Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Apr 6 13:47:53 CDT 2012


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,
TRNOG, 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 07 Apr, 2012

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

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

BGP routing table entries examined:                              404580
    Prefixes after maximum aggregation:                          171963
    Deaggregation factor:                                          2.35
    Unique aggregates announced to Internet:                     196184
Total ASes present in the Internet Routing Table:                 40624
    Prefixes per ASN:                                              9.96
Origin-only ASes present in the Internet Routing Table:           32993
Origin ASes announcing only one prefix:                           15464
Transit ASes present in the Internet Routing Table:                5440
Transit-only ASes present in the Internet Routing Table:            139
Average AS path length visible in the Internet Routing Table:       4.4
    Max AS path length visible:                                      32
    Max AS path prepend of ASN (48687)                               24
Prefixes from unregistered ASNs in the Routing Table:               670
    Unregistered ASNs in the Routing Table:                         296
Number of 32-bit ASNs allocated by the RIRs:                       2347
Number of 32-bit ASNs visible in the Routing Table:                2191
Prefixes from 32-bit ASNs in the Routing Table:                    5373
Special use prefixes present in the Routing Table:                    2
Prefixes being announced from unallocated address space:           1411
Number of addresses announced to Internet:                   2533675600
    Equivalent to 151 /8s, 4 /16s and 210 /24s
    Percentage of available address space announced:               68.4
    Percentage of allocated address space announced:               68.4
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               92.1
Total number of prefixes smaller than registry allocations:      171899

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

Prefixes being announced by APNIC Region ASes:                    99031
    Total APNIC prefixes after maximum aggregation:               32155
    APNIC Deaggregation factor:                                    3.08
Prefixes being announced from the APNIC address blocks:           95427
    Unique aggregates announced from the APNIC address blocks:    39280
APNIC Region origin ASes present in the Internet Routing Table:    4678
    APNIC Prefixes per ASN:                                       20.40
APNIC Region origin ASes announcing only one prefix:               1237
APNIC Region transit ASes present in the Internet Routing Table:    730
Average APNIC Region AS path length visible:                        4.6
    Max APNIC Region AS path length visible:                         19
Number of APNIC region 32-bit ASNs visible in the Routing Table:    172
Number of APNIC addresses announced to Internet:              642926944
    Equivalent to 38 /8s, 82 /16s and 73 /24s
    Percentage of available APNIC address space announced:         81.5

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:                    149419
    Total ARIN prefixes after maximum aggregation:                75874
    ARIN Deaggregation factor:                                     1.97
Prefixes being announced from the ARIN address blocks:           120748
    Unique aggregates announced from the ARIN address blocks:     50004
ARIN Region origin ASes present in the Internet Routing Table:    14948
    ARIN Prefixes per ASN:                                         8.08
ARIN Region origin ASes announcing only one prefix:                5685
ARIN Region transit ASes present in the Internet Routing Table:    1571
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          22
Number of ARIN region 32-bit ASNs visible in the Routing Table:      17
Number of ARIN addresses announced to Internet:               805818560
    Equivalent to 48 /8s, 7 /16s and 208 /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:                    100976
    Total RIPE prefixes after maximum aggregation:                53317
    RIPE Deaggregation factor:                                     1.89
Prefixes being announced from the RIPE address blocks:            92174
    Unique aggregates announced from the RIPE address blocks:     57205
RIPE Region origin ASes present in the Internet Routing Table:    16359
    RIPE Prefixes per ASN:                                         5.63
RIPE Region origin ASes announcing only one prefix:                7947
RIPE Region transit ASes present in the Internet Routing Table:    2636
Average RIPE Region AS path length visible:                         4.7
    Max RIPE Region AS path length visible:                          32
Number of RIPE region 32-bit ASNs visible in the Routing Table:    1480
Number of RIPE addresses announced to Internet:               502244616
    Equivalent to 29 /8s, 239 /16s and 165 /24s
    Percentage of available RIPE address space announced:          80.9

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:                   40366
    Total LACNIC prefixes after maximum aggregation:               8212
    LACNIC Deaggregation factor:                                   4.92
Prefixes being announced from the LACNIC address blocks:          39937
    Unique aggregates announced from the LACNIC address blocks:   19771
LACNIC Region origin ASes present in the Internet Routing Table:   1569
    LACNIC Prefixes per ASN:                                      25.45
LACNIC Region origin ASes announcing only one prefix:               431
LACNIC Region transit ASes present in the Internet Routing Table:   295
Average LACNIC Region AS path length visible:                       4.4
    Max LACNIC Region AS path length visible:                        21
Number of LACNIC region 32-bit ASNs visible in the Routing Table:   517
Number of LACNIC addresses announced to Internet:              98728072
    Equivalent to 5 /8s, 226 /16s and 120 /24s
    Percentage of available LACNIC address space announced:        65.4

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:                   8950
    Total AfriNIC prefixes after maximum aggregation:              2118
    AfriNIC Deaggregation factor:                                  4.23
Prefixes being announced from the AfriNIC address blocks:          7001
    Unique aggregates announced from the AfriNIC address blocks:   2160
AfriNIC Region origin ASes present in the Internet Routing Table:   526
    AfriNIC Prefixes per ASN:                                     13.31
AfriNIC Region origin ASes announcing only one prefix:              164
AfriNIC Region transit ASes present in the Internet Routing Table:  118
Average AfriNIC Region AS path length visible:                      4.5
    Max AfriNIC Region AS path length visible:                       25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:    5
Number of AfriNIC addresses announced to Internet:             31531520
    Equivalent to 1 /8s, 225 /16s and 34 /24s
    Percentage of available AfriNIC address space announced:       47.0

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     2476      11110         997   Korea Telecom (KIX)
17974     1782        503          63   PT TELEKOMUNIKASI INDONESIA
 7545     1658        301          85   TPG Internet Pty Ltd
 4755     1575        386         157   TATA Communications formerly 
 9583     1237         94         541   Sify Limited
 9829     1235       1041          30   BSNL National Internet Backbo
 7552     1167       1062          11   Vietel Corporation
 4808     1105       2050         316   CNCGROUP IP network: China169
24560     1021        385         167   Bharti Airtel Ltd., Telemedia
18101      947        131         159   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     3432       3807         196   bellsouth.net, inc. 
 7029     3381        990         156   Windstream Communications Inc
18566     2092        383         179   Covad Communications 
 1785     1893        680         129   PaeTec Communications, Inc.
20115     1637       1561         617   Charter Communications 
 4323     1598       1044         380   Time Warner Telecom
22773     1568       2910         111   Cox Communications, Inc.
30036     1461        265         742   Mediacom Communications Corp 
 7018     1279       9774         828   AT&T WorldNet Services
11492     1185        216         365   Cable One 

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     1773        544          16   Corbina telecom
 2118     1394         97          14   EUnet/RELCOM Autonomous Syste
31148      679         37           9   FreeNet ISP
34984      676        188         173   BILISIM TELEKOM
12479      656        658          57   Uni2 Autonomous System
20940      651        206         500   Akamai Technologies European 
 6830      639       1943         410   UPC Distribution Services
 8551      574        360          81   Bezeq International
 3320      532       8442         398   Deutsche Telekom AG
 2578      501         33           7   Demos, Moscow, Russia

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     1794        326         167   TVCABLE BOGOTA 
28573     1773       1105          61   NET Servicos de Comunicao S.A
 6503     1531        418          64   AVANTEL, S.A. 
 8151     1481       2998         354   UniNet S.A. de C.V. 
 7303     1353        827         189   Telecom Argentina Stet-France
26615      847        697          32   Tim Brasil S.A.
27947      687         74         102   Telconet S.A
11172      637        107          74   Servicios Alestra S.A de C.V 
22047      584        326          15   VTR PUNTO NET S.A. 
 3816      570        242         100   Empresa Nacional de Telecomun

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
 8452     1305        958          13   TEDATA
24863      848        274          35   LINKdotNET AS number
 6713      493        649          18   Itissalat Al-MAGHRIB
 3741      266        921         224   The Internet Solution 
33776      208         12          21   Starcomms Nigeria Limited
12258      197         28          62   Vodacom Internet Company 
24835      178         80           8   RAYA Telecom - Egypt
15706      168         32           6   Sudatel Internet Exchange Aut
16637      165        666          83   MTN Network Solutions
29571      161         15          16   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     3432       3807         196   bellsouth.net, inc. 
 7029     3381        990         156   Windstream Communications Inc
 4766     2476      11110         997   Korea Telecom (KIX)
18566     2092        383         179   Covad Communications 
 1785     1893        680         129   PaeTec Communications, Inc.
10620     1794        326         167   TVCABLE BOGOTA 
17974     1782        503          63   PT TELEKOMUNIKASI INDONESIA
 8402     1773        544          16   Corbina telecom
28573     1773       1105          61   NET Servicos de Comunicao S.A
 7545     1658        301          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
 7029      3381        3225      Windstream Communications Inc
18566      2092        1913      Covad Communications 
 1785      1893        1764      PaeTec Communications, Inc.
 8402      1773        1757      Corbina telecom
17974      1782        1719      PT TELEKOMUNIKASI INDONESIA
28573      1773        1712      NET Servicos de Comunicao S.A
10620      1794        1627      TVCABLE BOGOTA 
 7545      1658        1573      TPG Internet Pty Ltd
 4766      2476        1479      Korea Telecom (KIX)
 6503      1531        1467      AVANTEL, S.A. 

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

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS  Designation  Network              Transit AS  Description
54439   UNALLOCATED  8.25.174.0/24        17378       DBS International 
54470   UNALLOCATED  8.30.171.0/24         3356       Level 3 Communicatio
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, 

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

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix             Origin AS  Description
128.0.0.0/21         12654     RIPE NCC RIS Project
128.0.24.0/24        12654     RIPE NCC RIS Project

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

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

Network            Origin AS  Description
14.192.0.0/22        45464     Room 201, TGU Bldg
14.192.4.0/22        45464     Room 201, TGU Bldg
14.192.8.0/22        45464     Room 201, TGU Bldg
14.192.12.0/22       45464     Room 201, TGU Bldg
14.192.16.0/22       45464     Room 201, TGU Bldg
14.192.20.0/22       45464     Room 201, TGU Bldg
14.192.24.0/22       45464     Room 201, TGU Bldg
14.192.28.0/22       45464     Room 201, TGU Bldg
23.27.0.0/20         54500     EGIHosting
23.27.16.0/20        54500     EGIHosting

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      /10:28      /11:81      /12:235     
/13:459     /14:832     /15:1485    /16:12182   /17:6284    /18:10499   
/19:20616   /20:28820   /21:29800   /22:40437   /23:37608   /24:211529  
/25:1182    /26:1430    /27:784     /28:163     /29:59      /30:17      
/31:0       /32:19      

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

  ASN   No of nets  Total ann.   Description
 7029     3040          3381      Windstream Communications Inc
 6389     2149          3432      bellsouth.net, inc. 
18566     2041          2092      Covad Communications 
 8402     1750          1773      Corbina telecom
10620     1689          1794      TVCABLE BOGOTA 
30036     1401          1461      Mediacom Communications Corp 
 6503     1290          1531      AVANTEL, S.A. 
11492     1148          1185      Cable One 
 8452     1114          1305      TEDATA
 1785     1067          1893      PaeTec Communications, Inc.

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

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

   1:532       2:754       4:14        6:3         8:396      12:1999   
  13:1        14:599      15:12       16:3        17:7        20:8      
  23:161      24:1768     27:1267     31:966      32:58       33:2      
  34:2        36:8        37:319      38:786      40:120      41:3114   
  42:129      44:3        46:1467     47:3        49:350      50:536    
  52:13       54:7        55:9        56:3        57:31       58:958    
  59:494      60:280      61:1203     62:973      63:1997     64:4167   
  65:2260     66:4500     67:2017     68:1152     69:3172     70:908    
  71:467      72:1833     74:2599     75:494      76:313      77:968    
  78:1006     79:498      80:1210     81:899      82:662      83:548    
  84:489      85:1195     86:404      87:908      88:351      89:1635   
  90:297      91:4683     92:520      93:1375     94:1476     95:1137   
  96:378      97:318      98:880      99:37      100:6       101:167    
 103:956     106:74      107:181     108:229     109:1272    110:757    
 111:900     112:448     113:590     114:621     115:796     116:911    
 117:721     118:903     119:1209    120:341     121:695     122:1667   
 123:1104    124:1368    125:1249    128:558     129:190     130:257    
 131:596     132:173     133:21      134:244     135:62      136:207    
 137:176     138:354     139:145     140:494     141:243     142:386    
 143:399     144:512     145:64      146:481     147:272     148:765    
 149:299     150:159     151:176     152:462     153:172     154:7      
 155:428     156:216     157:379     158:175     159:522     160:342    
 161:256     162:347     163:189     164:572     165:388     166:562    
 167:464     168:820     169:127     170:844     171:126     172:4      
 173:1735    174:576     175:429     176:459     177:640     178:1317   
 180:1181    181:73      182:787     183:284     184:451     185:1      
 186:2118    187:1029    188:1184    189:1792    190:5459    192:5990   
 193:5599    194:4615    195:3600    196:1291    197:129     198:3630   
 199:4481    200:5785    201:1902    202:8477    203:8590    204:4339   
 205:2484    206:2746    207:2783    208:4062    209:3581    210:2749   
 211:1476    212:1993    213:1907    214:886     215:109     216:5078   
 217:1521    218:542     219:323     220:1228    221:554     222:322    
 223:331    

End of report



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