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Weekly Routing Table Report



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 <pfs at cisco.com>.

Routing Table Report   04:00 +10GMT Sat 26 Feb, 2011

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

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

BGP routing table entries examined:                              348212
    Prefixes after maximum aggregation:                          157161
    Deaggregation factor:                                          2.22
    Unique aggregates announced to Internet:                     171859
Total ASes present in the Internet Routing Table:                 35939
    Prefixes per ASN:                                              9.69
Origin-only ASes present in the Internet Routing Table:           30974
Origin ASes announcing only one prefix:                           14951
Transit ASes present in the Internet Routing Table:                4965
Transit-only ASes present in the Internet Routing Table:            120
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      31
    Max AS path prepend of ASN (36992)                               29
Prefixes from unregistered ASNs in the Routing Table:               340
    Unregistered ASNs in the Routing Table:                         141
Number of 32-bit ASNs allocated by the RIRs:                       1141
Prefixes from 32-bit ASNs in the Routing Table:                       2
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            202
Number of addresses announced to Internet:                   2366402016
    Equivalent to 141 /8s, 12 /16s and 109 /24s
    Percentage of available address space announced:               63.8
    Percentage of allocated address space announced:               63.8
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               88.1
Total number of prefixes smaller than registry allocations:      144236

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

Prefixes being announced by APNIC Region ASes:                    86615
    Total APNIC prefixes after maximum aggregation:               29555
    APNIC Deaggregation factor:                                    2.93
Prefixes being announced from the APNIC address blocks:           83423
    Unique aggregates announced from the APNIC address blocks:    35959
APNIC Region origin ASes present in the Internet Routing Table:    4335
    APNIC Prefixes per ASN:                                       19.24
APNIC Region origin ASes announcing only one prefix:               1203
APNIC Region transit ASes present in the Internet Routing Table:    691
Average APNIC Region AS path length visible:                        4.4
    Max APNIC Region AS path length visible:                         18
Number of APNIC addresses announced to Internet:              592208160
    Equivalent to 35 /8s, 76 /16s and 97 /24s
    Percentage of available APNIC address space announced:         75.1

APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079
                       55296-56319, 131072-132095
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:                    139724
    Total ARIN prefixes after maximum aggregation:                71567
    ARIN Deaggregation factor:                                     1.95
Prefixes being announced from the ARIN address blocks:           110380
    Unique aggregates announced from the ARIN address blocks:     45012
ARIN Region origin ASes present in the Internet Routing Table:    14211
    ARIN Prefixes per ASN:                                         7.77
ARIN Region origin ASes announcing only one prefix:                5395
ARIN Region transit ASes present in the Internet Routing Table:    1471
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          23
Number of ARIN addresses announced to Internet:               787499648
    Equivalent to 46 /8s, 240 /16s and 74 /24s
    Percentage of available ARIN address space announced:          62.6

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:                     82337
    Total RIPE prefixes after maximum aggregation:                46749
    RIPE Deaggregation factor:                                     1.76
Prefixes being announced from the RIPE address blocks:            75631
    Unique aggregates announced from the RIPE address blocks:     49313
RIPE Region origin ASes present in the Internet Routing Table:    15346
    RIPE Prefixes per ASN:                                         4.93
RIPE Region origin ASes announcing only one prefix:                7786
RIPE Region transit ASes present in the Internet Routing Table:    2386
Average RIPE Region AS path length visible:                         4.6
    Max RIPE Region AS path length visible:                          30
Number of RIPE addresses announced to Internet:               461025600
    Equivalent to 27 /8s, 122 /16s and 177 /24s
    Percentage of available RIPE address space announced:          74.3

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:                   31872
    Total LACNIC prefixes after maximum aggregation:               7374
    LACNIC Deaggregation factor:                                   4.32
Prefixes being announced from the LACNIC address blocks:          30668
    Unique aggregates announced from the LACNIC address blocks:   15906
LACNIC Region origin ASes present in the Internet Routing Table:   1435
    LACNIC Prefixes per ASN:                                      21.37
LACNIC Region origin ASes announcing only one prefix:               434
LACNIC Region transit ASes present in the Internet Routing Table:   264
Average LACNIC Region AS path length visible:                       4.4
    Max LACNIC Region AS path length visible:                        18
Number of LACNIC addresses announced to Internet:              80968832
    Equivalent to 4 /8s, 211 /16s and 124 /24s
    Percentage of available LACNIC address space announced:        53.6

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:                   7451
    Total AfriNIC prefixes after maximum aggregation:              1805
    AfriNIC Deaggregation factor:                                  4.13
Prefixes being announced from the AfriNIC address blocks:          5870
    Unique aggregates announced from the AfriNIC address blocks:   1836
AfriNIC Region origin ASes present in the Internet Routing Table:   434
    AfriNIC Prefixes per ASN:                                     13.53
AfriNIC Region origin ASes announcing only one prefix:              133
AfriNIC Region transit ASes present in the Internet Routing Table:   92
Average AfriNIC Region AS path length visible:                      5.4
    Max AfriNIC Region AS path length visible:                       31
Number of AfriNIC addresses announced to Internet:             21888000
    Equivalent to 1 /8s, 77 /16s and 252 /24s
    Percentage of available AfriNIC address space announced:       32.6

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     2421       9501         886   Korea Telecom (KIX)
 7545     1614        302          85   TPG Internet Pty Ltd
 4755     1418        634         164   TATA Communications formerly 
17974     1415        475          29   PT TELEKOMUNIKASI INDONESIA
24560     1115        323         184   Bharti Airtel Ltd., Telemedia
 4808     1046       2142         294   CNCGROUP IP network: China169
 9583     1045         77         488   Sify Limited
17488      940        161         102   Hathway IP Over Cable Interne
18101      931        117         139   Reliance Infocom Ltd Internet
 9829      895        761          45   BSNL National Internet Backbo

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     3690       3855         261   bellsouth.net, inc. 
 4323     2604       1109         404   Time Warner Telecom
19262     1787       4954         285   Verizon Global Networks 
 1785     1786        697         131   PaeTec Communications, Inc.
20115     1528       1535         647   Charter Communications 
 6478     1522        296          84   AT&T Worldnet Services 
18566     1447        321         156   Covad Communications 
 7018     1357       6689         874   AT&T WorldNet Services
 2386     1297        553         933   AT&T Data Communications Serv
11492     1286        236          70   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
 6830      514       1780         319   UPC Distribution Services
 9198      470        267          15   Kazakhtelecom Data Network Ad
34984      465         98         145   BILISIM TELEKOM
 3292      447       1996         388   TDC Tele Danmark
 8866      442        133          23   Bulgarian Telecommunication C
20940      412         98         316   Akamai Technologies European 
 3320      410       7620         357   Deutsche Telekom AG
 8551      403        353          46   Bezeq International
  702      396       1800         310   UUNET - Commercial IP service
 3301      383       1822         341   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     1383        257         166   TVCABLE BOGOTA 
 8151     1353       2686         362   UniNet S.A. de C.V. 
28573     1234        961          82   NET Servicos de Comunicao S.A
 6503     1169        354          73   AVANTEL, S.A. 
 7303      907        464         145   Telecom Argentina Stet-France
14420      641         57          94   CORPORACION NACIONAL DE TELEC
22047      543        310          15   VTR PUNTO NET S.A. 
 3816      508        221         101   Empresa Nacional de Telecomun
 7738      478        922          30   Telecomunicacoes da Bahia S.A
11172      462         83          82   Servicios Alestra S.A de C.V 

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      770        445          11   TEDATA
24863      692        147          39   LINKdotNET AS number
15475      473         90          12   Nile Online
36992      299        271          14   Etisalat MISR
 3741      264        987         226   The Internet Solution 
33776      230         13           5   Starcomms Nigeria Limited
24835      218         78          10   RAYA Telecom - Egypt
 6713      205        199          12   Itissalat Al-MAGHRIB
29571      192         17          11   Ci Telecom Autonomous system 
16637      156        439          87   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
 6389     3690       3855         261   bellsouth.net, inc. 
 4323     2604       1109         404   Time Warner Telecom
 4766     2421       9501         886   Korea Telecom (KIX)
19262     1787       4954         285   Verizon Global Networks 
 1785     1786        697         131   PaeTec Communications, Inc.
 7545     1614        302          85   TPG Internet Pty Ltd
20115     1528       1535         647   Charter Communications 
 6478     1522        296          84   AT&T Worldnet Services 
18566     1447        321         156   Covad Communications 
 4755     1418        634         164   TATA Communications formerly 

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

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

  ASN   No of nets  Net Savings Description
 4323      2604        2200      Time Warner Telecom
 1785      1786        1655      PaeTec Communications, Inc.
 4766      2421        1535      Korea Telecom (KIX)
 7545      1614        1529      TPG Internet Pty Ltd
19262      1787        1502      Verizon Global Networks 
 6478      1522        1438      AT&T Worldnet Services 
17974      1415        1386      PT TELEKOMUNIKASI INDONESIA
18566      1447        1291      Covad Communications 
 4755      1418        1254      TATA Communications formerly 
10620      1383        1217      TVCABLE BOGOTA 

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

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS  Designation  Network              Transit AS  Description
16927   UNALLOCATED  12.0.252.0/23         7018       AT&T WorldNet Servic
15132   UNALLOCATED  12.9.150.0/24         7018       AT&T WorldNet Servic
32567   UNALLOCATED  12.14.170.0/24        4323       Time Warner Telecom
13746   UNALLOCATED  12.24.56.0/24         7018       AT&T WorldNet Servic
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

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

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

Network            Origin AS  Description
5.0.0.0/16           12654     RIPE NCC RIS Project
5.1.0.0/21           12654     RIPE NCC RIS Project
5.1.24.0/24          12654     RIPE NCC RIS Project
24.129.192.0/19       7922     Continental Cablevision 
31.43.64.0/19        30886     ISP LvivLan autonomous system
37.0.0.0/16          12654     RIPE NCC RIS Project
37.1.0.0/21          12654     RIPE NCC RIS Project
37.1.24.0/24         12654     RIPE NCC RIS Project
41.57.192.0/18       22750     BCSNET
41.222.79.0/24       36938     >>UNKNOWN<<

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       /9:10      /10:26      /11:72      /12:215     
/13:444     /14:765     /15:1372    /16:11536   /17:5667    /18:9352    
/19:18904   /20:24452   /21:24996   /22:33336   /23:31719   /24:181897  
/25:1150    /26:1378    /27:706     /28:169     /29:16      /30:3       
/31:0       /32:8       

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

  ASN   No of nets  Total ann.   Description
 6389     2277          3690      bellsouth.net, inc. 
 6478     1476          1522      AT&T Worldnet Services 
18566     1425          1447      Covad Communications 
 4323     1403          2604      Time Warner Telecom
10620     1274          1383      TVCABLE BOGOTA 
11492     1243          1286      Cable One 
 7011     1056          1158      Citizens Utilities 
 1785     1054          1786      PaeTec Communications, Inc.
 6503      952          1169      AVANTEL, S.A. 
19262      899          1787      Verizon Global Networks 

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

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

   1:251       2:40        4:13        5:1         8:333      12:2029   
  13:1        14:412      15:15       16:3        17:8        20:9      
  23:1        24:1493     27:596      32:60       33:4        34:2      
  37:1        38:706      40:101      41:2307     44:3        46:641    
  47:4        49:153      50:95       52:12       55:2        56:2      
  57:31       58:865      59:475      60:383      61:1108     62:1042   
  63:1940     64:3848     65:2360     66:4254     67:1778     68:1030   
  69:2892     70:730      71:399      72:2012     73:1        74:2350   
  75:292      76:346      77:854      78:697      79:445      80:1064   
  81:812      82:522      83:464      84:636      85:1046     86:576    
  87:738      88:355      89:1578     90:157      91:3542     92:494    
  93:1047     94:1207     95:771      96:455      97:251      98:790    
  99:33      101:35      107:3       108:88      109:930     110:484    
 111:718     112:315     113:369     114:499     115:651     116:946    
 117:685     118:685     119:1020    120:244     121:696     122:1624   
 123:1056    124:1291    125:1258    128:266     129:156     130:173    
 131:568     132:108     133:20      134:220     135:49      136:215    
 137:146     138:294     139:117     140:490     141:203     142:355    
 143:386     144:484     145:51      146:441     147:199     148:636    
 149:273     150:169     151:229     152:298     153:179     154:3      
 155:377     156:176     157:344     158:128     159:381     160:315    
 161:208     162:276     163:156     164:486     165:339     166:502    
 167:411     168:737     169:150     170:755     171:69      172:2      
 173:1224    174:505     175:320     176:1       177:23      178:771    
 180:816     181:2       182:363     183:247     184:213     186:1020   
 187:828     188:896     189:1055    190:4423    192:5806    193:4798   
 194:3503    195:2964    196:1194    197:3       198:3586    199:3833   
 200:5603    201:1577    202:8292    203:8444    204:4085    205:2300   
 206:2644    207:3073    208:3922    209:3485    210:2646    211:1347   
 212:1932    213:1739    214:768     215:63      216:4856    217:1639   
 218:547     219:365     220:1201    221:452     222:314     223:104    


End of report