Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Mar 11 12:38:29 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 12 Mar, 2011

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

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

BGP routing table entries examined:                              350049
    Prefixes after maximum aggregation:                          157788
    Deaggregation factor:                                          2.22
    Unique aggregates announced to Internet:                     172931
Total ASes present in the Internet Routing Table:                 36036
    Prefixes per ASN:                                              9.71
Origin-only ASes present in the Internet Routing Table:           31061
Origin ASes announcing only one prefix:                           14941
Transit ASes present in the Internet Routing Table:                4975
Transit-only ASes present in the Internet Routing Table:            124
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:               392
    Unregistered ASNs in the Routing Table:                         178
Number of 32-bit ASNs allocated by the RIRs:                       1191
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:            252
Number of addresses announced to Internet:                   2467281824
    Equivalent to 147 /8s, 15 /16s and 187 /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:               89.1
Total number of prefixes smaller than registry allocations:      145075

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

Prefixes being announced by APNIC Region ASes:                    87220
    Total APNIC prefixes after maximum aggregation:               29669
    APNIC Deaggregation factor:                                    2.94
Prefixes being announced from the APNIC address blocks:           84042
    Unique aggregates announced from the APNIC address blocks:    36224
APNIC Region origin ASes present in the Internet Routing Table:    4339
    APNIC Prefixes per ASN:                                       19.37
APNIC Region origin ASes announcing only one prefix:               1194
APNIC Region transit ASes present in the Internet Routing Table:    690
Average APNIC Region AS path length visible:                        4.4
    Max APNIC Region AS path length visible:                         18
Number of APNIC addresses announced to Internet:              595474464
    Equivalent to 35 /8s, 126 /16s and 56 /24s
    Percentage of available APNIC address space announced:         75.5

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:                    140487
    Total ARIN prefixes after maximum aggregation:                71719
    ARIN Deaggregation factor:                                     1.96
Prefixes being announced from the ARIN address blocks:           110994
    Unique aggregates announced from the ARIN address blocks:     44983
ARIN Region origin ASes present in the Internet Routing Table:    14247
    ARIN Prefixes per ASN:                                         7.79
ARIN Region origin ASes announcing only one prefix:                5417
ARIN Region transit ASes present in the Internet Routing Table:    1472
Average ARIN Region AS path length visible:                         4.0
    Max ARIN Region AS path length visible:                          23
Number of ARIN addresses announced to Internet:               796431232
    Equivalent to 47 /8s, 120 /16s and 147 /24s
    Percentage of available ARIN address space announced:          63.3

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:                     82683
    Total RIPE prefixes after maximum aggregation:                47102
    RIPE Deaggregation factor:                                     1.76
Prefixes being announced from the RIPE address blocks:            76020
    Unique aggregates announced from the RIPE address blocks:     49879
RIPE Region origin ASes present in the Internet Routing Table:    15397
    RIPE Prefixes per ASN:                                         4.94
RIPE Region origin ASes announcing only one prefix:                7770
RIPE Region transit ASes present in the Internet Routing Table:    2401
Average RIPE Region AS path length visible:                         4.6
    Max RIPE Region AS path length visible:                          23
Number of RIPE addresses announced to Internet:               480842752
    Equivalent to 28 /8s, 169 /16s and 20 /24s
    Percentage of available RIPE address space announced:          77.5

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:                   31952
    Total LACNIC prefixes after maximum aggregation:               7382
    LACNIC Deaggregation factor:                                   4.33
Prefixes being announced from the LACNIC address blocks:          30818
    Unique aggregates announced from the LACNIC address blocks:   16131
LACNIC Region origin ASes present in the Internet Routing Table:   1438
    LACNIC Prefixes per ASN:                                      21.43
LACNIC Region origin ASes announcing only one prefix:               431
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:                        19
Number of LACNIC addresses announced to Internet:              81386624
    Equivalent to 4 /8s, 217 /16s and 220 /24s
    Percentage of available LACNIC address space announced:        53.9

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:                   7497
    Total AfriNIC prefixes after maximum aggregation:              1812
    AfriNIC Deaggregation factor:                                  4.14
Prefixes being announced from the AfriNIC address blocks:          5880
    Unique aggregates announced from the AfriNIC address blocks:   1850
AfriNIC Region origin ASes present in the Internet Routing Table:   434
    AfriNIC Prefixes per ASN:                                     13.55
AfriNIC Region origin ASes announcing only one prefix:              129
AfriNIC Region transit ASes present in the Internet Routing Table:   94
Average AfriNIC Region AS path length visible:                      5.3
    Max AfriNIC Region AS path length visible:                       31
Number of AfriNIC addresses announced to Internet:             22031360
    Equivalent to 1 /8s, 80 /16s and 44 /24s
    Percentage of available AfriNIC address space announced:       32.8

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       9508         892   Korea Telecom (KIX)
 7545     1594        301          84   TPG Internet Pty Ltd
 4755     1473        653         157   TATA Communications formerly 
17974     1413        468          29   PT TELEKOMUNIKASI INDONESIA
24560     1120        324         186   Bharti Airtel Ltd., Telemedia
 9583     1048         77         488   Sify Limited
 4808     1046       2142         294   CNCGROUP IP network: China169
 9829     1005        868          53   BSNL National Internet Backbo
17488      944        162         100   Hathway IP Over Cable Interne
18101      938        117         144   Reliance Infocom Ltd Internet

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     3681       3839         259   bellsouth.net, inc. 
 4323     2584       1109         403   Time Warner Telecom
19262     1829       4953         282   Verizon Global Networks 
 1785     1792        681         131   PaeTec Communications, Inc.
 6478     1538        298          75   AT&T Worldnet Services 
20115     1526       1534         650   Charter Communications 
18566     1524        326         180   Covad Communications 
 7018     1365       6706         887   AT&T WorldNet Services
11492     1311        236          66   Cable One 
 2386     1294        537         934   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
 6830      515       1780         318   UPC Distribution Services
 9198      470        267          15   Kazakhtelecom Data Network Ad
 3292      450       1996         389   TDC Tele Danmark
34984      449         95         200   BILISIM TELEKOM
 8866      443        133          23   Bulgarian Telecommunication C
20940      411         98         314   Akamai Technologies European 
 3320      407       7604         353   Deutsche Telekom AG
 8551      403        353          46   Bezeq International
12479      401        577           6   Uni2 Autonomous System
 8402      397        320          11   Corbina telecom

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     1384        258         163   TVCABLE BOGOTA 
 8151     1243       2700         368   UniNet S.A. de C.V. 
28573     1234        963          83   NET Servicos de Comunicao S.A
 6503     1181        354          72   AVANTEL, S.A. 
 7303      919        464         148   Telecom Argentina Stet-France
14420      644         56          93   CORPORACION NACIONAL DE TELEC
22047      541        310          15   VTR PUNTO NET S.A. 
 3816      514        225          97   Empresa Nacional de Telecomun
11172      488         83          82   Servicios Alestra S.A de C.V 
 7738      479        922          30   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
 8452      791        445          11   TEDATA
24863      762        147          36   LINKdotNET AS number
15475      419         90           8   Nile Online
36992      300        271          14   Etisalat MISR
 3741      266        987         228   The Internet Solution 
33776      230         13           5   Starcomms Nigeria Limited
24835      228         78          10   RAYA Telecom - Egypt
 6713      204        199          11   Itissalat Al-MAGHRIB
29571      192         17          11   Ci Telecom Autonomous system 
16637      141        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     3681       3839         259   bellsouth.net, inc. 
 4323     2584       1109         403   Time Warner Telecom
 4766     2421       9508         892   Korea Telecom (KIX)
19262     1829       4953         282   Verizon Global Networks 
 1785     1792        681         131   PaeTec Communications, Inc.
 7545     1594        301          84   TPG Internet Pty Ltd
 6478     1538        298          75   AT&T Worldnet Services 
20115     1526       1534         650   Charter Communications 
18566     1524        326         180   Covad Communications 
 4755     1473        653         157   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      2584        2181      Time Warner Telecom
 1785      1792        1661      PaeTec Communications, Inc.
19262      1829        1547      Verizon Global Networks 
 4766      2421        1529      Korea Telecom (KIX)
 7545      1594        1510      TPG Internet Pty Ltd
 6478      1538        1463      AT&T Worldnet Services 
17974      1413        1384      PT TELEKOMUNIKASI INDONESIA
18566      1524        1344      Covad Communications 
 4755      1473        1316      TATA Communications formerly 
11492      1311        1245      Cable One 

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
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
13317   UNALLOCATED  12.44.10.0/24         7018       AT&T WorldNet Servic

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

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

Network            Origin AS  Description
1.5.0.0/16           38639     NTT Communications Corporatio
1.6.0.0/15           38639     NTT Communications Corporatio
1.8.0.0/16           38639     NTT Communications Corporatio
1.20.0.0/16          38639     NTT Communications Corporatio
1.32.0.0/16          38639     NTT Communications Corporatio
1.37.0.0/16          38639     NTT Communications Corporatio
1.187.0.0/16         38639     NTT Communications Corporatio
14.0.0.0/24          38639     NTT Communications Corporatio
14.0.1.0/24          38639     NTT Communications Corporatio
14.0.2.0/23          38639     NTT Communications Corporatio

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        /8:24       /9:11      /10:26      /11:73      /12:216     
/13:447     /14:768     /15:1370    /16:11556   /17:5669    /18:9352    
/19:19025   /20:24651   /21:25208   /22:33478   /23:32020   /24:182909  
/25:1136    /26:1330    /27:720     /28:42      /29:9       /30:3       
/31:0       /32:6       

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

  ASN   No of nets  Total ann.   Description
 6389     2271          3681      bellsouth.net, inc. 
18566     1502          1524      Covad Communications 
 6478     1492          1538      AT&T Worldnet Services 
 4323     1391          2584      Time Warner Telecom
10620     1275          1384      TVCABLE BOGOTA 
11492     1268          1311      Cable One 
 7011     1058          1158      Citizens Utilities 
 1785     1055          1792      PaeTec Communications, Inc.
 6503      959          1181      AVANTEL, S.A. 
19262      941          1829      Verizon Global Networks 

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

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

   1:271       2:57        4:14        5:1         8:340      12:2027   
  13:1        14:429      15:15       16:3        17:8        20:9      
  23:3        24:1515     27:608      31:2        32:60       33:4      
  34:2        36:2        37:1        38:714      39:1        40:101    
  41:2306     42:13       44:3        46:703      47:4        49:164    
  50:197      52:13       55:2        56:2        57:32       58:860    
  59:495      60:386      61:1133     62:1013     63:1922     64:3867   
  65:2351     66:4339     67:1775     68:1063     69:2886     70:701    
  71:399      72:2007     73:1        74:2351     75:283      76:341    
  77:837      78:699      79:445      80:1093     81:801      82:514    
  83:462      84:644      85:1044     86:571      87:753      88:350    
  89:1568     90:174      91:3593     92:486      93:1045     94:1216   
  95:778      96:471      97:251      98:805      99:34      101:58     
 106:1       107:4       108:129     109:905     110:477     111:720    
 112:320     113:379     114:496     115:711     116:958     117:678    
 118:719     119:1036    120:256     121:753     122:1615    123:1042   
 124:1298    125:1262    128:266     129:168     130:171     131:560    
 132:110     133:20      134:220     135:49      136:212     137:146    
 138:298     139:110     140:487     141:203     142:377     143:379    
 144:493     145:52      146:424     147:194     148:640     149:276    
 150:161     151:229     152:298     153:180     154:3       155:377    
 156:179     157:345     158:131     159:371     160:312     161:211    
 162:277     163:160     164:487     165:352     166:496     167:410    
 168:728     169:156     170:760     171:69      172:2       173:1259   
 174:516     175:328     177:35      178:804     180:813     181:4      
 182:384     183:243     184:233     186:1044    187:837     188:919    
 189:1032    190:4561    192:5756    193:4780    194:3483    195:2948   
 196:1171    197:4       198:3581    199:3867    200:5585    201:1585   
 202:8302    203:8484    204:4106    205:2305    206:2653    207:3071   
 208:3909    209:3484    210:2686    211:1348    212:1932    213:1716   
 214:751     215:63      216:4844    217:1653    218:554     219:382    
 220:1199    221:476     222:318     223:101    

End of report




More information about the NANOG mailing list