Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Aug 19 14:08:03 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 20 Aug, 2011

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

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

BGP routing table entries examined:                              368024
    Prefixes after maximum aggregation:                          166632
    Deaggregation factor:                                          2.21
    Unique aggregates announced to Internet:                     182554
Total ASes present in the Internet Routing Table:                 38538
    Prefixes per ASN:                                              9.55
Origin-only ASes present in the Internet Routing Table:           31989
Origin ASes announcing only one prefix:                           15372
Transit ASes present in the Internet Routing Table:                5224
Transit-only ASes present in the Internet Routing Table:            144
Average AS path length visible in the Internet Routing Table:       4.4
    Max AS path length visible:                                      34
    Max AS path prepend of ASN (22394)                               31
Prefixes from unregistered ASNs in the Routing Table:              1107
    Unregistered ASNs in the Routing Table:                         630
Number of 32-bit ASNs allocated by the RIRs:                       1659
Number of 32-bit ASNs visible in the Routing Table:                1325
Prefixes from 32-bit ASNs in the Routing Table:                    3080
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            112
Number of addresses announced to Internet:                   2469201344
    Equivalent to 147 /8s, 45 /16s and 5 /24s
    Percentage of available address space announced:               66.6
    Percentage of allocated address space announced:               66.6
    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:      153512

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

Prefixes being announced by APNIC Region ASes:                    92411
    Total APNIC prefixes after maximum aggregation:               30460
    APNIC Deaggregation factor:                                    3.03
Prefixes being announced from the APNIC address blocks:           88936
    Unique aggregates announced from the APNIC address blocks:    37698
APNIC Region origin ASes present in the Internet Routing Table:    4537
    APNIC Prefixes per ASN:                                       19.60
APNIC Region origin ASes announcing only one prefix:               1245
APNIC Region transit ASes present in the Internet Routing Table:    716
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:     73
Number of APNIC addresses announced to Internet:              624234272
    Equivalent to 37 /8s, 53 /16s and 15 /24s
    Percentage of available APNIC address space announced:         79.2

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:                    142440
    Total ARIN prefixes after maximum aggregation:                73359
    ARIN Deaggregation factor:                                     1.94
Prefixes being announced from the ARIN address blocks:           114314
    Unique aggregates announced from the ARIN address blocks:     47154
ARIN Region origin ASes present in the Internet Routing Table:    14593
    ARIN Prefixes per ASN:                                         7.83
ARIN Region origin ASes announcing only one prefix:                5613
ARIN Region transit ASes present in the Internet Routing Table:    1545
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          34
Number of ARIN region 32-bit ASNs visible in the Routing Table:      12
Number of ARIN addresses announced to Internet:               803789568
    Equivalent to 47 /8s, 232 /16s and 219 /24s
    Percentage of available ARIN address space announced:          63.9

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:                     87511
    Total RIPE prefixes after maximum aggregation:                49738
    RIPE Deaggregation factor:                                     1.76
Prefixes being announced from the RIPE address blocks:            80704
    Unique aggregates announced from the RIPE address blocks:     53464
RIPE Region origin ASes present in the Internet Routing Table:    15904
    RIPE Prefixes per ASN:                                         5.07
RIPE Region origin ASes announcing only one prefix:                7918
RIPE Region transit ASes present in the Internet Routing Table:    2507
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:     949
Number of RIPE addresses announced to Internet:               487724544
    Equivalent to 29 /8s, 18 /16s and 22 /24s
    Percentage of available RIPE address space announced:          78.6

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:                   34083
    Total LACNIC prefixes after maximum aggregation:               7645
    LACNIC Deaggregation factor:                                   4.46
Prefixes being announced from the LACNIC address blocks:          33332
    Unique aggregates announced from the LACNIC address blocks:   17319
LACNIC Region origin ASes present in the Internet Routing Table:   1503
    LACNIC Prefixes per ASN:                                      22.18
LACNIC Region origin ASes announcing only one prefix:               444
LACNIC Region transit ASes present in the Internet Routing Table:   276
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:   287
Number of LACNIC addresses announced to Internet:              87644928
    Equivalent to 5 /8s, 57 /16s and 91 /24s
    Percentage of available LACNIC address space announced:        58.0

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:                   8326
    Total AfriNIC prefixes after maximum aggregation:              2041
    AfriNIC Deaggregation factor:                                  4.08
Prefixes being announced from the AfriNIC address blocks:          6423
    Unique aggregates announced from the AfriNIC address blocks:   2088
AfriNIC Region origin ASes present in the Internet Routing Table:   483
    AfriNIC Prefixes per ASN:                                     13.30
AfriNIC Region origin ASes announcing only one prefix:              152
AfriNIC Region transit ASes present in the Internet Routing Table:  106
Average AfriNIC Region AS path length visible:                      5.7
    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:             26893056
    Equivalent to 1 /8s, 154 /16s and 91 /24s
    Percentage of available AfriNIC address space announced:       40.1

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     2498      11046         950   Korea Telecom (KIX)
17974     1821        516          31   PT TELEKOMUNIKASI INDONESIA
 7545     1576        301          83   TPG Internet Pty Ltd
 4755     1534        635         169   TATA Communications formerly 
 7552     1412       1064           7   Vietel Corporation
24560     1199        336         187   Bharti Airtel Ltd., Telemedia
 9829     1153        989          28   BSNL National Internet Backbo
 9583     1076         79         496   Sify Limited
 4808     1067       2098         306   CNCGROUP IP network: China169
17488     1002        188         139   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     3585       3817         227   bellsouth.net, inc. 
18566     1912        364         240   Covad Communications 
 1785     1819        680         123   PaeTec Communications, Inc.
 4323     1618       1086         401   Time Warner Telecom
20115     1586       1537         630   Charter Communications 
 7029     1576        991         229   Windstream Communications Inc
22773     1434       2903          97   Cox Communications, Inc.
19262     1406       4778         396   Verizon Global Networks 
 7018     1351       7050         882   AT&T WorldNet Services
 2386     1230        516         892   AT&T Data Communications Serv

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      541        107         183   BILISIM TELEKOM
 6830      512       1788         317   UPC Distribution Services
20940      475        135         368   Akamai Technologies European 
 3292      469       2080         404   TDC Tele Danmark
 8866      458        133          26   Bulgarian Telecommunication C
12479      456        593           7   Uni2 Autonomous System
 3320      425       8151         371   Deutsche Telekom AG
29049      424         31          55   AzerSat LLC.
 8551      404        354          44   Bezeq International
 3301      398       1855         347   TeliaNet Sweden

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     1591        294         163   TVCABLE BOGOTA 
 8151     1401       2770         354   UniNet S.A. de C.V. 
28573     1266        996          67   NET Servicos de Comunicao S.A
 7303     1064        578         176   Telecom Argentina Stet-France
 6503      743        450          75   AVANTEL, S.A. 
14420      705         56          85   CORPORACION NACIONAL DE TELEC
22047      578        322          17   VTR PUNTO NET S.A. 
 3816      532        232          96   Empresa Nacional de Telecomun
27947      518         53          54   Telconet S.A
 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      808        145          59   LINKdotNET AS number
 8452      639        445          11   TEDATA
15475      512         74           8   Nile Online
36992      302        415          14   Etisalat MISR
 3741      265        937         226   The Internet Solution 
 6713      244        519          14   Itissalat Al-MAGHRIB
33776      226         13           8   Starcomms Nigeria Limited
15706      219         32           6   Sudatel Internet Exchange Aut
12258      194         28          61   Vodacom Internet Company 
24835      179         78          10   RAYA Telecom - Egypt

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     3585       3817         227   bellsouth.net, inc. 
23456     3080        733        1651   32-bit ASN transition
 4766     2498      11046         950   Korea Telecom (KIX)
18566     1912        364         240   Covad Communications 
17974     1821        516          31   PT TELEKOMUNIKASI INDONESIA
 1785     1819        680         123   PaeTec Communications, Inc.
 4323     1618       1086         401   Time Warner Telecom
10620     1591        294         163   TVCABLE BOGOTA 
20115     1586       1537         630   Charter Communications 
 7029     1576        991         229   Windstream Communications Inc

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      1821        1790      PT TELEKOMUNIKASI INDONESIA
 1785      1819        1696      PaeTec Communications, Inc.
18566      1912        1672      Covad Communications 
 4766      2498        1548      Korea Telecom (KIX)
 7545      1576        1493      TPG Internet Pty Ltd
23456      3080        1429      32-bit ASN transition
10620      1591        1428      TVCABLE BOGOTA 
 7552      1412        1405      Vietel Corporation
 4755      1534        1365      TATA Communications formerly 
 7029      1576        1347      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<<
62.61.220.0/24       24974     Tachyon Europe BV - Wireless 
62.61.221.0/24       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      /12:233     
/13:460     /14:796     /15:1418    /16:11935   /17:5924    /18:9961    
/19:19532   /20:26588   /21:26596   /22:35566   /23:34251   /24:191318  
/25:1098    /26:1303    /27:739     /28:158     /29:4       /30:0       
/31:0       /32:5       

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

  ASN   No of nets  Total ann.   Description
 6389     2217          3585      bellsouth.net, inc. 
18566     1868          1912      Covad Communications 
23456     1507          3080      32-bit ASN transition
10620     1486          1591      TVCABLE BOGOTA 
 7029     1277          1576      Windstream Communications Inc
11492     1102          1148      Cable One 
 7011     1058          1161      Citizens Utilities 
 1785     1052          1819      PaeTec Communications, Inc.
22773      930          1434      Cox Communications, Inc.
30036      911           935      Mediacom Communications Corp 

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

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

   1:358       2:46        4:15        5:1         6:3         8:343    
  12:1954     13:1        14:505      15:15       16:3        17:5      
  20:10       23:27       24:1683     27:875      31:517      32:64     
  33:4        34:2        36:4        38:733      40:107      41:2458   
  42:45       44:3        46:1059     47:3        49:219      50:409    
  52:13       54:2        55:9        56:2        57:35       58:864    
  59:499      60:376      61:1179     62:1084     63:1928     64:3996   
  65:2300     66:3930     67:1916     68:1112     69:3085     70:779    
  71:372      72:1845     74:2437     75:329      76:339      77:861    
  78:710      79:479      80:1129     81:831      82:492      83:476    
  84:686      85:1078     86:499      87:839      88:335      89:1537   
  90:224      91:4037     92:526      93:1133     94:1339     95:872    
  96:419      97:267      98:924      99:37      101:78      103:212    
 106:69      107:32      108:74      109:1009    110:627     111:731    
 112:305     113:412     114:558     115:696     116:997     117:675    
 118:877     119:1225    120:314     121:689     122:1615    123:984    
 124:1317    125:1319    128:246     129:176     130:169     131:580    
 132:116     133:21      134:213     135:51      136:216     137:137    
 138:296     139:116     140:488     141:277     142:382     143:439    
 144:484     145:58      146:462     147:216     148:645     149:252    
 150:201     151:190     152:441     153:185     154:5       155:401    
 156:200     157:330     158:133     159:458     160:319     161:207    
 162:328     163:163     164:516     165:367     166:533     167:433    
 168:747     169:153     170:844     171:81      172:1       173:1652   
 174:613     175:393     176:153     177:229     178:957     180:936    
 181:26      182:528     183:242     184:364     185:1       186:1365   
 187:743     188:933     189:929     190:5131    192:5921    193:4984   
 194:3511    195:3038    196:1230    197:126     198:3591    199:4039   
 200:5517    201:1490    202:8410    203:8483    204:4248    205:2339   
 206:2672    207:2808    208:3998    209:3416    210:2706    211:1461   
 212:2085    213:1766    214:782     215:70      216:4865    217:1607   
 218:553     219:354     220:1220    221:515     222:354     223:241    


End of report




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