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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 <pfsinoz at gmail.com>.

Routing Table Report   04:00 +10GMT Sat 16 Jul, 2011

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

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

BGP routing table entries examined:                              363652
    Prefixes after maximum aggregation:                          165367
    Deaggregation factor:                                          2.20
    Unique aggregates announced to Internet:                     180640
Total ASes present in the Internet Routing Table:                 38198
    Prefixes per ASN:                                              9.52
Origin-only ASes present in the Internet Routing Table:           31741
Origin ASes announcing only one prefix:                           15260
Transit ASes present in the Internet Routing Table:                5195
Transit-only ASes present in the Internet Routing Table:            132
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      33
    Max AS path prepend of ASN (22394)                               27
Prefixes from unregistered ASNs in the Routing Table:               917
    Unregistered ASNs in the Routing Table:                         532
Number of 32-bit ASNs allocated by the RIRs:                       1559
Number of 32-bit ASNs visible in the Routing Table:                1262
Prefixes from 32-bit ASNs in the Routing Table:                    2910
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            122
Number of addresses announced to Internet:                   2477764128
    Equivalent to 147 /8s, 175 /16s and 174 /24s
    Percentage of available address space announced:               66.8
    Percentage of allocated address space announced:               66.9
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               91.1
Total number of prefixes smaller than registry allocations:      151592

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

Prefixes being announced by APNIC Region ASes:                    90715
    Total APNIC prefixes after maximum aggregation:               30300
    APNIC Deaggregation factor:                                    2.99
Prefixes being announced from the APNIC address blocks:           87321
    Unique aggregates announced from the APNIC address blocks:    37425
APNIC Region origin ASes present in the Internet Routing Table:    4519
    APNIC Prefixes per ASN:                                       19.32
APNIC Region origin ASes announcing only one prefix:               1253
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:     61
Number of APNIC addresses announced to Internet:              622188352
    Equivalent to 37 /8s, 21 /16s and 215 /24s
    Percentage of available APNIC address space announced:         78.9

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:                    141554
    Total ARIN prefixes after maximum aggregation:                73093
    ARIN Deaggregation factor:                                     1.94
Prefixes being announced from the ARIN address blocks:           113475
    Unique aggregates announced from the ARIN address blocks:     46690
ARIN Region origin ASes present in the Internet Routing Table:    14485
    ARIN Prefixes per ASN:                                         7.83
ARIN Region origin ASes announcing only one prefix:                5538
ARIN Region transit ASes present in the Internet Routing Table:    1526
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:      13
Number of ARIN addresses announced to Internet:               802399872
    Equivalent to 47 /8s, 211 /16s and 166 /24s
    Percentage of available ARIN address space announced:          63.8

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:                     86584
    Total RIPE prefixes after maximum aggregation:                49219
    RIPE Deaggregation factor:                                     1.76
Prefixes being announced from the RIPE address blocks:            79927
    Unique aggregates announced from the RIPE address blocks:     52892
RIPE Region origin ASes present in the Internet Routing Table:    15802
    RIPE Prefixes per ASN:                                         5.06
RIPE Region origin ASes announcing only one prefix:                7878
RIPE Region transit ASes present in the Internet Routing Table:    2504
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:     919
Number of RIPE addresses announced to Internet:               479486528
    Equivalent to 28 /8s, 148 /16s and 98 /24s
    Percentage of available RIPE address space announced:          77.2

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:                   33534
    Total LACNIC prefixes after maximum aggregation:               7585
    LACNIC Deaggregation factor:                                   4.42
Prefixes being announced from the LACNIC address blocks:          32747
    Unique aggregates announced from the LACNIC address blocks:   17050
LACNIC Region origin ASes present in the Internet Routing Table:   1481
    LACNIC Prefixes per ASN:                                      22.11
LACNIC Region origin ASes announcing only one prefix:               445
LACNIC Region transit ASes present in the Internet Routing Table:   273
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:   265
Number of LACNIC addresses announced to Internet:              86070528
    Equivalent to 5 /8s, 33 /16s and 85 /24s
    Percentage of available LACNIC address space announced:        57.0

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:                   8177
    Total AfriNIC prefixes after maximum aggregation:              1965
    AfriNIC Deaggregation factor:                                  4.16
Prefixes being announced from the AfriNIC address blocks:          6491
    Unique aggregates announced from the AfriNIC address blocks:   1992
AfriNIC Region origin ASes present in the Internet Routing Table:   468
    AfriNIC Prefixes per ASN:                                     13.87
AfriNIC Region origin ASes announcing only one prefix:              146
AfriNIC Region transit ASes present in the Internet Routing Table:  103
Average AfriNIC Region AS path length visible:                      4.7
    Max AfriNIC Region AS path length visible:                       24
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:    4
Number of AfriNIC addresses announced to Internet:             24338944
    Equivalent to 1 /8s, 115 /16s and 98 /24s
    Percentage of available AfriNIC address space announced:       36.3

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     2469      11044         937   Korea Telecom (KIX)
 7545     1554        301          85   TPG Internet Pty Ltd
17974     1543        456          45   PT TELEKOMUNIKASI INDONESIA
 4755     1505        635         170   TATA Communications formerly 
 7552     1283       1064           7   Vietel Corporation
24560     1155        336         187   Bharti Airtel Ltd., Telemedia
 9829     1106        923          47   BSNL National Internet Backbo
 9583     1064         78         504   Sify Limited
 4808     1047       2092         299   CNCGROUP IP network: China169
17488      966        187         106   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     3599       3818         241   bellsouth.net, inc. 
18566     1913        365         241   Covad Communications 
 1785     1805        681         121   PaeTec Communications, Inc.
 4323     1657       1082         400   Time Warner Telecom
20115     1594       1534         627   Charter Communications 
19262     1410       4744         390   Verizon Global Networks 
 7018     1365       7069         892   AT&T WorldNet Services
22773     1351       2897          88   Cox Communications, Inc.
 7029     1291        791         305   Windstream Communications Inc
 2386     1260        520         907   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      535        106         184   BILISIM TELEKOM
 6830      510       1780         315   UPC Distribution Services
 3292      468       2078         403   TDC Tele Danmark
12479      458        593           7   Uni2 Autonomous System
20940      458        131         354   Akamai Technologies European 
 8866      449        133          25   Bulgarian Telecommunication C
29049      432         32          47   AzerSat LLC.
 3320      423       8151         369   Deutsche Telekom AG
 8551      404        354          44   Bezeq International
  702      399       1803         312   UUNET - Commercial IP service

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     1549        284         162   TVCABLE BOGOTA 
 8151     1437       2746         353   UniNet S.A. de C.V. 
28573     1277        995          77   NET Servicos de Comunicao S.A
 7303      986        511         165   Telecom Argentina Stet-France
 6503      749        354          74   AVANTEL, S.A. 
14420      690         55          84   CORPORACION NACIONAL DE TELEC
22047      578        322          17   VTR PUNTO NET S.A. 
 3816      533        230          97   Empresa Nacional de Telecomun
 7738      516        986          31   Telecomunicacoes da Bahia S.A
27947      508         53          53   Telconet 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      795        147          36   LINKdotNET AS number
 8452      780        445          11   TEDATA
15475      513         74           8   Nile Online
36992      315        415          14   Etisalat MISR
 3741      261        937         223   The Internet Solution 
 6713      241        215          13   Itissalat Al-MAGHRIB
33776      227         13           5   Starcomms Nigeria Limited
24835      175         78          10   RAYA Telecom - Egypt
29571      158         17          11   Ci Telecom Autonomous system 
16637      148        441          86   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     3599       3818         241   bellsouth.net, inc. 
23456     2910        707        1559   32-bit ASN transition
 4766     2469      11044         937   Korea Telecom (KIX)
18566     1913        365         241   Covad Communications 
 1785     1805        681         121   PaeTec Communications, Inc.
 4323     1657       1082         400   Time Warner Telecom
20115     1594       1534         627   Charter Communications 
 7545     1554        301          85   TPG Internet Pty Ltd
10620     1549        284         162   TVCABLE BOGOTA 
17974     1543        456          45   PT TELEKOMUNIKASI INDONESIA

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

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

  ASN   No of nets  Net Savings Description
 1785      1805        1684      PaeTec Communications, Inc.
18566      1913        1672      Covad Communications 
 4766      2469        1532      Korea Telecom (KIX)
17974      1543        1498      PT TELEKOMUNIKASI INDONESIA
 7545      1554        1469      TPG Internet Pty Ltd
10620      1549        1387      TVCABLE BOGOTA 
23456      2910        1351      32-bit ASN transition
 4755      1505        1335      TATA Communications formerly 
 7552      1283        1276      Vietel Corporation
22773      1351        1263      Cox 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
41.223.92.0/22       36936     >>UNKNOWN<<
62.61.220.0/24       24974     Tachyon Europe BV - Wireless 
62.61.221.0/24       24974     Tachyon Europe BV - Wireless 
64.21.192.0/20       11610     Internet Nebraska Corporation

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        /8:20       /9:12      /10:26      /11:80      /12:232     
/13:464     /14:795     /15:1396    /16:12005   /17:5876    /18:9821    
/19:19496   /20:26056   /21:26209   /22:34865   /23:33683   /24:189377  
/25:1057    /26:1247    /27:720     /28:198     /29:9       /30:2       
/31:0       /32:6       

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

  ASN   No of nets  Total ann.   Description
 6389     2216          3599      bellsouth.net, inc. 
18566     1869          1913      Covad Communications 
10620     1444          1549      TVCABLE BOGOTA 
23456     1423          2910      32-bit ASN transition
11492     1097          1143      Cable One 
 7011     1056          1158      Citizens Utilities 
 6478     1055          1084      AT&T Worldnet Services 
 1785     1053          1805      PaeTec Communications, Inc.
 7029     1038          1291      Windstream Communications Inc
22773      865          1351      Cox Communications, Inc.

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

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

   1:328       2:44        4:16        5:1         6:3         8:338    
  12:1967     13:1        14:488      15:15       16:3        17:5      
  20:10       23:14       24:1679     27:824      31:502      32:64     
  33:4        34:2        36:4        38:745      40:104      41:2562   
  42:32       44:3        46:1037     47:3        49:201      50:471    
  52:13       54:2        55:4        56:2        57:35       58:863    
  59:479      60:386      61:1123     62:1033     63:1932     64:3954   
  65:2300     66:3889     67:1872     68:1103     69:3044     70:756    
  71:389      72:1888     74:2386     75:318      76:341      77:887    
  78:710      79:457      80:1116     81:840      82:499      83:454    
  84:691      85:1063     86:523      87:764      88:336      89:1534   
  90:224      91:3959     92:522      93:1050     94:1337     95:858    
  96:414      97:260      98:891      99:37      101:77      103:143    
 106:10      107:22      108:70      109:1022    110:607     111:712    
 112:305     113:406     114:552     115:686     116:978     117:689    
 118:832     119:1164    120:313     121:677     122:1608    123:979    
 124:1300    125:1277    128:245     129:171     130:169     131:575    
 132:111     133:21      134:213     135:48      136:216     137:137    
 138:297     139:116     140:482     141:244     142:403     143:416    
 144:483     145:55      146:452     147:211     148:680     149:248    
 150:160     151:189     152:342     153:182     154:4       155:397    
 156:198     157:323     158:138     159:454     160:311     161:202    
 162:309     163:164     164:499     165:366     166:529     167:433    
 168:734     169:153     170:847     171:78      172:1       173:1619   
 174:609     175:375     176:142     177:171     178:1005    180:898    
 181:23      182:492     183:231     184:344     185:1       186:1284   
 187:732     188:895     189:939     190:4979    192:5900    193:4975   
 194:3527    195:3029    196:1238    197:43      198:3581    199:3975   
 200:5561    201:1492    202:8416    203:8428    204:4235    205:2327   
 206:2668    207:2811    208:3969    209:3447    210:2693    211:1451   
 212:2100    213:1737    214:778     215:69      216:4936    217:1633   
 218:543     219:351     220:1231    221:496     222:337     223:218    


End of report