Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Oct 21 14:16:46 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 22 Oct, 2011

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

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

BGP routing table entries examined:                              380496
    Prefixes after maximum aggregation:                          169790
    Deaggregation factor:                                          2.24
    Unique aggregates announced to Internet:                     185657
Total ASes present in the Internet Routing Table:                 39145
    Prefixes per ASN:                                              9.72
Origin-only ASes present in the Internet Routing Table:           32357
Origin ASes announcing only one prefix:                           15520
Transit ASes present in the Internet Routing Table:                5252
Transit-only ASes present in the Internet Routing Table:            137
Average AS path length visible in the Internet Routing Table:       4.4
    Max AS path length visible:                                      33
    Max AS path prepend of ASN (48687)                               24
Prefixes from unregistered ASNs in the Routing Table:              1488
    Unregistered ASNs in the Routing Table:                         824
Number of 32-bit ASNs allocated by the RIRs:                       1876
Number of 32-bit ASNs visible in the Routing Table:                1536
Prefixes from 32-bit ASNs in the Routing Table:                    3535
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:             90
Number of addresses announced to Internet:                   2485983008
    Equivalent to 148 /8s, 45 /16s and 23 /24s
    Percentage of available address space announced:               67.1
    Percentage of allocated address space announced:               67.1
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               91.5
Total number of prefixes smaller than registry allocations:      160795

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

Prefixes being announced by APNIC Region ASes:                    94637
    Total APNIC prefixes after maximum aggregation:               30888
    APNIC Deaggregation factor:                                    3.06
Prefixes being announced from the APNIC address blocks:           91103
    Unique aggregates announced from the APNIC address blocks:    37995
APNIC Region origin ASes present in the Internet Routing Table:    4582
    APNIC Prefixes per ASN:                                       19.88
APNIC Region origin ASes announcing only one prefix:               1263
APNIC Region transit ASes present in the Internet Routing Table:    714
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:     95
Number of APNIC addresses announced to Internet:              628909152
    Equivalent to 37 /8s, 124 /16s and 100 /24s
    Percentage of available APNIC address space announced:         79.8

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:                    145635
    Total ARIN prefixes after maximum aggregation:                74451
    ARIN Deaggregation factor:                                     1.96
Prefixes being announced from the ARIN address blocks:           117542
    Unique aggregates announced from the ARIN address blocks:     48144
ARIN Region origin ASes present in the Internet Routing Table:    14743
    ARIN Prefixes per ASN:                                         7.97
ARIN Region origin ASes announcing only one prefix:                5665
ARIN Region transit ASes present in the Internet Routing Table:    1556
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:               804723200
    Equivalent to 47 /8s, 247 /16s and 26 /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:                     92842
    Total RIPE prefixes after maximum aggregation:                50711
    RIPE Deaggregation factor:                                     1.83
Prefixes being announced from the RIPE address blocks:            85517
    Unique aggregates announced from the RIPE address blocks:     54134
RIPE Region origin ASes present in the Internet Routing Table:    16065
    RIPE Prefixes per ASN:                                         5.32
RIPE Region origin ASes announcing only one prefix:                7986
RIPE Region transit ASes present in the Internet Routing Table:    2526
Average RIPE Region AS path length visible:                         4.7
    Max RIPE Region AS path length visible:                          33
Number of RIPE region 32-bit ASNs visible in the Routing Table:    1077
Number of RIPE addresses announced to Internet:               491110080
    Equivalent to 29 /8s, 69 /16s and 190 /24s
    Percentage of available RIPE address space announced:          79.1

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:                   35142
    Total LACNIC prefixes after maximum aggregation:               7851
    LACNIC Deaggregation factor:                                   4.48
Prefixes being announced from the LACNIC address blocks:          34589
    Unique aggregates announced from the LACNIC address blocks:   18057
LACNIC Region origin ASes present in the Internet Routing Table:   1541
    LACNIC Prefixes per ASN:                                      22.45
LACNIC Region origin ASes announcing only one prefix:               446
LACNIC Region transit ASes present in the Internet Routing Table:   278
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:   348
Number of LACNIC addresses announced to Internet:              91696512
    Equivalent to 5 /8s, 119 /16s and 45 /24s
    Percentage of available LACNIC address space announced:        60.7

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:                   8532
    Total AfriNIC prefixes after maximum aggregation:              2017
    AfriNIC Deaggregation factor:                                  4.23
Prefixes being announced from the AfriNIC address blocks:          6607
    Unique aggregates announced from the AfriNIC address blocks:   1982
AfriNIC Region origin ASes present in the Internet Routing Table:   493
    AfriNIC Prefixes per ASN:                                     13.40
AfriNIC Region origin ASes announcing only one prefix:              160
AfriNIC Region transit ASes present in the Internet Routing Table:  109
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:             27836672
    Equivalent to 1 /8s, 168 /16s and 193 /24s
    Percentage of available AfriNIC address space announced:       41.5

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     2502      11095         963   Korea Telecom (KIX)
17974     1888        519          33   PT TELEKOMUNIKASI INDONESIA
 7545     1610        303          85   TPG Internet Pty Ltd
 4755     1538        636         172   TATA Communications formerly 
 7552     1389       1064           8   Vietel Corporation
 9829     1166        989          28   BSNL National Internet Backbo
 9583     1094         80         498   Sify Limited
 4808     1082       2101         308   CNCGROUP IP network: China169
24560      966        343         220   Bharti Airtel Ltd., Telemedia
18101      952        166         148   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     3545       3814         220   bellsouth.net, inc. 
 7029     2287       1016         197   Windstream Communications Inc
18566     2098        383         177   Covad Communications 
 1785     1839        680         122   PaeTec Communications, Inc.
 4323     1628       1084         393   Time Warner Telecom
20115     1589       1542         623   Charter Communications 
22773     1462       2907         100   Cox Communications, Inc.
19262     1395       4728         400   Verizon Global Networks 
30036     1395        251         672   Mediacom Communications Corp 
 7018     1322       7030         866   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
 3352     2203       2317          51   Ibernet, Internet Access Netw
 8402     1484        352          13   Corbina telecom
 6830      653       1927         415   UPC Distribution Services
34984      584        108         180   BILISIM TELEKOM
20940      548        182         422   Akamai Technologies European 
 3320      504       8169         384   Deutsche Telekom AG
 3292      481       2080         408   TDC Tele Danmark
12479      478        593           7   Uni2 Autonomous System
 8866      459        133          26   Bulgarian Telecommunication C
29049      423         31          55   AzerSat LLC.

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     1694        313         155   TVCABLE BOGOTA 
28573     1442       1032          69   NET Servicos de Comunicao S.A
 8151     1430       2913         352   UniNet S.A. de C.V. 
 7303     1227        747         177   Telecom Argentina Stet-France
27947      588         72          83   Telconet S.A
22047      580        322          17   VTR PUNTO NET S.A. 
 6503      569        450          69   AVANTEL, S.A. 
 7738      552       1050          31   Telecomunicacoes da Bahia S.A
 3816      541        233          96   Empresa Nacional de Telecomun
11172      522         85          95   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      802        146          36   LINKdotNET AS number
 8452      641        446          12   TEDATA
15475      443         74           8   Nile Online
36992      297        415          21   Etisalat MISR
 3741      280        939         229   The Internet Solution 
 6713      244        519          14   Itissalat Al-MAGHRIB
15706      240         32           6   Sudatel Internet Exchange Aut
29571      217         17          13   Ci Telecom Autonomous system 
33776      208         13          14   Starcomms Nigeria Limited
12258      196         28          57   Vodacom Internet Company 

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     3545       3814         220   bellsouth.net, inc. 
 4766     2502      11095         963   Korea Telecom (KIX)
 7029     2287       1016         197   Windstream Communications Inc
 3352     2203       2317          51   Ibernet, Internet Access Netw
18566     2098        383         177   Covad Communications 
17974     1888        519          33   PT TELEKOMUNIKASI INDONESIA
 1785     1839        680         122   PaeTec Communications, Inc.
10620     1694        313         155   TVCABLE BOGOTA 
 4323     1628       1084         393   Time Warner Telecom
 7545     1610        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
 3352      2203        2152      Ibernet, Internet Access Netw
 7029      2287        2090      Windstream Communications Inc
18566      2098        1921      Covad Communications 
17974      1888        1855      PT TELEKOMUNIKASI INDONESIA
 1785      1839        1717      PaeTec Communications, Inc.
 4766      2502        1539      Korea Telecom (KIX)
10620      1694        1539      TVCABLE BOGOTA 
 7545      1610        1525      TPG Internet Pty Ltd
 8402      1484        1471      Corbina telecom
 7552      1389        1381      Vietel Corporation

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
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
17300   UNALLOCATED  12.45.103.0/24        7018       AT&T WorldNet Servic
17300   UNALLOCATED  12.45.110.0/24         701       UUNET Technologies, 
16476   UNALLOCATED  12.46.27.0/24         7018       AT&T WorldNet Servic
32873   UNALLOCATED  12.46.100.0/23       10912       InterNAP Network Ser

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<<
62.61.220.0/24       24974     Tachyon Europe BV - Wireless 
62.61.221.0/24       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      /12:235     
/13:464     /14:808     /15:1425    /16:12014   /17:6038    /18:10044   
/19:19947   /20:27466   /21:27612   /22:37390   /23:35908   /24:197611  
/25:1158    /26:1332    /27:739     /28:157     /29:4       /30:0       
/31:0       /32:5       

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

  ASN   No of nets  Total ann.   Description
 6389     2185          3545      bellsouth.net, inc. 
18566     2047          2098      Covad Communications 
 7029     1959          2287      Windstream Communications Inc
 3352     1751          2203      Ibernet, Internet Access Netw
10620     1589          1694      TVCABLE BOGOTA 
 8402     1460          1484      Corbina telecom
30036     1357          1395      Mediacom Communications Corp 
11492     1118          1156      Cable One 
 1785     1057          1839      PaeTec Communications, Inc.
 7011     1048          1166      Citizens Utilities 

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

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

   1:407       2:482       4:15        5:1         6:3         8:361    
  12:1955     13:1        14:540      15:11       16:3        17:7      
  20:9        23:59       24:1676     27:964      31:604      32:65     
  33:4        34:2        36:4        38:755      40:110      41:2668   
  42:53       44:3        46:999      47:3        49:296      50:441    
  52:13       55:6        56:2        57:37       58:880      59:493    
  60:362      61:1180     62:1085     63:1956     64:4048     65:2310   
  66:4285     67:1980     68:1152     69:3193     70:892      71:379    
  72:1802     74:2573     75:389      76:320      77:888      78:861    
  79:481      80:1590     81:941      82:494      83:575      84:621    
  85:1119     86:405      87:894      88:418      89:1598     90:235    
  91:4210     92:527      93:1536     94:1308     95:1078     96:437    
  97:284      98:918      99:37      101:211     103:390     106:70     
 107:73      108:72      109:1050    110:671     111:789     112:331    
 113:488     114:610     115:706     116:881     117:720     118:900    
 119:1251    120:340     121:692     122:1569    123:1018    124:1355   
 125:1384    128:249     129:177     130:165     131:593     132:145    
 133:21      134:219     135:54      136:213     137:140     138:284    
 139:123     140:488     141:298     142:387     143:432     144:494    
 145:63      146:469     147:215     148:641     149:267     150:166    
 151:192     152:447     153:178     154:7       155:386     156:206    
 157:362     158:153     159:479     160:324     161:214     162:340    
 163:172     164:509     165:369     166:537     167:438     168:742    
 169:146     170:872     171:86      172:4       173:1703    174:684    
 175:426     176:271     177:338     178:1064    180:1092    181:36     
 182:649     183:218     184:385     185:1       186:1299    187:704    
 188:934     189:875     190:5096    192:5916    193:5039    194:3562   
 195:3102    196:1253    197:164     198:3625    199:4167    200:5485   
 201:1650    202:8546    203:8491    204:4293    205:2364    206:2687   
 207:2829    208:4029    209:3573    210:2693    211:1452    212:2079   
 213:1800    214:786     215:96      216:4925    217:1617    218:564    
 219:343     220:1243    221:514     222:345     223:274    

End of report



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