Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Mar 23 13:58:56 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 24 Mar, 2012

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

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

BGP routing table entries examined:                              404075
    Prefixes after maximum aggregation:                          171377
    Deaggregation factor:                                          2.36
    Unique aggregates announced to Internet:                     195407
Total ASes present in the Internet Routing Table:                 40484
    Prefixes per ASN:                                              9.98
Origin-only ASes present in the Internet Routing Table:           32928
Origin ASes announcing only one prefix:                           15486
Transit ASes present in the Internet Routing Table:                5438
Transit-only ASes present in the Internet Routing Table:            143
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:               454
    Unregistered ASNs in the Routing Table:                         221
Number of 32-bit ASNs allocated by the RIRs:                       2330
Number of 32-bit ASNs visible in the Routing Table:                2118
Prefixes from 32-bit ASNs in the Routing Table:                    5181
Special use prefixes present in the Routing Table:                    2
Prefixes being announced from unallocated address space:            893
Number of addresses announced to Internet:                   2527640720
    Equivalent to 150 /8s, 168 /16s and 188 /24s
    Percentage of available address space announced:               68.2
    Percentage of allocated address space announced:               68.2
    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:      172567

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

Prefixes being announced by APNIC Region ASes:                    98560
    Total APNIC prefixes after maximum aggregation:               32033
    APNIC Deaggregation factor:                                    3.08
Prefixes being announced from the APNIC address blocks:           94960
    Unique aggregates announced from the APNIC address blocks:    39434
APNIC Region origin ASes present in the Internet Routing Table:    4677
    APNIC Prefixes per ASN:                                       20.30
APNIC Region origin ASes announcing only one prefix:               1235
APNIC Region transit ASes present in the Internet Routing Table:    731
Average APNIC Region AS path length visible:                        4.6
    Max APNIC Region AS path length visible:                         18
Number of APNIC region 32-bit ASNs visible in the Routing Table:    167
Number of APNIC addresses announced to Internet:              641283424
    Equivalent to 38 /8s, 57 /16s and 53 /24s
    Percentage of available APNIC address space announced:         81.3

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:                    150469
    Total ARIN prefixes after maximum aggregation:                75801
    ARIN Deaggregation factor:                                     1.99
Prefixes being announced from the ARIN address blocks:           121859
    Unique aggregates announced from the ARIN address blocks:     49895
ARIN Region origin ASes present in the Internet Routing Table:    14936
    ARIN Prefixes per ASN:                                         8.16
ARIN Region origin ASes announcing only one prefix:                5675
ARIN Region transit ASes present in the Internet Routing Table:    1576
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:               805163776
    Equivalent to 47 /8s, 253 /16s and 211 /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:                    101472
    Total RIPE prefixes after maximum aggregation:                53082
    RIPE Deaggregation factor:                                     1.91
Prefixes being announced from the RIPE address blocks:            92826
    Unique aggregates announced from the RIPE address blocks:     57160
RIPE Region origin ASes present in the Internet Routing Table:    16364
    RIPE Prefixes per ASN:                                         5.67
RIPE Region origin ASes announcing only one prefix:                7977
RIPE Region transit ASes present in the Internet Routing Table:    2638
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:    1437
Number of RIPE addresses announced to Internet:               502099720
    Equivalent to 29 /8s, 237 /16s and 111 /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:                   39258
    Total LACNIC prefixes after maximum aggregation:               8148
    LACNIC Deaggregation factor:                                   4.82
Prefixes being announced from the LACNIC address blocks:          39012
    Unique aggregates announced from the LACNIC address blocks:   19722
LACNIC Region origin ASes present in the Internet Routing Table:   1576
    LACNIC Prefixes per ASN:                                      24.75
LACNIC Region origin ASes announcing only one prefix:               436
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:                        17
Number of LACNIC region 32-bit ASNs visible in the Routing Table:   494
Number of LACNIC addresses announced to Internet:              98599560
    Equivalent to 5 /8s, 224 /16s and 130 /24s
    Percentage of available LACNIC address space announced:        65.3

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:                   8829
    Total AfriNIC prefixes after maximum aggregation:              2122
    AfriNIC Deaggregation factor:                                  4.16
Prefixes being announced from the AfriNIC address blocks:          6909
    Unique aggregates announced from the AfriNIC address blocks:   2226
AfriNIC Region origin ASes present in the Internet Routing Table:   525
    AfriNIC Prefixes per ASN:                                     13.16
AfriNIC Region origin ASes announcing only one prefix:              163
AfriNIC Region transit ASes present in the Internet Routing Table:  119
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:    4
Number of AfriNIC addresses announced to Internet:             31512064
    Equivalent to 1 /8s, 224 /16s and 214 /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     2491      11109         992   Korea Telecom (KIX)
17974     1758        503          64   PT TELEKOMUNIKASI INDONESIA
 7545     1659        303          90   TPG Internet Pty Ltd
 4755     1574        386         160   TATA Communications formerly 
 9583     1238         95         540   Sify Limited
 9829     1207       1025          29   BSNL National Internet Backbo
 7552     1167       1062          11   Vietel Corporation
 4808     1097       2048         314   CNCGROUP IP network: China169
24560     1014        384         166   Bharti Airtel Ltd., Telemedia
18101      948        130         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
 7029     3378        990         155   Windstream Communications Inc
 6389     3372       3807         198   bellsouth.net, inc. 
 4323     2977       1060         385   Time Warner Telecom
18566     2093        383         179   Covad Communications 
 1785     1885        680         128   PaeTec Communications, Inc.
20115     1633       1558         628   Charter Communications 
22773     1547       2910         111   Cox Communications, Inc.
30036     1402        253         744   Mediacom Communications Corp 
 7018     1279       9776         833   AT&T WorldNet Services
11492     1165        212         413   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     1427         97          13   EUnet/RELCOM Autonomous Syste
15557     1034       2247          55   LDCOM NETWORKS
31148      672         37           9   FreeNet ISP
34984      666        188         174   BILISIM TELEKOM
12479      644        653          56   Uni2 Autonomous System
 6830      641       1943         412   UPC Distribution Services
20940      632        203         488   Akamai Technologies European 
 8551      576        360          81   Bezeq International
 3320      532       8442         398   Deutsche Telekom AG

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     1807        329         130   TVCABLE BOGOTA 
28573     1729       1099          60   NET Servicos de Comunicao S.A
 8151     1495       3017         354   UniNet S.A. de C.V. 
 7303     1351        826         190   Telecom Argentina Stet-France
26615      901        684          29   Tim Brasil S.A.
27947      687         69         111   Telconet S.A
11172      636         91          73   Servicios Alestra S.A de C.V 
22047      584        326          15   VTR PUNTO NET S.A. 
 3816      561        238          98   Empresa Nacional de Telecomun
 6503      559        418          65   AVANTEL, S.A. 

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     1260        958          13   TEDATA
24863      844        274          37   LINKdotNET AS number
 6713      489        649          18   Itissalat Al-MAGHRIB
 3741      271        923         228   The Internet Solution 
15706      227         32           6   Sudatel Internet Exchange Aut
12258      197         28          62   Vodacom Internet Company 
24835      178         80           8   RAYA Telecom - Egypt
33776      158         12          20   Starcomms Nigeria Limited
36923      157         20           4   Swift Networks Limited
16637      156        647          81   MTN Network Solutions

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
 7029     3378        990         155   Windstream Communications Inc
 6389     3372       3807         198   bellsouth.net, inc. 
 4323     2977       1060         385   Time Warner Telecom
 4766     2491      11109         992   Korea Telecom (KIX)
18566     2093        383         179   Covad Communications 
 1785     1885        680         128   PaeTec Communications, Inc.
10620     1807        329         130   TVCABLE BOGOTA 
 8402     1773        544          16   Corbina telecom
17974     1758        503          64   PT TELEKOMUNIKASI INDONESIA
28573     1729       1099          60   NET Servicos de Comunicao S.A

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

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

  ASN   No of nets  Net Savings Description
 6389      3372        3174      bellsouth.net, inc. 
 4323      2977        2592      Time Warner Telecom
18566      2093        1914      Covad Communications 
 1785      1885        1757      PaeTec Communications, Inc.
 8402      1773        1757      Corbina telecom
17974      1758        1694      PT TELEKOMUNIKASI INDONESIA
10620      1807        1677      TVCABLE BOGOTA 
28573      1729        1669      NET Servicos de Comunicao S.A
 7545      1659        1569      TPG Internet Pty Ltd
 4766      2491        1499      Korea Telecom (KIX)

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         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, 
16476   UNALLOCATED  12.46.27.0/24         7018       AT&T WorldNet Servic

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      /12:234     
/13:458     /14:824     /15:1477    /16:12183   /17:6238    /18:10432   
/19:20530   /20:28718   /21:29647   /22:40184   /23:37536   /24:211741  
/25:1218    /26:1456    /27:797     /28:167     /29:59      /30:17      
/31:0       /32:19      

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

  ASN   No of nets  Total ann.   Description
 7029     3038          3378      Windstream Communications Inc
 6389     2088          3372      bellsouth.net, inc. 
18566     2042          2093      Covad Communications 
 4323     1808          2977      Time Warner Telecom
 8402     1750          1773      Corbina telecom
10620     1704          1807      TVCABLE BOGOTA 
30036     1350          1402      Mediacom Communications Corp 
11492     1128          1165      Cable One 
 8452     1070          1260      TEDATA
 1785     1066          1885      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       2:752       4:14        6:3         8:392      12:1973   
  13:1        14:600      15:12       16:3        17:7        20:8      
  23:147      24:1754     27:1244     31:936      32:62       33:2      
  34:2        36:8        37:295      38:781      40:120      41:3007   
  42:128      44:3        46:1453     47:3        49:342      50:625    
  52:13       54:6        55:11       56:3        57:37       58:960    
  59:493      60:278      61:1205     62:980      63:1992     64:4344   
  65:2276     66:4826     67:2007     68:1147     69:3185     70:903    
  71:437      72:1804     74:2705     75:491      76:320      77:965    
  78:982      79:502      80:1235     81:908      82:656      83:553    
  84:615      85:1191     86:723      87:915      88:343      89:1612   
  90:296      91:4632     92:519      93:1490     94:1454     95:1159   
  96:375      97:386      98:826      99:38      100:6       101:154    
 103:920     106:64      107:178     108:210     109:1551    110:754    
 111:900     112:444     113:558     114:630     115:767     116:908    
 117:730     118:908     119:1205    120:338     121:695     122:1661   
 123:1095    124:1363    125:1260    128:554     129:190     130:264    
 131:595     132:173     133:21      134:242     135:63      136:212    
 137:194     138:275     139:145     140:494     141:241     142:388    
 143:404     144:500     145:69      146:489     147:243     148:723    
 149:295     150:157     151:176     152:459     153:171     154:7      
 155:429     156:213     157:380     158:163     159:521     160:326    
 161:249     162:343     163:186     164:546     165:392     166:562    
 167:463     168:859     169:148     170:844     171:123     172:2      
 173:1836    174:734     175:434     176:461     177:591     178:1289   
 180:1125    181:73      182:769     183:277     184:441     185:1      
 186:2137    187:868     188:1147    189:1189    190:5547    192:5993   
 193:5595    194:4566    195:3640    196:1282    197:183     198:3620   
 199:4475    200:5767    201:1656    202:8463    203:8596    204:4353   
 205:2465    206:2804    207:2832    208:4050    209:3687    210:2757   
 211:1467    212:1965    213:1906    214:872     215:108     216:5091   
 217:1526    218:538     219:333     220:1230    221:552     222:325    
 223:326    

End of report



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