Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Apr 13 13:43:24 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 14 Apr, 2012

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

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

BGP routing table entries examined:                              405834
    Prefixes after maximum aggregation:                          172344
    Deaggregation factor:                                          2.35
    Unique aggregates announced to Internet:                     196881
Total ASes present in the Internet Routing Table:                 40680
    Prefixes per ASN:                                              9.98
Origin-only ASes present in the Internet Routing Table:           33028
Origin ASes announcing only one prefix:                           15596
Transit ASes present in the Internet Routing Table:                5439
Transit-only ASes present in the Internet Routing Table:            140
Average AS path length visible in the Internet Routing Table:       4.5
    Max AS path length visible:                                      69
    Max AS path prepend of ASN ( 9902)                               61
Prefixes from unregistered ASNs in the Routing Table:               386
    Unregistered ASNs in the Routing Table:                         124
Number of 32-bit ASNs allocated by the RIRs:                       2561
Number of 32-bit ASNs visible in the Routing Table:                2213
Prefixes from 32-bit ASNs in the Routing Table:                    5503
Special use prefixes present in the Routing Table:                    2
Prefixes being announced from unallocated address space:            114
Number of addresses announced to Internet:                   2536440016
    Equivalent to 151 /8s, 47 /16s and 0 /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:               92.3
Total number of prefixes smaller than registry allocations:      173014

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

Prefixes being announced by APNIC Region ASes:                    99593
    Total APNIC prefixes after maximum aggregation:               32244
    APNIC Deaggregation factor:                                    3.09
Prefixes being announced from the APNIC address blocks:           96034
    Unique aggregates announced from the APNIC address blocks:    39546
APNIC Region origin ASes present in the Internet Routing Table:    4672
    APNIC Prefixes per ASN:                                       20.56
APNIC Region origin ASes announcing only one prefix:               1235
APNIC Region transit ASes present in the Internet Routing Table:    729
Average APNIC Region AS path length visible:                        4.7
    Max APNIC Region AS path length visible:                         20
Number of APNIC region 32-bit ASNs visible in the Routing Table:    181
Number of APNIC addresses announced to Internet:              643217632
    Equivalent to 38 /8s, 86 /16s and 184 /24s
    Percentage of available APNIC address space announced:         81.6

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:                    149618
    Total ARIN prefixes after maximum aggregation:                76108
    ARIN Deaggregation factor:                                     1.97
Prefixes being announced from the ARIN address blocks:           120921
    Unique aggregates announced from the ARIN address blocks:     50252
ARIN Region origin ASes present in the Internet Routing Table:    15025
    ARIN Prefixes per ASN:                                         8.05
ARIN Region origin ASes announcing only one prefix:                5723
ARIN Region transit ASes present in the Internet Routing Table:    1582
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:               807007168
    Equivalent to 48 /8s, 25 /16s and 243 /24s
    Percentage of available ARIN address space announced:          64.1

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:                    101433
    Total RIPE prefixes after maximum aggregation:                53576
    RIPE Deaggregation factor:                                     1.89
Prefixes being announced from the RIPE address blocks:            93324
    Unique aggregates announced from the RIPE address blocks:     58041
RIPE Region origin ASes present in the Internet Routing Table:    16482
    RIPE Prefixes per ASN:                                         5.66
RIPE Region origin ASes announcing only one prefix:                8037
RIPE Region transit ASes present in the Internet Routing Table:    2629
Average RIPE Region AS path length visible:                         5.0
    Max RIPE Region AS path length visible:                          30
Number of RIPE region 32-bit ASNs visible in the Routing Table:    1489
Number of RIPE addresses announced to Internet:               509292424
    Equivalent to 30 /8s, 91 /16s and 47 /24s
    Percentage of available RIPE address space announced:          82.0

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:                   40582
    Total LACNIC prefixes after maximum aggregation:               8239
    LACNIC Deaggregation factor:                                   4.93
Prefixes being announced from the LACNIC address blocks:          40429
    Unique aggregates announced from the LACNIC address blocks:   20124
LACNIC Region origin ASes present in the Internet Routing Table:   1583
    LACNIC Prefixes per ASN:                                      25.54
LACNIC Region origin ASes announcing only one prefix:               435
LACNIC Region transit ASes present in the Internet Routing Table:   296
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:   521
Number of LACNIC addresses announced to Internet:              99314568
    Equivalent to 5 /8s, 235 /16s and 107 /24s
    Percentage of available LACNIC address space announced:        65.8

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:                   8935
    Total AfriNIC prefixes after maximum aggregation:              2109
    AfriNIC Deaggregation factor:                                  4.24
Prefixes being announced from the AfriNIC address blocks:          7015
    Unique aggregates announced from the AfriNIC address blocks:   2152
AfriNIC Region origin ASes present in the Internet Routing Table:   527
    AfriNIC Prefixes per ASN:                                     13.31
AfriNIC Region origin ASes announcing only one prefix:              166
AfriNIC Region transit ASes present in the Internet Routing Table:  117
Average AfriNIC Region AS path length visible:                      4.4
    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:             31657216
    Equivalent to 1 /8s, 227 /16s and 13 /24s
    Percentage of available AfriNIC address space announced:       47.2

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     2488      11113        1009   Korea Telecom (KIX)
17974     1799        503          63   PT TELEKOMUNIKASI INDONESIA
 7545     1663        301          86   TPG Internet Pty Ltd
 4755     1590        388         166   TATA Communications formerly 
 9583     1245         95         542   Sify Limited
 9829     1235       1041          30   BSNL National Internet Backbo
 7552     1170       1062          11   Vietel Corporation
 4808     1090       2050         316   CNCGROUP IP network: China169
24560     1023        385         167   Bharti Airtel Ltd., Telemedia
18101      947        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     3428       3807         195   bellsouth.net, inc. 
 7029     3385        985         157   Windstream Communications Inc
18566     2091        382         179   Covad Communications 
 1785     1896        680         129   PaeTec Communications, Inc.
20115     1642       1565         619   Charter Communications 
 4323     1600       1044         380   Time Warner Telecom
22773     1576       2910         111   Cox Communications, Inc.
30036     1446        263         757   Mediacom Communications Corp 
 7018     1278       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     1759        544          16   Corbina telecom
 2118     1304         97          14   EUnet/RELCOM Autonomous Syste
34984      681        188         175   BILISIM TELEKOM
31148      679         37           9   FreeNet ISP
12479      655        660          61   Uni2 Autonomous System
20940      641        204         494   Akamai Technologies European 
 6830      639       1943         410   UPC Distribution Services
 8551      574        360          81   Bezeq International
 3320      533       8442         399   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     1803        326         174   TVCABLE BOGOTA 
28573     1777       1107          59   NET Servicos de Comunicao S.A
 6503     1533        418          65   AVANTEL, S.A. 
 8151     1481       3020         349   UniNet S.A. de C.V. 
 7303     1357        827         190   Telecom Argentina Stet-France
26615      903        697          32   Tim Brasil S.A.
27947      686         74          99   Telconet S.A
11172      637         91          73   Servicios Alestra S.A de C.V 
22047      583        326          15   VTR PUNTO NET S.A. 
 3816      571        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     1303        958          13   TEDATA
24863      848        274          35   LINKdotNET AS number
 6713      490        649          18   Itissalat Al-MAGHRIB
 3741      265        921         223   The Internet Solution 
12258      197         28          62   Vodacom Internet Company 
33776      195         12          24   Starcomms Nigeria Limited
24835      179         80           8   RAYA Telecom - Egypt
16637      173        666          83   MTN Network Solutions
15706      169         32           6   Sudatel Internet Exchange Aut
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     3428       3807         195   bellsouth.net, inc. 
 7029     3385        985         157   Windstream Communications Inc
 4766     2488      11113        1009   Korea Telecom (KIX)
18566     2091        382         179   Covad Communications 
 1785     1896        680         129   PaeTec Communications, Inc.
10620     1803        326         174   TVCABLE BOGOTA 
17974     1799        503          63   PT TELEKOMUNIKASI INDONESIA
28573     1777       1107          59   NET Servicos de Comunicao S.A
 8402     1759        544          16   Corbina telecom
 7545     1663        301          86   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      3385        3228      Windstream Communications Inc
18566      2091        1912      Covad Communications 
 1785      1896        1767      PaeTec Communications, Inc.
 8402      1759        1743      Corbina telecom
17974      1799        1736      PT TELEKOMUNIKASI INDONESIA
28573      1777        1718      NET Servicos de Comunicao S.A
10620      1803        1629      TVCABLE BOGOTA 
 7545      1663        1577      TPG Internet Pty Ltd
 4766      2488        1479      Korea Telecom (KIX)
 6503      1533        1468      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
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

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
27.112.114.0/24      23884     Proimage Engineering and Comm
37.230.96.0/21       35470     XL Network

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     
/13:460     /14:832     /15:1480    /16:12201   /17:6274    /18:10515   
/19:20631   /20:28864   /21:29877   /22:40551   /23:37803   /24:212316  
/25:1200    /26:1424    /27:777     /28:158     /29:60      /30:17      
/31:0       /32:19      

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

  ASN   No of nets  Total ann.   Description
 7029     3043          3385      Windstream Communications Inc
 6389     2146          3428      bellsouth.net, inc. 
18566     2040          2091      Covad Communications 
 8402     1736          1759      Corbina telecom
10620     1695          1803      TVCABLE BOGOTA 
30036     1392          1446      Mediacom Communications Corp 
 6503     1291          1533      AVANTEL, S.A. 
11492     1148          1185      Cable One 
 8452     1111          1303      TEDATA
 7011     1068          1183      Citizens Utilities 

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

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

   1:532       2:726       4:14        6:3         8:400      12:1990   
  13:1        14:600      15:12       16:3        17:7        20:8      
  23:159      24:1769     27:1270     31:978      32:57       33:2      
  34:2        36:8        37:342      38:795      40:120      41:3147   
  42:134      44:3        46:1463     47:3        49:383      50:535    
  52:13       54:7        55:9        56:3        57:31       58:962    
  59:521      60:282      61:1263     62:977      63:1990     64:4158   
  65:2253     66:4496     67:2029     68:1152     69:3153     70:906    
  71:472      72:1819     74:2596     75:494      76:318      77:964    
  78:1006     79:490      80:1190     81:903      82:661      83:548    
  84:490      85:1207     86:406      87:925      88:351      89:1631   
  90:297      91:4723     92:521      93:1389     94:1469     95:1146   
  96:355      97:318      98:892      99:37      100:7       101:169    
 103:969     106:105     107:185     108:226     109:1309    110:751    
 111:920     112:454     113:593     114:623     115:871     116:899    
 117:717     118:900     119:1217    120:349     121:806     122:1672   
 123:1089    124:1371    125:1265    128:561     129:190     130:253    
 131:599     132:173     133:21      134:242     135:62      136:212    
 137:177     138:355     139:147     140:489     141:244     142:386    
 143:396     144:514     145:69      146:490     147:277     148:765    
 149:301     150:160     151:176     152:464     153:172     154:7      
 155:429     156:215     157:379     158:177     159:522     160:337    
 161:259     162:352     163:190     164:572     165:395     166:571    
 167:463     168:816     169:127     170:856     171:127     172:4      
 173:1727    174:586     175:430     176:484     177:648     178:1333   
 180:1177    181:73      182:797     183:285     184:452     185:1      
 186:2209    187:1027    188:1190    189:1798    190:5495    192:5997   
 193:5545    194:4637    195:3580    196:1247    197:120     198:3624   
 199:4495    200:5795    201:1917    202:8512    203:8606    204:4343   
 205:2488    206:2748    207:2777    208:4046    209:3585    210:2761   
 211:1478    212:2002    213:1906    214:887     215:104     216:5092   
 217:1539    218:543     219:343     220:1225    221:556     222:323    
 223:334    

End of report



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