Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Feb 18 12:27:23 CST 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 <pfs at cisco.com>.

Routing Table Report   04:00 +10GMT Sat 19 Feb, 2011

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

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

BGP routing table entries examined:                              347279
    Prefixes after maximum aggregation:                          156690
    Deaggregation factor:                                          2.22
    Unique aggregates announced to Internet:                     171504
Total ASes present in the Internet Routing Table:                 35911
    Prefixes per ASN:                                              9.67
Origin-only ASes present in the Internet Routing Table:           30942
Origin ASes announcing only one prefix:                           14976
Transit ASes present in the Internet Routing Table:                4969
Transit-only ASes present in the Internet Routing Table:            122
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:               333
    Unregistered ASNs in the Routing Table:                         135
Number of 32-bit ASNs allocated by the RIRs:                       1131
Prefixes from 32-bit ASNs in the Routing Table:                       1
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            206
Number of addresses announced to Internet:                   2396213440
    Equivalent to 142 /8s, 211 /16s and 80 /24s
    Percentage of available address space announced:               64.6
    Percentage of allocated address space announced:               64.6
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               88.0
Total number of prefixes smaller than registry allocations:      143943

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

Prefixes being announced by APNIC Region ASes:                    85964
    Total APNIC prefixes after maximum aggregation:               29310
    APNIC Deaggregation factor:                                    2.93
Prefixes being announced from the APNIC address blocks:           82763
    Unique aggregates announced from the APNIC address blocks:    35864
APNIC Region origin ASes present in the Internet Routing Table:    4330
    APNIC Prefixes per ASN:                                       19.11
APNIC Region origin ASes announcing only one prefix:               1205
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:              589615904
    Equivalent to 35 /8s, 36 /16s and 211 /24s
    Percentage of available APNIC address space announced:         74.8

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:                    139812
    Total ARIN prefixes after maximum aggregation:                71478
    ARIN Deaggregation factor:                                     1.96
Prefixes being announced from the ARIN address blocks:           110606
    Unique aggregates announced from the ARIN address blocks:     44958
ARIN Region origin ASes present in the Internet Routing Table:    14208
    ARIN Prefixes per ASN:                                         7.78
ARIN Region origin ASes announcing only one prefix:                5412
ARIN Region transit ASes present in the Internet Routing Table:    1470
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          27
Number of ARIN addresses announced to Internet:               787367552
    Equivalent to 46 /8s, 238 /16s and 70 /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:                     82060
    Total RIPE prefixes after maximum aggregation:                46598
    RIPE Deaggregation factor:                                     1.76
Prefixes being announced from the RIPE address blocks:            75405
    Unique aggregates announced from the RIPE address blocks:     49074
RIPE Region origin ASes present in the Internet Routing Table:    15325
    RIPE Prefixes per ASN:                                         4.92
RIPE Region origin ASes announcing only one prefix:                7790
RIPE Region transit ASes present in the Internet Routing Table:    2392
Average RIPE Region AS path length visible:                         4.6
    Max RIPE Region AS path length visible:                          30
Number of RIPE addresses announced to Internet:               460222144
    Equivalent to 27 /8s, 110 /16s and 110 /24s
    Percentage of available RIPE address space announced:          74.1

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:                   31784
    Total LACNIC prefixes after maximum aggregation:               7387
    LACNIC Deaggregation factor:                                   4.30
Prefixes being announced from the LACNIC address blocks:          30548
    Unique aggregates announced from the LACNIC address blocks:   15959
LACNIC Region origin ASes present in the Internet Routing Table:   1429
    LACNIC Prefixes per ASN:                                      21.38
LACNIC Region origin ASes announcing only one prefix:               436
LACNIC Region transit ASes present in the Internet Routing Table:   261
Average LACNIC Region AS path length visible:                       4.4
    Max LACNIC Region AS path length visible:                        19
Number of LACNIC addresses announced to Internet:              80804992
    Equivalent to 4 /8s, 208 /16s and 252 /24s
    Percentage of available LACNIC address space announced:        53.5

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:                   7445
    Total AfriNIC prefixes after maximum aggregation:              1807
    AfriNIC Deaggregation factor:                                  4.12
Prefixes being announced from the AfriNIC address blocks:          5842
    Unique aggregates announced from the AfriNIC address blocks:   1841
AfriNIC Region origin ASes present in the Internet Routing Table:   437
    AfriNIC Prefixes per ASN:                                     13.37
AfriNIC Region origin ASes announcing only one prefix:              132
AfriNIC Region transit ASes present in the Internet Routing Table:   95
Average AfriNIC Region AS path length visible:                      5.4
    Max AfriNIC Region AS path length visible:                       31
Number of AfriNIC addresses announced to Internet:             21857280
    Equivalent to 1 /8s, 77 /16s and 132 /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     2307       9497         819   Korea Telecom (KIX)
 7545     1628        302          87   TPG Internet Pty Ltd
 4755     1417        634         163   TATA Communications formerly 
17974     1409        475          29   PT TELEKOMUNIKASI INDONESIA
24560     1113        323         182   Bharti Airtel Ltd., Telemedia
 9583     1044         77         488   Sify Limited
 4808     1042       2142         294   CNCGROUP IP network: China169
17488      950        162         103   Hathway IP Over Cable Interne
18101      929        117         141   Reliance Infocom Ltd Internet
 9829      898        763          42   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     3694       3855         261   bellsouth.net, inc. 
 4323     2623       1109         405   Time Warner Telecom
19262     1843       4955         283   Verizon Global Networks 
 1785     1784        697         131   PaeTec Communications, Inc.
20115     1527       1534         646   Charter Communications 
 6478     1510        295          78   AT&T Worldnet Services 
18566     1433        320         158   Covad Communications 
 7018     1358       6674         878   AT&T WorldNet Services
 2386     1297        553         934   AT&T Data Communications Serv
11492     1280        236          73   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      513       1764         318   UPC Distribution Services
 9198      468        267          15   Kazakhtelecom Data Network Ad
34984      463         98         143   BILISIM TELEKOM
 3292      447       1996         388   TDC Tele Danmark
 8866      440        133          23   Bulgarian Telecommunication C
20940      412         99         318   Akamai Technologies European 
 3320      410       7620         357   Deutsche Telekom AG
 8551      403        353          46   Bezeq International
  702      396       1800         309   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     1374        255         166   TVCABLE BOGOTA 
 8151     1342       2664         359   UniNet S.A. de C.V. 
28573     1232        961          82   NET Servicos de Comunicao S.A
 6503     1187        354          73   AVANTEL, S.A. 
 7303      898        463         142   Telecom Argentina Stet-France
14420      638         57          92   CORPORACION NACIONAL DE TELEC
22047      545        310          15   VTR PUNTO NET S.A. 
 3816      508        221          97   Empresa Nacional de Telecomun
 7738      478        922          30   Telecomunicacoes da Bahia S.A
14117      461         34          33   Telefonica del Sur 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      763        147          39   LINKdotNET AS number
 8452      730        445          11   TEDATA
15475      496         90          12   Nile Online
36992      301        271          14   Etisalat MISR
 3741      264        987         226   The Internet Solution 
24835      219         78          10   RAYA Telecom - Egypt
 6713      205        199          12   Itissalat Al-MAGHRIB
33776      194         12          15   Starcomms Nigeria Limited
29571      192         17          11   Ci Telecom Autonomous system 
16637      149        422          85   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     3694       3855         261   bellsouth.net, inc. 
 4323     2623       1109         405   Time Warner Telecom
 4766     2307       9497         819   Korea Telecom (KIX)
19262     1843       4955         283   Verizon Global Networks 
 1785     1784        697         131   PaeTec Communications, Inc.
 7545     1628        302          87   TPG Internet Pty Ltd
20115     1527       1534         646   Charter Communications 
 6478     1510        295          78   AT&T Worldnet Services 
18566     1433        320         158   Covad Communications 
 4755     1417        634         163   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      2623        2218      Time Warner Telecom
 1785      1784        1653      PaeTec Communications, Inc.
19262      1843        1560      Verizon Global Networks 
 7545      1628        1541      TPG Internet Pty Ltd
 4766      2307        1488      Korea Telecom (KIX)
 6478      1510        1432      AT&T Worldnet Services 
17974      1409        1380      PT TELEKOMUNIKASI INDONESIA
18566      1433        1275      Covad Communications 
 4755      1417        1254      TATA Communications formerly 
10620      1374        1208      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 
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
39.0.0.0/8             237     Merit Network 
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        /8:21       /9:10      /10:26      /11:72      /12:215     
/13:445     /14:764     /15:1368    /16:11511   /17:5649    /18:9326    
/19:18851   /20:24423   /21:24899   /22:33017   /23:31756   /24:181723  
/25:1076    /26:1274    /27:657     /28:169     /29:16      /30:3       
/31:0       /32:8       

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

  ASN   No of nets  Total ann.   Description
 6389     2281          3694      bellsouth.net, inc. 
 6478     1464          1510      AT&T Worldnet Services 
 4323     1413          2623      Time Warner Telecom
18566     1411          1433      Covad Communications 
10620     1265          1374      TVCABLE BOGOTA 
11492     1237          1280      Cable One 
 1785     1054          1784      PaeTec Communications, Inc.
 7011     1054          1157      Citizens Utilities 
 6503      969          1187      AVANTEL, S.A. 
19262      954          1843      Verizon Global Networks 

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

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

   1:196       2:42        4:13        5:1         8:334      12:2029   
  13:1        14:409      15:15       16:3        17:8        20:9      
  23:1        24:1489     27:587      32:60       33:4        34:2      
  37:1        38:706      40:101      41:2241     44:3        46:617    
  47:4        49:149      50:93       52:12       55:2        56:2      
  57:32       58:862      59:475      60:391      61:1107     62:1053   
  63:1940     64:3828     65:2349     66:4224     67:1781     68:1028   
  69:2949     70:736      71:403      72:2020     73:1        74:2344   
  75:292      76:346      77:871      78:710      79:446      80:1053   
  81:823      82:503      83:475      84:634      85:1043     86:559    
  87:750      88:355      89:1573     90:157      91:3516     92:493    
  93:1039     94:1208     95:768      96:453      97:251      98:824    
  99:33      101:31      107:3       108:88      109:929     110:480    
 111:706     112:314     113:369     114:500     115:656     116:928    
 117:687     118:675     119:1021    120:242     121:701     122:1627   
 123:1052    124:1286    125:1257    128:266     129:156     130:170    
 131:569     132:109     133:20      134:216     135:49      136:215    
 137:146     138:292     139:119     140:494     141:203     142:359    
 143:376     144:486     145:51      146:437     147:199     148:638    
 149:276     150:160     151:229     152:298     153:180     154:3      
 155:349     156:176     157:342     158:129     159:380     160:313    
 161:206     162:274     163:161     164:486     165:338     166:502    
 167:422     168:737     169:150     170:754     171:69      172:11     
 173:1318    174:530     175:317     176:1       177:9       178:783    
 180:810     182:361     183:247     184:210     186:1010    187:826    
 188:895     189:1067    190:4404    192:5802    193:4803    194:3509   
 195:2955    196:1191    197:3       198:3573    199:3834    200:5595   
 201:1581    202:8260    203:8442    204:4101    205:2341    206:2624   
 207:3086    208:3903    209:3496    210:2632    211:1340    212:1930   
 213:1737    214:739     215:62      216:4892    217:1621    218:540    
 219:379     220:1201    221:452     222:312     223:100    

End of report




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