Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Apr 27 13:44:27 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 28 Apr, 2012

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

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

BGP routing table entries examined:                              407208
    Prefixes after maximum aggregation:                          172996
    Deaggregation factor:                                          2.35
    Unique aggregates announced to Internet:                     198106
Total ASes present in the Internet Routing Table:                 40826
    Prefixes per ASN:                                              9.97
Origin-only ASes present in the Internet Routing Table:           33106
Origin ASes announcing only one prefix:                           15607
Transit ASes present in the Internet Routing Table:                5451
Transit-only ASes present in the Internet Routing Table:            135
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:               394
    Unregistered ASNs in the Routing Table:                         128
Number of 32-bit ASNs allocated by the RIRs:                       2635
Number of 32-bit ASNs visible in the Routing Table:                2269
Prefixes from 32-bit ASNs in the Routing Table:                    5659
Special use prefixes present in the Routing Table:                    2
Prefixes being announced from unallocated address space:            110
Number of addresses announced to Internet:                   2540346576
    Equivalent to 151 /8s, 106 /16s and 156 /24s
    Percentage of available address space announced:               68.5
    Percentage of allocated address space announced:               68.6
    Percentage of available address space allocated:               99.9
    Percentage of address space in use by end-sites:               92.5
Total number of prefixes smaller than registry allocations:      173699

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

Prefixes being announced by APNIC Region ASes:                    99521
    Total APNIC prefixes after maximum aggregation:               32245
    APNIC Deaggregation factor:                                    3.09
Prefixes being announced from the APNIC address blocks:           96009
    Unique aggregates announced from the APNIC address blocks:    39862
APNIC Region origin ASes present in the Internet Routing Table:    4684
    APNIC Prefixes per ASN:                                       20.50
APNIC Region origin ASes announcing only one prefix:               1238
APNIC Region transit ASes present in the Internet Routing Table:    734
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:    190
Number of APNIC addresses announced to Internet:              644227680
    Equivalent to 38 /8s, 102 /16s and 34 /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:                    150278
    Total ARIN prefixes after maximum aggregation:                76417
    ARIN Deaggregation factor:                                     1.97
Prefixes being announced from the ARIN address blocks:           121331
    Unique aggregates announced from the ARIN address blocks:     50436
ARIN Region origin ASes present in the Internet Routing Table:    15053
    ARIN Prefixes per ASN:                                         8.06
ARIN Region origin ASes announcing only one prefix:                5724
ARIN Region transit ASes present in the Internet Routing Table:    1581
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          30
Number of ARIN region 32-bit ASNs visible in the Routing Table:      17
Number of ARIN addresses announced to Internet:               807268032
    Equivalent to 48 /8s, 29 /16s and 238 /24s
    Percentage of available ARIN address space announced:          64.4

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:                    101788
    Total RIPE prefixes after maximum aggregation:                53879
    RIPE Deaggregation factor:                                     1.89
Prefixes being announced from the RIPE address blocks:            93665
    Unique aggregates announced from the RIPE address blocks:     58385
RIPE Region origin ASes present in the Internet Routing Table:    16520
    RIPE Prefixes per ASN:                                         5.67
RIPE Region origin ASes announcing only one prefix:                8040
RIPE Region transit ASes present in the Internet Routing Table:    2627
Average RIPE Region AS path length visible:                         4.9
    Max RIPE Region AS path length visible:                          28
Number of RIPE region 32-bit ASNs visible in the Routing Table:    1528
Number of RIPE addresses announced to Internet:               510941832
    Equivalent to 30 /8s, 116 /16s and 90 /24s
    Percentage of available RIPE address space announced:          82.3

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:                   40893
    Total LACNIC prefixes after maximum aggregation:               8250
    LACNIC Deaggregation factor:                                   4.96
Prefixes being announced from the LACNIC address blocks:          40763
    Unique aggregates announced from the LACNIC address blocks:   20273
LACNIC Region origin ASes present in the Internet Routing Table:   1592
    LACNIC Prefixes per ASN:                                      25.60
LACNIC Region origin ASes announcing only one prefix:               439
LACNIC Region transit ASes present in the Internet Routing Table:   300
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:   529
Number of LACNIC addresses announced to Internet:              99745160
    Equivalent to 5 /8s, 241 /16s and 253 /24s
    Percentage of available LACNIC address space announced:        66.1

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:                   8894
    Total AfriNIC prefixes after maximum aggregation:              2137
    AfriNIC Deaggregation factor:                                  4.16
Prefixes being announced from the AfriNIC address blocks:          6962
    Unique aggregates announced from the AfriNIC address blocks:   2224
AfriNIC Region origin ASes present in the Internet Routing Table:   534
    AfriNIC Prefixes per ASN:                                     13.04
AfriNIC Region origin ASes announcing only one prefix:              166
AfriNIC Region transit ASes present in the Internet Routing Table:  120
Average AfriNIC Region AS path length visible:                      4.6
    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:             31785728
    Equivalent to 1 /8s, 229 /16s and 3 /24s
    Percentage of available AfriNIC address space announced:       47.4

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     2485      11112        1010   Korea Telecom (KIX)
17974     1822        509          71   PT TELEKOMUNIKASI INDONESIA
 7545     1679        301          88   TPG Internet Pty Ltd
 4755     1584        386         158   TATA Communications formerly 
 9829     1261       1069          30   BSNL National Internet Backbo
 7552     1169       1062          11   Vietel Corporation
 9583     1145         84         490   Sify Limited
 4808     1111       2050         319   CNCGROUP IP network: China169
24560     1027        385         167   Bharti Airtel Ltd., Telemedia
 9498      954        291          65   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     3425       3807         194   bellsouth.net, inc. 
 7029     3368        986         158   Windstream Communications Inc
18566     2091        382         179   Covad Communications 
 1785     1906        680         131   PaeTec Communications, Inc.
20115     1639       1566         619   Charter Communications 
 4323     1599       1044         383   Time Warner Telecom
22773     1580       2910         114   Cox Communications, Inc.
30036     1420        261         768   Mediacom Communications Corp 
 7018     1249       9774         818   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     1679        544          16   Corbina telecom
 2118     1304         97          14   EUnet/RELCOM Autonomous Syste
31148      681         37           9   FreeNet ISP
34984      681        188         173   BILISIM TELEKOM
 6830      655       2215         426   UPC Distribution Services
12479      650        668          66   Uni2 Autonomous System
20940      636        206         498   Akamai Technologies European 
 8551      571        360          80   Bezeq International
 3320      531       8441         397   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     1832        329         171   TVCABLE BOGOTA 
28573     1804       1114          62   NET Servicos de Comunicao S.A
 6503     1533        418          65   AVANTEL, S.A. 
 8151     1486       3000         345   UniNet S.A. de C.V. 
 7303     1362        829         187   Telecom Argentina Stet-France
26615      903        761          33   Tim Brasil S.A.
27947      685         74          98   Telconet S.A
11172      639         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     1305        958          13   TEDATA
24863      840        274          35   LINKdotNET AS number
 6713      493        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      174        666          83   MTN Network Solutions
15706      169         32           6   Sudatel Internet Exchange Aut
29571      157         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     3425       3807         194   bellsouth.net, inc. 
 7029     3368        986         158   Windstream Communications Inc
 4766     2485      11112        1010   Korea Telecom (KIX)
18566     2091        382         179   Covad Communications 
 1785     1906        680         131   PaeTec Communications, Inc.
10620     1832        329         171   TVCABLE BOGOTA 
17974     1822        509          71   PT TELEKOMUNIKASI INDONESIA
28573     1804       1114          62   NET Servicos de Comunicao S.A
 7545     1679        301          88   TPG Internet Pty Ltd
 8402     1679        544          16   Corbina telecom

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      3368        3210      Windstream Communications Inc
18566      2091        1912      Covad Communications 
 1785      1906        1775      PaeTec Communications, Inc.
17974      1822        1751      PT TELEKOMUNIKASI INDONESIA
28573      1804        1742      NET Servicos de Comunicao S.A
 8402      1679        1663      Corbina telecom
10620      1832        1661      TVCABLE BOGOTA 
 7545      1679        1591      TPG Internet Pty Ltd
 4766      2485        1475      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
5.3.0.0/16           41733     JSC "Z-Telecom"
5.8.184.0/21         29286     Skylogic Italia Autonomous Sy
5.16.0.0/14          41733     JSC "Z-Telecom"
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

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     /15:1489    /16:12244   /17:6243    /18:10539   
/19:20613   /20:29018   /21:30083   /22:40581   /23:38021   /24:213032  
/25:1196    /26:1429    /27:784     /28:166     /29:67      /30:17      
/31:0       /32:19      

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

  ASN   No of nets  Total ann.   Description
 7029     3026          3368      Windstream Communications Inc
 6389     2143          3425      bellsouth.net, inc. 
18566     2040          2091      Covad Communications 
10620     1709          1832      TVCABLE BOGOTA 
 8402     1657          1679      Corbina telecom
30036     1364          1420      Mediacom Communications Corp 
 6503     1291          1533      AVANTEL, S.A. 
11492     1149          1186      Cable One 
 8452     1105          1305      TEDATA
 1785     1072          1906      PaeTec Communications, Inc.

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

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

   1:539       2:550       4:14        6:3         8:406      12:1999   
  13:1        14:611      15:12       16:3        17:5        20:23     
  23:167      24:1761     27:1273     31:952      32:57       33:2      
  34:2        36:8        37:421      38:800      40:120      41:3112   
  42:135      44:3        46:1481     47:3        49:404      50:538    
  52:13       54:8        55:11       56:3        57:31       58:965    
  59:520      60:254      61:1277     62:976      63:1990     64:4173   
  65:2255     66:4486     67:2021     68:1166     69:3189     70:903    
  71:466      72:1825     74:2602     75:494      76:318      77:941    
  78:1012     79:487      80:1209     81:902      82:673      83:550    
  84:482      85:1210     86:412      87:929      88:340      89:1630   
  90:291      91:4769     92:520      93:1507     94:1510     95:894    
  96:358      97:315      98:895      99:37      100:7       101:181    
 103:1030    106:102     107:191     108:268     109:1306    110:746    
 111:923     112:454     113:600     114:642     115:807     116:929    
 117:719     118:909     119:1230    120:354     121:692     122:1676   
 123:1104    124:1364    125:1243    128:562     129:196     130:255    
 131:626     132:180     133:22      134:242     135:62      136:214    
 137:177     138:355     139:163     140:492     141:242     142:407    
 143:392     144:523     145:74      146:495     147:279     148:768    
 149:306     150:159     151:181     152:464     153:172     154:12     
 155:399     156:215     157:375     158:179     159:539     160:338    
 161:262     162:348     163:191     164:580     165:399     166:573    
 167:468     168:820     169:128     170:859     171:127     172:2      
 173:1756    174:570     175:437     176:686     177:654     178:1349   
 180:1192    181:79      182:826     183:289     184:462     185:1      
 186:2247    187:1056    188:1239    189:1791    190:5513    192:6010   
 193:5539    194:4658    195:3600    196:1271    197:129     198:3660   
 199:4543    200:5806    201:1934    202:8518    203:8599    204:4327   
 205:2498    206:2746    207:2796    208:4057    209:3621    210:2736   
 211:1478    212:1983    213:1927    214:848     215:104     216:5131   
 217:1533    218:545     219:318     220:1230    221:558     222:323    
 223:336    

End of report



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