Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Sep 2 14:10:00 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 03 Sep, 2011

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

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

BGP routing table entries examined:                              370062
    Prefixes after maximum aggregation:                          167213
    Deaggregation factor:                                          2.21
    Unique aggregates announced to Internet:                     183305
Total ASes present in the Internet Routing Table:                 38662
    Prefixes per ASN:                                              9.57
Origin-only ASes present in the Internet Routing Table:           32065
Origin ASes announcing only one prefix:                           15405
Transit ASes present in the Internet Routing Table:                5220
Transit-only ASes present in the Internet Routing Table:            139
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:              1179
    Unregistered ASNs in the Routing Table:                         675
Number of 32-bit ASNs allocated by the RIRs:                       1700
Number of 32-bit ASNs visible in the Routing Table:                1377
Prefixes from 32-bit ASNs in the Routing Table:                    3177
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            110
Number of addresses announced to Internet:                   2472185408
    Equivalent to 147 /8s, 90 /16s and 142 /24s
    Percentage of available address space announced:               66.7
    Percentage of allocated address space announced:               66.7
    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:      154267

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

Prefixes being announced by APNIC Region ASes:                    93241
    Total APNIC prefixes after maximum aggregation:               30588
    APNIC Deaggregation factor:                                    3.05
Prefixes being announced from the APNIC address blocks:           89767
    Unique aggregates announced from the APNIC address blocks:    38038
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:               1248
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:     79
Number of APNIC addresses announced to Internet:              625813024
    Equivalent to 37 /8s, 77 /16s and 38 /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:                    142899
    Total ARIN prefixes after maximum aggregation:                73449
    ARIN Deaggregation factor:                                     1.95
Prefixes being announced from the ARIN address blocks:           114823
    Unique aggregates announced from the ARIN address blocks:     47244
ARIN Region origin ASes present in the Internet Routing Table:    14626
    ARIN Prefixes per ASN:                                         7.85
ARIN Region origin ASes announcing only one prefix:                5626
ARIN Region transit ASes present in the Internet Routing Table:    1551
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:               804272128
    Equivalent to 47 /8s, 240 /16s and 56 /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:                     87977
    Total RIPE prefixes after maximum aggregation:                49929
    RIPE Deaggregation factor:                                     1.76
Prefixes being announced from the RIPE address blocks:            81096
    Unique aggregates announced from the RIPE address blocks:     53651
RIPE Region origin ASes present in the Internet Routing Table:    15930
    RIPE Prefixes per ASN:                                         5.09
RIPE Region origin ASes announcing only one prefix:                7931
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:     981
Number of RIPE addresses announced to Internet:               488374784
    Equivalent to 29 /8s, 28 /16s and 2 /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:                   34284
    Total LACNIC prefixes after maximum aggregation:               7721
    LACNIC Deaggregation factor:                                   4.44
Prefixes being announced from the LACNIC address blocks:          33570
    Unique aggregates announced from the LACNIC address blocks:   17498
LACNIC Region origin ASes present in the Internet Routing Table:   1514
    LACNIC Prefixes per ASN:                                      22.17
LACNIC Region origin ASes announcing only one prefix:               447
LACNIC Region transit ASes present in the Internet Routing Table:   279
Average LACNIC Region AS path length visible:                       4.5
    Max LACNIC Region AS path length visible:                        19
Number of LACNIC region 32-bit ASNs visible in the Routing Table:   301
Number of LACNIC addresses announced to Internet:              87749504
    Equivalent to 5 /8s, 58 /16s and 243 /24s
    Percentage of available LACNIC address space announced:        58.1

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:                   8317
    Total AfriNIC prefixes after maximum aggregation:              2022
    AfriNIC Deaggregation factor:                                  4.11
Prefixes being announced from the AfriNIC address blocks:          6417
    Unique aggregates announced from the AfriNIC address blocks:   2012
AfriNIC Region origin ASes present in the Internet Routing Table:   483
    AfriNIC Prefixes per ASN:                                     13.29
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:                      4.6
    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:             26801152
    Equivalent to 1 /8s, 152 /16s and 244 /24s
    Percentage of available AfriNIC address space announced:       39.9

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         954   Korea Telecom (KIX)
17974     1949        516          31   PT TELEKOMUNIKASI INDONESIA
 7545     1577        301          83   TPG Internet Pty Ltd
 4755     1538        635         169   TATA Communications formerly 
24560     1195        337         187   Bharti Airtel Ltd., Telemedia
 9829     1151        989          28   BSNL National Internet Backbo
 4808     1073       2092         305   CNCGROUP IP network: China169
 9583     1073         79         503   Sify Limited
17488     1031        192         150   Hathway IP Over Cable Interne
 7552      991       1062          11   Vietel Corporation

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         227   bellsouth.net, inc. 
18566     1913        365         238   Covad Communications 
 1785     1822        680         122   PaeTec Communications, Inc.
 4323     1624       1085         396   Time Warner Telecom
20115     1590       1540         633   Charter Communications 
 7029     1581        995         230   Windstream Communications Inc
22773     1452       2906          99   Cox Communications, Inc.
19262     1393       4716         399   Verizon Global Networks 
 7018     1341       7051         877   AT&T WorldNet Services
 2386     1222        515         880   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         182   BILISIM TELEKOM
 6830      523       1811         321   UPC Distribution Services
20940      490        148         383   Akamai Technologies European 
 3292      470       2079         404   TDC Tele Danmark
12479      466        593           7   Uni2 Autonomous System
 8866      459        133          26   Bulgarian Telecommunication C
 3320      430       8152         374   Deutsche Telekom AG
29049      424         31          55   AzerSat LLC.
 8402      404        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     1628        298         154   TVCABLE BOGOTA 
 8151     1405       2775         351   UniNet S.A. de C.V. 
28573     1283       1003          71   NET Servicos de Comunicao S.A
 7303     1058        578         170   Telecom Argentina Stet-France
14420      715         57          88   CORPORACION NACIONAL DE TELEC
 6503      591        450          68   AVANTEL, S.A. 
22047      579        322          17   VTR PUNTO NET S.A. 
27947      561         55          82   Telconet S.A
 3816      531        232          96   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      809        147          43   LINKdotNET AS number
 8452      625        445          11   TEDATA
15475      512         74           8   Nile Online
36992      302        415          14   Etisalat MISR
 3741      266        937         227   The Internet Solution 
 6713      242        519          14   Itissalat Al-MAGHRIB
15706      219         32           6   Sudatel Internet Exchange Aut
33776      207         13          14   Starcomms Nigeria Limited
12258      194         28          61   Vodacom Internet Company 
24835      181         70          12   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     3564       3817         227   bellsouth.net, inc. 
23456     3177        752        1709   32-bit ASN transition
 4766     2508      11047         954   Korea Telecom (KIX)
17974     1949        516          31   PT TELEKOMUNIKASI INDONESIA
18566     1913        365         238   Covad Communications 
 1785     1822        680         122   PaeTec Communications, Inc.
10620     1628        298         154   TVCABLE BOGOTA 
 4323     1624       1085         396   Time Warner Telecom
20115     1590       1540         633   Charter Communications 
 7029     1581        995         230   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      1949        1918      PT TELEKOMUNIKASI INDONESIA
 1785      1822        1700      PaeTec Communications, Inc.
18566      1913        1675      Covad Communications 
 4766      2508        1554      Korea Telecom (KIX)
 7545      1577        1494      TPG Internet Pty Ltd
10620      1628        1474      TVCABLE BOGOTA 
23456      3177        1468      32-bit ASN transition
 4755      1538        1369      TATA Communications formerly 
22773      1452        1353      Cox Communications, Inc.
 7029      1581        1351      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
50.115.0.0/20        40431     Travail Systems, LLC 

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     
/13:461     /14:796     /15:1410    /16:11946   /17:5944    /18:9965    
/19:19636   /20:26661   /21:26765   /22:35839   /23:34555   /24:192384  
/25:1117    /26:1301    /27:736     /28:165     /29:4       /30:0       
/31:0       /32:5       

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

  ASN   No of nets  Total ann.   Description
 6389     2200          3564      bellsouth.net, inc. 
18566     1868          1913      Covad Communications 
23456     1553          3177      32-bit ASN transition
10620     1523          1628      TVCABLE BOGOTA 
 7029     1280          1581      Windstream Communications Inc
11492     1107          1153      Cable One 
 7011     1057          1182      Citizens Utilities 
 1785     1053          1822      PaeTec Communications, Inc.
22773      942          1452      Cox Communications, Inc.
30036      928           956      Mediacom Communications Corp 

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

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

   1:363       2:51        4:15        5:1         6:3         8:348    
  12:1950     13:1        14:529      15:13       16:3        17:5      
  20:10       23:31       24:1678     27:931      31:518      32:64     
  33:3        34:2        36:4        38:734      40:107      41:2413   
  42:40       44:3        46:1076     47:3        49:229      50:413    
  52:13       54:2        55:3        56:2        57:35       58:873    
  59:491      60:376      61:1172     62:1095     63:1940     64:4007   
  65:2307     66:3927     67:1931     68:1111     69:3129     70:781    
  71:375      72:1857     74:2422     75:328      76:339      77:862    
  78:705      79:452      80:1120     81:840      82:493      83:494    
  84:683      85:1083     86:497      87:860      88:338      89:1532   
  90:231      91:4054     92:524      93:1139     94:1382     95:879    
  96:416      97:271      98:924      99:37      101:203     103:250    
 106:79      107:41      108:75      109:1012    110:662     111:748    
 112:309     113:429     114:565     115:704     116:997     117:681    
 118:884     119:1197    120:334     121:686     122:1618    123:1003   
 124:1343    125:1355    128:248     129:178     130:166     131:579    
 132:119     133:21      134:214     135:53      136:213     137:136    
 138:294     139:116     140:492     141:286     142:389     143:418    
 144:487     145:61      146:464     147:222     148:631     149:250    
 150:152     151:190     152:441     153:179     154:6       155:398    
 156:201     157:354     158:141     159:450     160:319     161:207    
 162:335     163:167     164:512     165:366     166:537     167:433    
 168:748     169:146     170:847     171:84      172:1       173:1646   
 174:615     175:399     176:156     177:244     178:1019    180:1013   
 181:25      182:609     183:243     184:351     185:1       186:1408   
 187:687     188:938     189:878     190:5153    192:5927    193:5001   
 194:3518    195:3050    196:1237    197:144     198:3585    199:4086   
 200:5440    201:1567    202:8525    203:8502    204:4241    205:2329   
 206:2675    207:2832    208:4034    209:3433    210:2712    211:1466   
 212:2084    213:1764    214:776     215:76      216:4854    217:1624   
 218:550     219:344     220:1195    221:515     222:353     223:261    


End of report




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