Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Apr 20 13:44:07 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 21 Apr, 2012

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

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

BGP routing table entries examined:                              406332
    Prefixes after maximum aggregation:                          172729
    Deaggregation factor:                                          2.35
    Unique aggregates announced to Internet:                     197504
Total ASes present in the Internet Routing Table:                 40749
    Prefixes per ASN:                                              9.97
Origin-only ASes present in the Internet Routing Table:           33074
Origin ASes announcing only one prefix:                           15626
Transit ASes present in the Internet Routing Table:                5448
Transit-only ASes present in the Internet Routing Table:            136
Average AS path length visible in the Internet Routing Table:       4.5
    Max AS path length visible:                                      64
    Max AS path prepend of ASN ( 9902)                               56
Prefixes from unregistered ASNs in the Routing Table:               391
    Unregistered ASNs in the Routing Table:                         128
Number of 32-bit ASNs allocated by the RIRs:                       2611
Number of 32-bit ASNs visible in the Routing Table:                2227
Prefixes from 32-bit ASNs in the Routing Table:                    5570
Special use prefixes present in the Routing Table:                    2
Prefixes being announced from unallocated address space:            119
Number of addresses announced to Internet:                   2538235344
    Equivalent to 151 /8s, 74 /16s and 101 /24s
    Percentage of available address space announced:               68.5
    Percentage of allocated address space announced:               68.5
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               92.4
Total number of prefixes smaller than registry allocations:      173084

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

Prefixes being announced by APNIC Region ASes:                    99600
    Total APNIC prefixes after maximum aggregation:               32224
    APNIC Deaggregation factor:                                    3.09
Prefixes being announced from the APNIC address blocks:           96078
    Unique aggregates announced from the APNIC address blocks:    39691
APNIC Region origin ASes present in the Internet Routing Table:    4681
    APNIC Prefixes per ASN:                                       20.53
APNIC Region origin ASes announcing only one prefix:               1238
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:    185
Number of APNIC addresses announced to Internet:              644102752
    Equivalent to 38 /8s, 100 /16s and 58 /24s
    Percentage of available APNIC address space announced:         81.7

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:                    149874
    Total ARIN prefixes after maximum aggregation:                76295
    ARIN Deaggregation factor:                                     1.96
Prefixes being announced from the ARIN address blocks:           121117
    Unique aggregates announced from the ARIN address blocks:     50365
ARIN Region origin ASes present in the Internet Routing Table:    15044
    ARIN Prefixes per ASN:                                         8.05
ARIN Region origin ASes announcing only one prefix:                5734
ARIN Region transit ASes present in the Internet Routing Table:    1585
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          29
Number of ARIN region 32-bit ASNs visible in the Routing Table:      17
Number of ARIN addresses announced to Internet:               807297728
    Equivalent to 48 /8s, 30 /16s and 98 /24s
    Percentage of available ARIN address space announced:          64.2

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:                    101440
    Total RIPE prefixes after maximum aggregation:                53739
    RIPE Deaggregation factor:                                     1.89
Prefixes being announced from the RIPE address blocks:            93359
    Unique aggregates announced from the RIPE address blocks:     58202
RIPE Region origin ASes present in the Internet Routing Table:    16502
    RIPE Prefixes per ASN:                                         5.66
RIPE Region origin ASes announcing only one prefix:                8044
RIPE Region transit ASes present in the Internet Routing Table:    2626
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:    1495
Number of RIPE addresses announced to Internet:               509709960
    Equivalent to 30 /8s, 97 /16s and 142 /24s
    Percentage of available RIPE address space announced:          82.1

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:                   40646
    Total LACNIC prefixes after maximum aggregation:               8266
    LACNIC Deaggregation factor:                                   4.92
Prefixes being announced from the LACNIC address blocks:          40505
    Unique aggregates announced from the LACNIC address blocks:   20214
LACNIC Region origin ASes present in the Internet Routing Table:   1586
    LACNIC Prefixes per ASN:                                      25.54
LACNIC Region origin ASes announcing only one prefix:               441
LACNIC Region transit ASes present in the Internet Routing Table:   299
Average LACNIC Region AS path length visible:                       4.4
    Max LACNIC Region AS path length visible:                        24
Number of LACNIC region 32-bit ASNs visible in the Routing Table:   525
Number of LACNIC addresses announced to Internet:              99324808
    Equivalent to 5 /8s, 235 /16s and 147 /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:                   9028
    Total AfriNIC prefixes after maximum aggregation:              2137
    AfriNIC Deaggregation factor:                                  4.22
Prefixes being announced from the AfriNIC address blocks:          7079
    Unique aggregates announced from the AfriNIC address blocks:   2166
AfriNIC Region origin ASes present in the Internet Routing Table:   534
    AfriNIC Prefixes per ASN:                                     13.26
AfriNIC Region origin ASes announcing only one prefix:              169
AfriNIC Region transit ASes present in the Internet Routing Table:  116
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:             31771648
    Equivalent to 1 /8s, 228 /16s and 204 /24s
    Percentage of available AfriNIC address space announced:       47.3

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     2497      11113        1012   Korea Telecom (KIX)
17974     1799        503          63   PT TELEKOMUNIKASI INDONESIA
 7545     1677        301          88   TPG Internet Pty Ltd
 4755     1587        388         166   TATA Communications formerly 
 9829     1249       1069          30   BSNL National Internet Backbo
 9583     1227         94         528   Sify Limited
 7552     1170       1062          11   Vietel Corporation
 4808     1105       2049         318   CNCGROUP IP network: China169
24560     1024        385         167   Bharti Airtel Ltd., Telemedia
 9498      947        291          64   BHARTI Airtel Ltd.

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     3427       3807         195   bellsouth.net, inc. 
 7029     3369        985         157   Windstream Communications Inc
18566     2091        382         179   Covad Communications 
 1785     1903        680         130   PaeTec Communications, Inc.
20115     1640       1566         619   Charter Communications 
 4323     1601       1044         381   Time Warner Telecom
22773     1576       2910         111   Cox Communications, Inc.
30036     1412        258         763   Mediacom Communications Corp 
 7018     1260       9775         819   AT&T WorldNet Services
11492     1186        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     1745        544          16   Corbina telecom
 2118     1304         97          14   EUnet/RELCOM Autonomous Syste
31148      680         37           9   FreeNet ISP
34984      679        188         175   BILISIM TELEKOM
 6830      657       2215         426   UPC Distribution Services
20940      649        206         501   Akamai Technologies European 
12479      647        666          63   Uni2 Autonomous System
 8551      572        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     1810        327         176   TVCABLE BOGOTA 
28573     1781       1107          59   NET Servicos de Comunicao S.A
 6503     1533        418          65   AVANTEL, S.A. 
 8151     1490       3018         350   UniNet S.A. de C.V. 
 7303     1362        829         191   Telecom Argentina Stet-France
26615      902        697          32   Tim Brasil S.A.
27947      683         74          98   Telconet S.A
11172      637         91          73   Servicios Alestra S.A de C.V 
22047      582        326          15   VTR PUNTO NET S.A. 
 3816      572        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     1314        958          13   TEDATA
24863      840        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 
24835      180         80           8   RAYA Telecom - Egypt
16637      171        666          83   MTN Network Solutions
33776      171         11          21   Starcomms Nigeria Limited
15706      169         32           6   Sudatel Internet Exchange Aut
29571      159         15          15   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     3427       3807         195   bellsouth.net, inc. 
 7029     3369        985         157   Windstream Communications Inc
 4766     2497      11113        1012   Korea Telecom (KIX)
18566     2091        382         179   Covad Communications 
 1785     1903        680         130   PaeTec Communications, Inc.
10620     1810        327         176   TVCABLE BOGOTA 
17974     1799        503          63   PT TELEKOMUNIKASI INDONESIA
28573     1781       1107          59   NET Servicos de Comunicao S.A
 8402     1745        544          16   Corbina telecom
 7545     1677        301          88   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      3369        3212      Windstream Communications Inc
18566      2091        1912      Covad Communications 
 1785      1903        1773      PaeTec Communications, Inc.
17974      1799        1736      PT TELEKOMUNIKASI INDONESIA
 8402      1745        1729      Corbina telecom
28573      1781        1722      NET Servicos de Comunicao S.A
10620      1810        1634      TVCABLE BOGOTA 
 7545      1677        1589      TPG Internet Pty Ltd
 4766      2497        1485      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
37.252.112.0/21      35094     Bredbandsfylket Troms AS

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     /14:829     /15:1484    /16:12227   /17:6271    /18:10543   
/19:20619   /20:28937   /21:29930   /22:40516   /23:37836   /24:212630  
/25:1194    /26:1429    /27:786     /28:166     /29:65      /30:17      
/31:0       /32:19      

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

  ASN   No of nets  Total ann.   Description
 7029     3027          3369      Windstream Communications Inc
 6389     2145          3427      bellsouth.net, inc. 
18566     2040          2091      Covad Communications 
 8402     1722          1745      Corbina telecom
10620     1695          1810      TVCABLE BOGOTA 
30036     1358          1412      Mediacom Communications Corp 
 6503     1291          1533      AVANTEL, S.A. 
11492     1149          1186      Cable One 
 8452     1116          1314      TEDATA
 1785     1071          1903      PaeTec Communications, Inc.

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

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

   1:538       2:755       4:14        6:3         8:402      12:2007   
  13:1        14:599      15:12       16:3        17:7        20:22     
  23:167      24:1770     27:1257     31:981      32:57       33:2      
  34:2        36:8        37:366      38:798      40:120      41:3164   
  42:134      44:3        46:1495     47:3        49:371      50:530    
  52:13       54:8        55:8        56:3        57:31       58:960    
  59:519      60:281      61:1265     62:981      63:1992     64:4169   
  65:2251     66:4491     67:2019     68:1167     69:3189     70:902    
  71:486      72:1819     74:2594     75:494      76:318      77:944    
  78:1006     79:485      80:1209     81:903      82:667      83:550    
  84:473      85:1209     86:412      87:922      88:345      89:1625   
  90:291      91:4737     92:525      93:1352     94:1463     95:1166   
  96:360      97:316      98:902      99:36      100:7       101:174    
 103:1007    106:102     107:188     108:235     109:1287    110:756    
 111:921     112:445     113:597     114:642     115:880     116:908    
 117:714     118:906     119:1231    120:354     121:798     122:1638   
 123:1079    124:1352    125:1248    128:546     129:193     130:252    
 131:591     132:179     133:22      134:242     135:62      136:212    
 137:176     138:355     139:147     140:491     141:245     142:387    
 143:400     144:523     145:69      146:494     147:280     148:758    
 149:295     150:158     151:175     152:464     153:171     154:9      
 155:435     156:215     157:380     158:174     159:523     160:338    
 161:262     162:350     163:187     164:571     165:394     166:573    
 167:466     168:822     169:127     170:858     171:126     172:2      
 173:1745    174:563     175:433     176:427     177:666     178:1334   
 180:1180    181:75      182:810     183:288     184:453     185:1      
 186:2211    187:1041    188:1183    189:1779    190:5507    192:5999   
 193:5544    194:4646    195:3593    196:1292    197:130     198:3652   
 199:4521    200:5801    201:1927    202:8520    203:8588    204:4327   
 205:2494    206:2752    207:2793    208:4055    209:3611    210:2763   
 211:1475    212:2017    213:1907    214:834     215:104     216:5110   
 217:1538    218:539     219:344     220:1227    221:556     222:322    
 223:336    

End of report



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