASN (22394)                               33
Prefixes from unregistered ASNs in the Routing Table:              1319
    Unregistered ASNs in the Routing Table:                         742
Number of 32-bit ASNs allocated by the RIRs:                       1739
Number of 32-bit ASNs visible in the Routing Table:                1415
Prefixes from 32-bit ASNs in the Routing Table:                    3247
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            111
Number of addresses announced to Internet:                   2477780352
    Equivalent to 147 /8s, 175 /16s and 237 /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:               91.3
Total number of prefixes smaller than registry allocations:      154979

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

Prefixes being announced by APNIC Region ASes:                    93491
    Total APNIC prefixes after maximum aggregation:               30741
    APNIC Deaggregation factor:                                    3.04
Prefixes being announced from the APNIC address blocks:           90025
    Unique aggregates announced from the APNIC address blocks:    38232
APNIC Region origin ASes present in the Internet Routing Table:    4567
    APNIC Prefixes per ASN:                                       19.71
APNIC Region origin ASes announcing only one prefix:               1258
APNIC Region transit ASes present in the Internet Routing Table:    710
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         21
Number of APNIC region 32-bit ASNs visible in the Routing Table:     88
Number of APNIC addresses announced to Internet:              627559520
    Equivalent to 37 /8s, 103 /16s and 204 /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:                    143323
    Total ARIN prefixes after maximum aggregation:                73655
    ARIN Deaggregation factor:                                     1.95
Prefixes being announced from the ARIN address blocks:           115248
    Unique aggregates announced from the ARIN address blocks:     47939
ARIN Region origin ASes present in the Internet Routing Table:    14662
    ARIN Prefixes per ASN:                                         7.86
ARIN Region origin ASes announcing only one prefix:                5652
ARIN Region transit ASes present in the Internet Routing Table:    1553
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          36
Number of ARIN region 32-bit ASNs visible in the Routing Table:      12
Number of ARIN addresses announced to Internet:               804847104
    Equivalent to 47 /8s, 248 /16s and 254 /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:                     88191
    Total RIPE prefixes after maximum aggregation:                50131
    RIPE Deaggregation factor:                                     1.76
Prefixes being announced from the RIPE address blocks:            81218
    Unique aggregates announced from the RIPE address blocks:     53898
RIPE Region origin ASes present in the Internet Routing Table:    15982
    RIPE Prefixes per ASN:                                         5.08
RIPE Region origin ASes announcing only one prefix:                7963
RIPE Region transit ASes present in the Internet Routing Table:    2501
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:    1003
Number of RIPE addresses announced to Internet:               488917248
    Equivalent to 29 /8s, 36 /16s and 73 /24s
    Percentage of available RIPE address space announced:          78.8

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:                   34743
    Total LACNIC prefixes after maximum aggregation:               7768
    LACNIC Deaggregation factor:                                   4.47
Prefixes being announced from the LACNIC address blocks:          34025
    Unique aggregates announced from the LACNIC address blocks:   17820
LACNIC Region origin ASes present in the Internet Routing Table:   1527
    LACNIC Prefixes per ASN:                                      22.28
LACNIC Region origin ASes announcing only one prefix:               451
LACNIC Region transit ASes present in the Internet Routing Table:   273
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:   308
Number of LACNIC addresses announced to Internet:              89082496
    Equivalent to 5 /8s, 79 /16s and 74 /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:                   8517
    Total AfriNIC prefixes after maximum aggregation:              2026
    AfriNIC Deaggregation factor:                                  4.20
Prefixes being announced from the AfriNIC address blocks:          6597
    Unique aggregates announced from the AfriNIC address blocks:   2037
AfriNIC Region origin ASes present in the Internet Routing Table:   486
    AfriNIC Prefixes per ASN:                                     13.57
AfriNIC Region origin ASes announcing only one prefix:              154
AfriNIC Region transit ASes present in the Internet Routing Table:  105
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:    4
Number of AfriNIC addresses announced to Internet:             27220736
    Equivalent to 1 /8s, 159 /16s and 91 /24s
    Percentage of available AfriNIC address space announced:       40.6

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     2508      11047         955   Korea Telecom (KIX)
17974     2010        516          31   PT TELEKOMUNIKASI INDONESIA
 7545     1597        303          85   TPG Internet Pty Ltd
 4755     1548        639         170   TATA Communications formerly 
24560     1182        337         194   Bharti Airtel Ltd., Telemedia
 9829     1155        989          28   BSNL National Internet Backbo
 9583     1078         80         505   Sify Limited
 4808     1069       2088         302   CNCGROUP IP network: China169
 7552      978       1062          11   Vietel Corporation
17488      957        189         159   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     3563       3817         226   bellsouth.net, inc. 
18566     1912        364         237   Covad Communications 
 1785     1820        680         122   PaeTec Communications, Inc.
 4323     1626       1085         393   Time Warner Telecom
 7029     1608       1008         195   Windstream Communications Inc
20115     1595       1542         634   Charter Communications 
22773     1455       2906          99   Cox Communications, Inc.
30036     1423        263         688   Mediacom Communications Corp 
19262     1395       4724         399   Verizon Global Networks 
 7018     1331       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
34984      559        108         179   BILISIM TELEKOM
 6830      524       1811         322   UPC Distribution Services
20940      515        166         401   Akamai Technologies European 
 3292      472       2080         404   TDC Tele Danmark
12479      472        594           8   Uni2 Autonomous System
 8866      460        133          26   Bulgarian Telecommunication C
 3320      432       8152         376   Deutsche Telekom AG
29049      424         31          55   AzerSat LLC.
 8402      415        352          13   Corbina telecom
 8551      403        354          44   Bezeq International

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     1675        308         159   TVCABLE BOGOTA 
 8151     1409       2802         355   UniNet S.A. de C.V. 
28573     1351       1012          68   NET Servicos de Comunicao S.A
 7303     1156        678         170   Telecom Argentina Stet-France
14420      730         57          92   CORPORACION NACIONAL DE TELEC
 6503      580        450          68   AVANTEL, S.A. 
22047      579        322          17   VTR PUNTO NET S.A. 
27947      568         55          82   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      813        147          43   LINKdotNET AS number
 8452      698        445          11   TEDATA
15475      513         74           8   Nile Online
36992      308        415          14   Etisalat MISR
 3741      267        938         228   The Internet Solution 
 6713      242        519          14   Itissalat Al-MAGHRIB
33776      239         13           8   Starcomms Nigeria Limited
15706      219         32           6   Sudatel Internet Exchange Aut
12258      198         28          58   Vodacom Internet Company 
29571      198         17          13   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     3563       3817         226   bellsouth.net, inc. 
23456     3247        770        1753   32-bit ASN transition
 4766     2508      11047         955   Korea Telecom (KIX)
17974     2010        516          31   PT TELEKOMUNIKASI INDONESIA
18566     1912        364         237   Covad Communications 
 1785     1820        680         122   PaeTec Communications, Inc.
10620     1675        308         159   TVCABLE BOGOTA 
 4323     1626       1085         393   Time Warner Telecom
 7029     1608       1008         195   Windstream Communications Inc
 7545     1597        303          85   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      2010        1979      PT TELEKOMUNIKASI INDONESIA
 1785      1820        1698      PaeTec Communications, Inc.
18566      1912        1675      Covad Communications 
 4766      2508        1553      Korea Telecom (KIX)
10620      1675        1516      TVCABLE BOGOTA 
 7545      1597        1512      TPG Internet Pty Ltd
23456      3247        1494      32-bit ASN transition
 7029      1608        1413      Windstream Communications Inc
 4755      1548        1378      TATA Communications formerly 
22773      1455        1356      Cox Communications, Inc.

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
50.115.128.0/21      20248     Take 2 Hosting, Inc. 

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      /12:235     
/13:464     /14:800     /15:1411    /16:11970   /17:5965    /18:10012   
/19:19731   /20:26875   /21:26973   /22:36182   /23:34758   /24:192858  
/25:1105    /26:1294    /27:744     /28:165     /29:4       /30:0       
/31:0       /32:5       

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

  ASN   No of nets  Total ann.   Description
 6389     2200          3563      bellsouth.net, inc. 
18566     1868          1912      Covad Communications 
23456     1571          3247      32-bit ASN transition
10620     1570          1675      TVCABLE BOGOTA 
30036     1381          1423      Mediacom Communications Corp 
 7029     1308          1608      Windstream Communications Inc
11492     1114          1152      Cable One 
 7011     1058          1183      Citizens Utilities 
 1785     1052          1820      PaeTec Communications, Inc.
22773      945          1455      Cox Communications, Inc.

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

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

   1:372       2:52        4:15        5:1         6:3         8:351    
  12:1951     13:1        14:540      15:13       16:3        17:5      
  20:10       23:32       24:1678     27:940      31:530      32:64     
  33:4        34:2        36:4        38:742      40:108      41:2576   
  42:48       44:3        46:983      47:3        49:243      50:419    
  52:13       54:2        55:5        56:2        57:35       58:876    
  59:501      60:376      61:1175     62:1088     63:1944     64:4047   
  65:2300     66:3928     67:1939     68:1100     69:3174     70:783    
  71:377      72:1859     74:2437     75:315      76:339      77:870    
  78:665      79:469      80:1122     81:839      82:503      83:499    
  84:687      85:1086     86:410      87:869      88:347      89:1535   
  90:234      91:4088     92:527      93:1150     94:1331     95:791    
  96:437      97:272      98:932      99:37      101:207     103:301    
 106:94      107:44      108:76      109:1017    110:668     111:784    
 112:313     113:440     114:566     115:685     116:922     117:680    
 118:891     119:1199    120:338     121:685     122:1602    123:1015   
 124:1355    125:1354    128:248     129:179     130:167     131:577    
 132:120     133:21      134:215     135:53      136:212     137:137    
 138:294     139:108     140:493     141:288     142:389     143:407    
 144:483     145:61      146:468     147:214     148:636     149:251    
 150:153     151:190     152:452     153:177     154:6       155:390    
 156:202     157:356     158:144     159:461     160:324     161:207    
 162:334     163:176     164:508     165:372     166:536     167:433    
 168:747     169:146     170:860     171:84      172:4       173:1639   
 174:628     175:393     176:176     177:251     178:999     180:1067   
 181:26      182:616     183:237     184:366     185:1       186:1440   
 187:667     188:938     189:872     190:5156    192:5911    193:5005   
 194:3522    195:3057    196:1251    197:148     198:3591    199:4101   
 200:5514    201:1636    202:8528    203:8484    204:4251    205:2333   
 206:2667    207:2829    208:4032    209:3457    210:2693    211:1467   
 212:2088    213:1768    214:784     215:75      216:4849    217:1610   
 218:552     219:333     220:1197    221:514     222:343     223:266    


End of report



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