Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Mar 30 13:59:57 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 31 Mar, 2012

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

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

BGP routing table entries examined:                              403929
    Prefixes after maximum aggregation:                          171635
    Deaggregation factor:                                          2.35
    Unique aggregates announced to Internet:                     195814
Total ASes present in the Internet Routing Table:                 40542
    Prefixes per ASN:                                              9.96
Origin-only ASes present in the Internet Routing Table:           32969
Origin ASes announcing only one prefix:                           15468
Transit ASes present in the Internet Routing Table:                5416
Transit-only ASes present in the Internet Routing Table:            140
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:               555
    Unregistered ASNs in the Routing Table:                         265
Number of 32-bit ASNs allocated by the RIRs:                       2342
Number of 32-bit ASNs visible in the Routing Table:                2157
Prefixes from 32-bit ASNs in the Routing Table:                    5295
Special use prefixes present in the Routing Table:                    2
Prefixes being announced from unallocated address space:           1252
Number of addresses announced to Internet:                   2531398224
    Equivalent to 150 /8s, 226 /16s and 18 /24s
    Percentage of available address space announced:               68.3
    Percentage of allocated address space announced:               68.3
    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:      171545

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

Prefixes being announced by APNIC Region ASes:                    98994
    Total APNIC prefixes after maximum aggregation:               32099
    APNIC Deaggregation factor:                                    3.08
Prefixes being announced from the APNIC address blocks:           95394
    Unique aggregates announced from the APNIC address blocks:    39244
APNIC Region origin ASes present in the Internet Routing Table:    4680
    APNIC Prefixes per ASN:                                       20.38
APNIC Region origin ASes announcing only one prefix:               1238
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:    171
Number of APNIC addresses announced to Internet:              642314080
    Equivalent to 38 /8s, 72 /16s and 239 /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:                    149258
    Total ARIN prefixes after maximum aggregation:                75828
    ARIN Deaggregation factor:                                     1.97
Prefixes being announced from the ARIN address blocks:           120636
    Unique aggregates announced from the ARIN address blocks:     49969
ARIN Region origin ASes present in the Internet Routing Table:    14935
    ARIN Prefixes per ASN:                                         8.08
ARIN Region origin ASes announcing only one prefix:                5686
ARIN Region transit ASes present in the Internet Routing Table:    1569
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:      16
Number of ARIN addresses announced to Internet:               805141184
    Equivalent to 47 /8s, 253 /16s and 122 /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:                    100814
    Total RIPE prefixes after maximum aggregation:                53186
    RIPE Deaggregation factor:                                     1.90
Prefixes being announced from the RIPE address blocks:            92127
    Unique aggregates announced from the RIPE address blocks:     57226
RIPE Region origin ASes present in the Internet Routing Table:    16345
    RIPE Prefixes per ASN:                                         5.64
RIPE Region origin ASes announcing only one prefix:                7946
RIPE Region transit ASes present in the Internet Routing Table:    2622
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:    1462
Number of RIPE addresses announced to Internet:               502238984
    Equivalent to 29 /8s, 239 /16s and 143 /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:                   40250
    Total LACNIC prefixes after maximum aggregation:               8151
    LACNIC Deaggregation factor:                                   4.94
Prefixes being announced from the LACNIC address blocks:          39809
    Unique aggregates announced from the LACNIC address blocks:   19696
LACNIC Region origin ASes present in the Internet Routing Table:   1574
    LACNIC Prefixes per ASN:                                      25.29
LACNIC Region origin ASes announcing only one prefix:               434
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:   503
Number of LACNIC addresses announced to Internet:              98765960
    Equivalent to 5 /8s, 227 /16s and 12 /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:                   8916
    Total AfriNIC prefixes after maximum aggregation:              2121
    AfriNIC Deaggregation factor:                                  4.20
Prefixes being announced from the AfriNIC address blocks:          6971
    Unique aggregates announced from the AfriNIC address blocks:   2163
AfriNIC Region origin ASes present in the Internet Routing Table:   526
    AfriNIC Prefixes per ASN:                                     13.25
AfriNIC Region origin ASes announcing only one prefix:              164
AfriNIC Region transit ASes present in the Internet Routing Table:  115
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:             31533568
    Equivalent to 1 /8s, 225 /16s and 42 /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     2479      11109         992   Korea Telecom (KIX)
17974     1787        503          63   PT TELEKOMUNIKASI INDONESIA
 7545     1659        301          89   TPG Internet Pty Ltd
 4755     1573        386         158   TATA Communications formerly 
 9583     1238         95         540   Sify Limited
 9829     1209       1025          29   BSNL National Internet Backbo
 7552     1173       1062          11   Vietel Corporation
 4808     1102       2050         316   CNCGROUP IP network: China169
24560     1021        385         167   Bharti Airtel Ltd., Telemedia
18101      949        131         160   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     3379       3807         196   bellsouth.net, inc. 
 7029     3379        990         155   Windstream Communications Inc
18566     2092        383         179   Covad Communications 
 1785     1889        680         129   PaeTec Communications, Inc.
20115     1633       1559         624   Charter Communications 
 4323     1602       1060         382   Time Warner Telecom
22773     1552       2910         111   Cox Communications, Inc.
30036     1415        256         745   Mediacom Communications Corp 
 7018     1282       9791         831   AT&T WorldNet Services
11492     1184        216         364   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     1792        544          16   Corbina telecom
 2118     1427         97          13   EUnet/RELCOM Autonomous Syste
31148      677         37           9   FreeNet ISP
34984      673        188         174   BILISIM TELEKOM
12479      656        658          57   Uni2 Autonomous System
20940      646        206         498   Akamai Technologies European 
 6830      641       1943         412   UPC Distribution Services
 8551      571        360          81   Bezeq International
 3320      532       8442         398   Deutsche Telekom AG
 2578      500         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     1817        330         131   TVCABLE BOGOTA 
28573     1745       1105          60   NET Servicos de Comunicao S.A
 8151     1491       3018         350   UniNet S.A. de C.V. 
 7303     1352        827         188   Telecom Argentina Stet-France
 6503     1348        418          65   AVANTEL, S.A. 
26615      903        700          28   Tim Brasil S.A.
27947      688         74         100   Telconet S.A
11172      636         91          73   Servicios Alestra S.A de C.V 
22047      584        326          15   VTR PUNTO NET S.A. 
 3816      566        242         105   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     1294        958          13   TEDATA
24863      848        274          35   LINKdotNET AS number
 6713      491        649          18   Itissalat Al-MAGHRIB
 3741      272        924         229   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      164        664          82   MTN Network Solutions
29571      159         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     3379       3807         196   bellsouth.net, inc. 
 7029     3379        990         155   Windstream Communications Inc
 4766     2479      11109         992   Korea Telecom (KIX)
18566     2092        383         179   Covad Communications 
 1785     1889        680         129   PaeTec Communications, Inc.
10620     1817        330         131   TVCABLE BOGOTA 
 8402     1792        544          16   Corbina telecom
17974     1787        503          63   PT TELEKOMUNIKASI INDONESIA
28573     1745       1105          60   NET Servicos de Comunicao S.A
 7545     1659        301          89   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      3379        3224      Windstream Communications Inc
18566      2092        1913      Covad Communications 
 8402      1792        1776      Corbina telecom
 1785      1889        1760      PaeTec Communications, Inc.
17974      1787        1724      PT TELEKOMUNIKASI INDONESIA
10620      1817        1686      TVCABLE BOGOTA 
28573      1745        1685      NET Servicos de Comunicao S.A
 7545      1659        1570      TPG Internet Pty Ltd
 4766      2479        1487      Korea Telecom (KIX)
22773      1552        1441      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
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     
/13:457     /14:833     /15:1482    /16:12185   /17:6278    /18:10478   
/19:20577   /20:28760   /21:29730   /22:40327   /23:37561   /24:211199  
/25:1192    /26:1432    /27:797     /28:170     /29:60      /30:17      
/31:0       /32:19      

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

  ASN   No of nets  Total ann.   Description
 7029     3039          3379      Windstream Communications Inc
 6389     2095          3379      bellsouth.net, inc. 
18566     2041          2092      Covad Communications 
 8402     1769          1792      Corbina telecom
10620     1707          1817      TVCABLE BOGOTA 
30036     1359          1415      Mediacom Communications Corp 
11492     1147          1184      Cable One 
 6503     1118          1348      AVANTEL, S.A. 
 8452     1102          1294      TEDATA
 1785     1067          1889      PaeTec Communications, Inc.

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

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

   1:531       2:755       4:14        6:3         8:394      12:1987   
  13:1        14:605      15:12       16:3        17:7        20:8      
  23:160      24:1754     27:1257     31:936      32:58       33:2      
  34:2        36:8        37:313      38:790      40:120      41:3086   
  42:129      44:3        46:1454     47:3        49:343      50:535    
  52:13       54:6        55:11       56:3        57:32       58:966    
  59:495      60:278      61:1202     62:972      63:1996     64:4198   
  65:2274     66:4497     67:2022     68:1146     69:3184     70:910    
  71:465      72:1817     74:2591     75:493      76:317      77:959    
  78:1007     79:498      80:1210     81:897      82:666      83:548    
  84:513      85:1205     86:408      87:900      88:342      89:1623   
  90:297      91:4657     92:516      93:1376     94:1461     95:1160   
  96:377      97:316      98:844      99:37      100:6       101:168    
 103:929     106:66      107:180     108:218     109:1275    110:759    
 111:901     112:445     113:593     114:652     115:780     116:908    
 117:724     118:907     119:1207    120:350     121:696     122:1665   
 123:1099    124:1363    125:1263    128:561     129:189     130:256    
 131:595     132:173     133:21      134:242     135:62      136:212    
 137:176     138:351     139:145     140:494     141:244     142:385    
 143:399     144:513     145:66      146:485     147:243     148:748    
 149:298     150:157     151:176     152:460     153:171     154:7      
 155:430     156:215     157:379     158:176     159:525     160:343    
 161:248     162:343     163:190     164:555     165:391     166:562    
 167:464     168:819     169:127     170:844     171:124     172:4      
 173:1721    174:582     175:436     176:437     177:619     178:1310   
 180:1199    181:73      182:777     183:279     184:445     185:1      
 186:2136    187:1006    188:1158    189:1688    190:5498    192:5996   
 193:5608    194:4622    195:3589    196:1292    197:123     198:3617   
 199:4487    200:5805    201:1901    202:8463    203:8589    204:4342   
 205:2476    206:2752    207:2781    208:4053    209:3599    210:2764   
 211:1471    212:2008    213:1908    214:876     215:109     216:5079   
 217:1524    218:537     219:324     220:1228    221:557     222:325    
 223:329    

End of report



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