Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Sep 9 14:11:35 CDT 2011


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,
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 10 Sep, 2011

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

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

BGP routing table entries examined:                              370301
    Prefixes after maximum aggregation:                          167415
    Deaggregation factor:                                          2.21
    Unique aggregates announced to Internet:                     183735
Total ASes present in the Internet Routing Table:                 38737
    Prefixes per ASN:                                              9.56
Origin-only ASes present in the Internet Routing Table:           32130
Origin ASes announcing only one prefix:                           15446
Transit ASes present in the Internet Routing Table:                5210
Transit-only ASes present in the Internet Routing Table:            140
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      36
    Max AS path prepend of ASN (22394)                               33
Prefixes from unregistered ASNs in the Routing Table:              1208
    Unregistered ASNs in the Routing Table:                         697
Number of 32-bit ASNs allocated by the RIRs:                       1711
Number of 32-bit ASNs visible in the Routing Table:                1397
Prefixes from 32-bit ASNs in the Routing Table:                    3204
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            101
Number of addresses announced to Internet:                   2475335424
    Equivalent to 147 /8s, 138 /16s and 159 /24s
    Percentage of available address space announced:               66.8
    Percentage of allocated address space announced:               66.8
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               91.2
Total number of prefixes smaller than registry allocations:      154300

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

Prefixes being announced by APNIC Region ASes:                    93207
    Total APNIC prefixes after maximum aggregation:               30608
    APNIC Deaggregation factor:                                    3.05
Prefixes being announced from the APNIC address blocks:           89751
    Unique aggregates announced from the APNIC address blocks:    38014
APNIC Region origin ASes present in the Internet Routing Table:    4545
    APNIC Prefixes per ASN:                                       19.75
APNIC Region origin ASes announcing only one prefix:               1250
APNIC Region transit ASes present in the Internet Routing Table:    709
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         18
Number of APNIC region 32-bit ASNs visible in the Routing Table:     83
Number of APNIC addresses announced to Internet:              626012512
    Equivalent to 37 /8s, 80 /16s and 49 /24s
    Percentage of available APNIC address space announced:         79.4

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:                    143092
    Total ARIN prefixes after maximum aggregation:                73464
    ARIN Deaggregation factor:                                     1.95
Prefixes being announced from the ARIN address blocks:           114937
    Unique aggregates announced from the ARIN address blocks:     47325
ARIN Region origin ASes present in the Internet Routing Table:    14645
    ARIN Prefixes per ASN:                                         7.85
ARIN Region origin ASes announcing only one prefix:                5639
ARIN Region transit ASes present in the Internet Routing Table:    1554
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          36
Number of ARIN region 32-bit ASNs visible in the Routing Table:      12
Number of ARIN addresses announced to Internet:               804788864
    Equivalent to 47 /8s, 248 /16s and 26 /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:                     87865
    Total RIPE prefixes after maximum aggregation:                49993
    RIPE Deaggregation factor:                                     1.76
Prefixes being announced from the RIPE address blocks:            80959
    Unique aggregates announced from the RIPE address blocks:     53843
RIPE Region origin ASes present in the Internet Routing Table:    15959
    RIPE Prefixes per ASN:                                         5.07
RIPE Region origin ASes announcing only one prefix:                7952
RIPE Region transit ASes present in the Internet Routing Table:    2496
Average RIPE Region AS path length visible:                         4.6
    Max RIPE Region AS path length visible:                          33
Number of RIPE region 32-bit ASNs visible in the Routing Table:     993
Number of RIPE addresses announced to Internet:               488762880
    Equivalent to 29 /8s, 33 /16s and 238 /24s
    Percentage of available RIPE address space announced:          78.7

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:                   34454
    Total LACNIC prefixes after maximum aggregation:               7761
    LACNIC Deaggregation factor:                                   4.44
Prefixes being announced from the LACNIC address blocks:          33754
    Unique aggregates announced from the LACNIC address blocks:   17669
LACNIC Region origin ASes present in the Internet Routing Table:   1522
    LACNIC Prefixes per ASN:                                      22.18
LACNIC Region origin ASes announcing only one prefix:               452
LACNIC Region transit ASes present in the Internet Routing Table:   275
Average LACNIC Region AS path length visible:                       4.4
    Max LACNIC Region AS path length visible:                        19
Number of LACNIC region 32-bit ASNs visible in the Routing Table:   305
Number of LACNIC addresses announced to Internet:              88542336
    Equivalent to 5 /8s, 71 /16s and 12 /24s
    Percentage of available LACNIC address space announced:        58.6

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:                   8314
    Total AfriNIC prefixes after maximum aggregation:              2024
    AfriNIC Deaggregation factor:                                  4.11
Prefixes being announced from the AfriNIC address blocks:          6408
    Unique aggregates announced from the AfriNIC address blocks:   1991
AfriNIC Region origin ASes present in the Internet Routing Table:   480
    AfriNIC Prefixes per ASN:                                     13.35
AfriNIC Region origin ASes announcing only one prefix:              153
AfriNIC Region transit ASes present in the Internet Routing Table:  104
Average AfriNIC Region AS path length visible:                      4.7
    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:             27297024
    Equivalent to 1 /8s, 160 /16s and 133 /24s
    Percentage of available AfriNIC address space announced:       40.7

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     2508      11047         955   Korea Telecom (KIX)
17974     1985        516          31   PT TELEKOMUNIKASI INDONESIA
 7545     1581        301          83   TPG Internet Pty Ltd
 4755     1550        635         170   TATA Communications formerly 
24560     1176        336         192   Bharti Airtel Ltd., Telemedia
 9829     1152        989          28   BSNL National Internet Backbo
 9583     1079         80         503   Sify Limited
 4808     1077       2093         308   CNCGROUP IP network: China169
 7552     1050       1062          11   Vietel Corporation
17488      982        192         158   Hathway IP Over Cable Interne

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     3564       3817         226   bellsouth.net, inc. 
18566     1912        364         237   Covad Communications 
 1785     1822        680         122   PaeTec Communications, Inc.
 4323     1626       1085         395   Time Warner Telecom
20115     1591       1540         634   Charter Communications 
 7029     1483        995         231   Windstream Communications Inc
22773     1450       2906          99   Cox Communications, Inc.
19262     1394       4724         399   Verizon Global Networks 
 7018     1333       7050         874   AT&T WorldNet Services
30036     1327        244         687   Mediacom Communications Corp 

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
34984      544        107         178   BILISIM TELEKOM
 6830      526       1811         322   UPC Distribution Services
20940      500        154         388   Akamai Technologies European 
 3292      471       2079         405   TDC Tele Danmark
12479      468        594           8   Uni2 Autonomous System
 8866      460        133          26   Bulgarian Telecommunication C
 3320      431       8152         375   Deutsche Telekom AG
29049      424         31          55   AzerSat LLC.
 8402      406        352          13   Corbina telecom
 8551      404        354          44   Bezeq International

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     1661        305         161   TVCABLE BOGOTA 
 8151     1409       2802         354   UniNet S.A. de C.V. 
28573     1302       1003          71   NET Servicos de Comunicao S.A
 7303     1051        578         166   Telecom Argentina Stet-France
14420      715         57          88   CORPORACION NACIONAL DE TELEC
 6503      582        450          68   AVANTEL, S.A. 
22047      579        322          17   VTR PUNTO NET S.A. 
27947      565         55          82   Telconet S.A
 3816      535        232          98   Empresa Nacional de Telecomun
 7738      515        986          31   Telecomunicacoes da Bahia 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
24863      812        147          43   LINKdotNET AS number
 8452      596        440          15   TEDATA
15475      512         74           8   Nile Online
36992      300        415          14   Etisalat MISR
 3741      267        938         228   The Internet Solution 
 6713      242        519          14   Itissalat Al-MAGHRIB
15706      219         32           6   Sudatel Internet Exchange Aut
33776      204         13          14   Starcomms Nigeria Limited
12258      193         28          62   Vodacom Internet Company 
29571      191         17          11   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     3564       3817         226   bellsouth.net, inc. 
23456     3204        762        1739   32-bit ASN transition
 4766     2508      11047         955   Korea Telecom (KIX)
17974     1985        516          31   PT TELEKOMUNIKASI INDONESIA
18566     1912        364         237   Covad Communications 
 1785     1822        680         122   PaeTec Communications, Inc.
10620     1661        305         161   TVCABLE BOGOTA 
 4323     1626       1085         395   Time Warner Telecom
20115     1591       1540         634   Charter Communications 
 7545     1581        301          83   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
17974      1985        1954      PT TELEKOMUNIKASI INDONESIA
 1785      1822        1700      PaeTec Communications, Inc.
18566      1912        1675      Covad Communications 
 4766      2508        1553      Korea Telecom (KIX)
10620      1661        1500      TVCABLE BOGOTA 
 7545      1581        1498      TPG Internet Pty Ltd
23456      3204        1465      32-bit ASN transition
 4755      1550        1380      TATA Communications formerly 
22773      1450        1351      Cox Communications, Inc.
 7029      1483        1252      Windstream 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
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
26973   UNALLOCATED  12.39.152.0/24        7018       AT&T WorldNet Servic
26973   UNALLOCATED  12.39.154.0/23        7018       AT&T WorldNet Servic
26973   UNALLOCATED  12.39.155.0/24        7018       AT&T WorldNet Servic
26973   UNALLOCATED  12.39.159.0/24        7018       AT&T WorldNet Servic
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

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

Advertised Unallocated Addresses
--------------------------------

Network            Origin AS  Description
24.225.128.0/18      36377     Comcast Telecommunications, I
24.225.192.0/23      36377     Comcast Telecommunications, I
24.225.192.0/18      36377     Comcast Telecommunications, I
24.225.224.0/21      36377     Comcast Telecommunications, I
24.225.237.0/24      36377     Comcast Telecommunications, I
24.225.248.0/21      36377     Comcast Telecommunications, I
41.222.79.0/24       36938     >>UNKNOWN<<
41.223.92.0/22       36936     >>UNKNOWN<<
46.18.104.0/21       23456     32-bit ASN transition
62.61.220.0/24       24974     Tachyon Europe BV - Wireless 

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      /10:27      /11:81      /12:234     
/13:463     /14:798     /15:1411    /16:11956   /17:5953    /18:9998    
/19:19711   /20:26697   /21:26880   /22:35996   /23:34665   /24:192096  
/25:1106    /26:1287    /27:739     /28:163     /29:4       /30:0       
/31:0       /32:5       

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

  ASN   No of nets  Total ann.   Description
 6389     2201          3564      bellsouth.net, inc. 
18566     1868          1912      Covad Communications 
10620     1556          1661      TVCABLE BOGOTA 
23456     1549          3204      32-bit ASN transition
30036     1290          1327      Mediacom Communications Corp 
 7029     1211          1483      Windstream Communications Inc
11492     1110          1156      Cable One 
 7011     1058          1183      Citizens Utilities 
 1785     1052          1822      PaeTec Communications, Inc.
22773      940          1450      Cox Communications, Inc.

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

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

   1:365       2:50        4:15        5:1         6:3         8:349    
  12:1949     13:1        14:523      15:13       16:3        17:5      
  20:10       23:31       24:1669     27:919      31:516      32:64     
  33:3        34:2        36:4        38:737      40:107      41:2430   
  42:40       44:3        46:980      47:3        49:236      50:412    
  52:13       54:2        55:6        56:2        57:34       58:868    
  59:495      60:376      61:1172     62:1085     63:1940     64:4021   
  65:2306     66:3933     67:1933     68:1116     69:3168     70:783    
  71:377      72:1855     74:2432     75:325      76:339      77:870    
  78:667      79:455      80:1108     81:843      82:504      83:491    
  84:686      85:1091     86:412      87:862      88:345      89:1537   
  90:232      91:4073     92:524      93:1129     94:1339     95:799    
  96:424      97:272      98:913      99:37      101:202     103:266    
 106:71      107:43      108:76      109:1015    110:666     111:745    
 112:319     113:439     114:563     115:707     116:911     117:678    
 118:883     119:1199    120:334     121:687     122:1580    123:1006   
 124:1339    125:1353    128:248     129:181     130:166     131:581    
 132:119     133:21      134:215     135:52      136:212     137:134    
 138:293     139:109     140:493     141:289     142:389     143:415    
 144:488     145:61      146:466     147:228     148:635     149:250    
 150:153     151:189     152:444     153:179     154:6       155:393    
 156:201     157:354     158:143     159:456     160:320     161:207    
 162:335     163:174     164:513     165:370     166:536     167:432    
 168:746     169:146     170:844     171:84      172:1       173:1644   
 174:631     175:390     176:167     177:246     178:1007    180:1018   
 181:25      182:608     183:233     184:352     185:1       186:1412   
 187:672     188:940     189:869     190:5141    192:5913    193:5000   
 194:3524    195:3029    196:1231    197:147     198:3590    199:4108   
 200:5511    201:1635    202:8503    203:8514    204:4242    205:2339   
 206:2675    207:2819    208:4009    209:3441    210:2672    211:1465   
 212:2092    213:1762    214:772     215:76      216:4837    217:1598   
 218:549     219:345     220:1226    221:515     222:352     223:259    


End of report




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