Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Oct 28 14:17:17 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 29 Oct, 2011

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

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

BGP routing table entries examined:                              379556
    Prefixes after maximum aggregation:                          166311
    Deaggregation factor:                                          2.28
    Unique aggregates announced to Internet:                     186116
Total ASes present in the Internet Routing Table:                 39180
    Prefixes per ASN:                                              9.69
Origin-only ASes present in the Internet Routing Table:           32352
Origin ASes announcing only one prefix:                           15498
Transit ASes present in the Internet Routing Table:                5266
Transit-only ASes present in the Internet Routing Table:            133
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:              1580
    Unregistered ASNs in the Routing Table:                         843
Number of 32-bit ASNs allocated by the RIRs:                       1911
Number of 32-bit ASNs visible in the Routing Table:                1562
Prefixes from 32-bit ASNs in the Routing Table:                    3627
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:             95
Number of addresses announced to Internet:                   2489057440
    Equivalent to 148 /8s, 92 /16s and 0 /24s
    Percentage of available address space announced:               67.2
    Percentage of allocated address space announced:               67.2
    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:      159572

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

Prefixes being announced by APNIC Region ASes:                    94855
    Total APNIC prefixes after maximum aggregation:               30982
    APNIC Deaggregation factor:                                    3.06
Prefixes being announced from the APNIC address blocks:           91300
    Unique aggregates announced from the APNIC address blocks:    38074
APNIC Region origin ASes present in the Internet Routing Table:    4590
    APNIC Prefixes per ASN:                                       19.89
APNIC Region origin ASes announcing only one prefix:               1266
APNIC Region transit ASes present in the Internet Routing Table:    721
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:     98
Number of APNIC addresses announced to Internet:              629428896
    Equivalent to 37 /8s, 132 /16s and 82 /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:                    145811
    Total ARIN prefixes after maximum aggregation:                74492
    ARIN Deaggregation factor:                                     1.96
Prefixes being announced from the ARIN address blocks:           117702
    Unique aggregates announced from the ARIN address blocks:     48191
ARIN Region origin ASes present in the Internet Routing Table:    14743
    ARIN Prefixes per ASN:                                         7.98
ARIN Region origin ASes announcing only one prefix:                5663
ARIN Region transit ASes present in the Internet Routing Table:    1558
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:               804671488
    Equivalent to 47 /8s, 246 /16s and 80 /24s
    Percentage of available ARIN address space announced:          63.9

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:                     91098
    Total RIPE prefixes after maximum aggregation:                50841
    RIPE Deaggregation factor:                                     1.79
Prefixes being announced from the RIPE address blocks:            83738
    Unique aggregates announced from the RIPE address blocks:     54302
RIPE Region origin ASes present in the Internet Routing Table:    16072
    RIPE Prefixes per ASN:                                         5.21
RIPE Region origin ASes announcing only one prefix:                7969
RIPE Region transit ASes present in the Internet Routing Table:    2528
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:    1092
Number of RIPE addresses announced to Internet:               491265472
    Equivalent to 29 /8s, 72 /16s and 29 /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:                   35470
    Total LACNIC prefixes after maximum aggregation:               7898
    LACNIC Deaggregation factor:                                   4.49
Prefixes being announced from the LACNIC address blocks:          34922
    Unique aggregates announced from the LACNIC address blocks:   18132
LACNIC Region origin ASes present in the Internet Routing Table:   1540
    LACNIC Prefixes per ASN:                                      22.68
LACNIC Region origin ASes announcing only one prefix:               442
LACNIC Region transit ASes present in the Internet Routing Table:   283
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:   356
Number of LACNIC addresses announced to Internet:              92626368
    Equivalent to 5 /8s, 133 /16s and 93 /24s
    Percentage of available LACNIC address space announced:        61.3

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:                   8526
    Total AfriNIC prefixes after maximum aggregation:              2021
    AfriNIC Deaggregation factor:                                  4.22
Prefixes being announced from the AfriNIC address blocks:          6631
    Unique aggregates announced from the AfriNIC address blocks:   1988
AfriNIC Region origin ASes present in the Internet Routing Table:   495
    AfriNIC Prefixes per ASN:                                     13.40
AfriNIC Region origin ASes announcing only one prefix:              158
AfriNIC Region transit ASes present in the Internet Routing Table:  107
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:             27830528
    Equivalent to 1 /8s, 168 /16s and 169 /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     2507      11096         967   Korea Telecom (KIX)
17974     1884        519          33   PT TELEKOMUNIKASI INDONESIA
 7545     1611        303          84   TPG Internet Pty Ltd
 4755     1539        637         174   TATA Communications formerly 
 7552     1393       1064           8   Vietel Corporation
 9829     1166        989          28   BSNL National Internet Backbo
 9583     1091         80         499   Sify Limited
 4808     1090       2103         312   CNCGROUP IP network: China169
24560      964        342         218   Bharti Airtel Ltd., Telemedia
18101      953        166         150   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     3544       3814         220   bellsouth.net, inc. 
 7029     2329       1016         197   Windstream Communications Inc
18566     2097        383         177   Covad Communications 
 1785     1841        680         122   PaeTec Communications, Inc.
 4323     1623       1078         388   Time Warner Telecom
20115     1595       1546         620   Charter Communications 
22773     1458       2907         100   Cox Communications, Inc.
19262     1395       4728         400   Verizon Global Networks 
30036     1393        253         671   Mediacom Communications Corp 
 7018     1317       7029         861   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     1500        352          13   Corbina telecom
 6830      653       1927         415   UPC Distribution Services
34984      590        108         180   BILISIM TELEKOM
20940      547        182         422   Akamai Technologies European 
 3320      506       8169         386   Deutsche Telekom AG
12479      479        596           9   Uni2 Autonomous System
 3292      478       2074         405   TDC Tele Danmark
 8866      461        133          26   Bulgarian Telecommunication C
 8551      403        354          44   Bezeq International
31148      401         21         111   FreeNet ISP

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     1699        314         156   TVCABLE BOGOTA 
28573     1473       1040          72   NET Servicos de Comunicao S.A
 8151     1417       2927         348   UniNet S.A. de C.V. 
 7303     1231        748         177   Telecom Argentina Stet-France
27947      588         72          83   Telconet S.A
22047      580        322          17   VTR PUNTO NET S.A. 
 6503      572        450          69   AVANTEL, S.A. 
 7738      552       1050          31   Telecomunicacoes da Bahia S.A
 3816      538        233          95   Empresa Nacional de Telecomun
11172      525         86          96   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      651        446          12   TEDATA
15475      444         74           8   Nile Online
36992      299        415          20   Etisalat MISR
 3741      280        939         229   The Internet Solution 
 6713      244        519          14   Itissalat Al-MAGHRIB
15706      240         32           6   Sudatel Internet Exchange Aut
33776      221         13           8   Starcomms Nigeria Limited
29571      219         18          14   Ci Telecom Autonomous system 
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     3544       3814         220   bellsouth.net, inc. 
 4766     2507      11096         967   Korea Telecom (KIX)
 7029     2329       1016         197   Windstream Communications Inc
18566     2097        383         177   Covad Communications 
17974     1884        519          33   PT TELEKOMUNIKASI INDONESIA
 1785     1841        680         122   PaeTec Communications, Inc.
10620     1699        314         156   TVCABLE BOGOTA 
 4323     1623       1078         388   Time Warner Telecom
 7545     1611        303          84   TPG Internet Pty Ltd
20115     1595       1546         620   Charter Communications 

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

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

  ASN   No of nets  Net Savings Description
 7029      2329        2132      Windstream Communications Inc
18566      2097        1920      Covad Communications 
17974      1884        1851      PT TELEKOMUNIKASI INDONESIA
 1785      1841        1719      PaeTec Communications, Inc.
10620      1699        1543      TVCABLE BOGOTA 
 4766      2507        1540      Korea Telecom (KIX)
 7545      1611        1527      TPG Internet Pty Ltd
 8402      1500        1487      Corbina telecom
28573      1473        1401      NET Servicos de Comunicao S.A
 7552      1393        1385      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
41.79.132.0/23       30969     Zimbabwe OnLine (Private) Ltd
41.79.132.0/22       30969     Zimbabwe OnLine (Private) Ltd
41.79.134.0/23       30969     Zimbabwe OnLine (Private) Ltd
41.222.79.0/24       36938     >>UNKNOWN<<

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      /12:236     
/13:465     /14:809     /15:1427    /16:12024   /17:6073    /18:10088   
/19:19938   /20:27559   /21:27543   /22:37225   /23:35231   /24:197353  
/25:1167    /26:1351    /27:757     /28:162     /29:4       /30:0       
/31:0       /32:5       

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

  ASN   No of nets  Total ann.   Description
 6389     2184          3544      bellsouth.net, inc. 
18566     2046          2097      Covad Communications 
 7029     1999          2329      Windstream Communications Inc
10620     1594          1699      TVCABLE BOGOTA 
 8402     1476          1500      Corbina telecom
30036     1354          1393      Mediacom Communications Corp 
11492     1118          1156      Cable One 
 1785     1056          1841      PaeTec Communications, Inc.
 7011     1050          1168      Citizens Utilities 
22773      946          1458      Cox Communications, Inc.

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

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

   1:411       2:490       4:15        5:1         6:3         8:361    
  12:1954     13:1        14:544      15:11       16:3        17:7      
  20:9        23:60       24:1683     27:972      31:626      32:61     
  33:2        34:2        36:4        38:757      40:110      41:2664   
  42:53       44:3        46:1007     47:3        49:291      50:438    
  52:13       55:6        56:2        57:40       58:884      59:494    
  60:363      61:1174     62:1087     63:1950     64:4058     65:2305   
  66:4275     67:1982     68:1154     69:3202     70:883      71:382    
  72:1805     74:2604     75:393      76:318      77:879      78:868    
  79:452      80:1134     81:838      82:502      83:527      84:619    
  85:1122     86:403      87:890      88:353      89:1607     90:237    
  91:4242     92:530      93:1532     94:1302     95:1077     96:434    
  97:284      98:928      99:37      101:220     103:413     106:70     
 107:78      108:72      109:1055    110:665     111:795     112:334    
 113:487     114:617     115:710     116:880     117:721     118:901    
 119:1262    120:339     121:693     122:1566    123:1016    124:1354   
 125:1361    128:243     129:185     130:164     131:626     132:146    
 133:21      134:220     135:54      136:213     137:140     138:286    
 139:123     140:489     141:309     142:389     143:419     144:495    
 145:63      146:461     147:216     148:642     149:267     150:167    
 151:194     152:447     153:178     154:7       155:389     156:208    
 157:358     158:154     159:484     160:331     161:214     162:341    
 163:173     164:511     165:370     166:539     167:435     168:742    
 169:146     170:873     171:86      172:4       173:1718    174:673    
 175:423     176:282     177:356     178:1079    180:1121    181:36     
 182:653     183:220     184:379     185:1       186:1301    187:707    
 188:949     189:867     190:5144    192:5933    193:5037    194:3560   
 195:3115    196:1230    197:164     198:3627    199:4166    200:5519   
 201:1687    202:8572    203:8480    204:4306    205:2363    206:2674   
 207:2824    208:4027    209:3575    210:2713    211:1459    212:2086   
 213:1777    214:796     215:96      216:4924    217:1602    218:563    
 219:342     220:1250    221:515     222:343     223:271    

End of report



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