Home page logo
/

nanog logo nanog mailing list archives

Weekly Routing Table Report
From: Routing Analysis Role Account <cscora () apnic net>
Date: Sat, 16 Apr 2011 04:40:28 +1000 (EST)

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 () lists apnic net

For historical data, please see http://thyme.rand.apnic.net.

If you have any comments please contact Philip Smith <pfs () cisco com>.

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

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

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

BGP routing table entries examined:                              354448
    Prefixes after maximum aggregation:                          160446
    Deaggregation factor:                                          2.21
    Unique aggregates announced to Internet:                     175187
Total ASes present in the Internet Routing Table:                 37330
    Prefixes per ASN:                                              9.49
Origin-only ASes present in the Internet Routing Table:           31290
Origin ASes announcing only one prefix:                           15055
Transit ASes present in the Internet Routing Table:                5039
Transit-only ASes present in the Internet Routing Table:            133
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      36
    Max AS path prepend of ASN (36992)                               29
Prefixes from unregistered ASNs in the Routing Table:               598
    Unregistered ASNs in the Routing Table:                         263
Number of 32-bit ASNs allocated by the RIRs:                       1295
Number of 32-bit ASNs visible in the Routing Table:                1001
Prefixes from 32-bit ASNs in the Routing Table:                    2210
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            154
Number of addresses announced to Internet:                   2411560512
    Equivalent to 143 /8s, 189 /16s and 126 /24s
    Percentage of available address space announced:               65.1
    Percentage of allocated address space announced:               65.1
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               90.5
Total number of prefixes smaller than registry allocations:      147006

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

Prefixes being announced by APNIC Region ASes:                    88171
    Total APNIC prefixes after maximum aggregation:               29869
    APNIC Deaggregation factor:                                    2.95
Prefixes being announced from the APNIC address blocks:           85167
    Unique aggregates announced from the APNIC address blocks:    37065
APNIC Region origin ASes present in the Internet Routing Table:    4407
    APNIC Prefixes per ASN:                                       19.33
APNIC Region origin ASes announcing only one prefix:               1227
APNIC Region transit ASes present in the Internet Routing Table:    699
Average APNIC Region AS path length visible:                        4.6
    Max APNIC Region AS path length visible:                         20
Number of APNIC region 32-bit ASNs visible in the Routing Table:     48
Number of APNIC addresses announced to Internet:              609096480
    Equivalent to 36 /8s, 78 /16s and 19 /24s
    Percentage of available APNIC address space announced:         77.2

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:                    139725
    Total ARIN prefixes after maximum aggregation:                71044
    ARIN Deaggregation factor:                                     1.97
Prefixes being announced from the ARIN address blocks:           112194
    Unique aggregates announced from the ARIN address blocks:     45081
ARIN Region origin ASes present in the Internet Routing Table:    14325
    ARIN Prefixes per ASN:                                         7.83
ARIN Region origin ASes announcing only one prefix:                5472
ARIN Region transit ASes present in the Internet Routing Table:    1489
Average ARIN Region AS path length visible:                         3.9
    Max ARIN Region AS path length visible:                          23
Number of ARIN region 32-bit ASNs visible in the Routing Table:      11
Number of ARIN addresses announced to Internet:               797865344
    Equivalent to 47 /8s, 142 /16s and 117 /24s
    Percentage of available ARIN address space announced:          63.4

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:                     83950
    Total RIPE prefixes after maximum aggregation:                47756
    RIPE Deaggregation factor:                                     1.76
Prefixes being announced from the RIPE address blocks:            77071
    Unique aggregates announced from the RIPE address blocks:     50757
RIPE Region origin ASes present in the Internet Routing Table:    15521
    RIPE Prefixes per ASN:                                         4.97
RIPE Region origin ASes announcing only one prefix:                7794
RIPE Region transit ASes present in the Internet Routing Table:    2431
Average RIPE Region AS path length visible:                         4.7
    Max RIPE Region AS path length visible:                          36
Number of RIPE region 32-bit ASNs visible in the Routing Table:     744
Number of RIPE addresses announced to Internet:               466827392
    Equivalent to 27 /8s, 211 /16s and 56 /24s
    Percentage of available RIPE address space announced:          75.2

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:                   32396
    Total LACNIC prefixes after maximum aggregation:               7436
    LACNIC Deaggregation factor:                                   4.36
Prefixes being announced from the LACNIC address blocks:          31349
    Unique aggregates announced from the LACNIC address blocks:   16421
LACNIC Region origin ASes present in the Internet Routing Table:   1439
    LACNIC Prefixes per ASN:                                      21.79
LACNIC Region origin ASes announcing only one prefix:               429
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 region 32-bit ASNs visible in the Routing Table:   193
Number of LACNIC addresses announced to Internet:              81899648
    Equivalent to 4 /8s, 225 /16s and 176 /24s
    Percentage of available LACNIC address space announced:        54.2

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:                   7714
    Total AfriNIC prefixes after maximum aggregation:              1829
    AfriNIC Deaggregation factor:                                  4.22
Prefixes being announced from the AfriNIC address blocks:          6082
    Unique aggregates announced from the AfriNIC address blocks:   1881
AfriNIC Region origin ASes present in the Internet Routing Table:   448
    AfriNIC Prefixes per ASN:                                     13.58
AfriNIC Region origin ASes announcing only one prefix:              133
AfriNIC Region transit ASes present in the Internet Routing Table:   99
Average AfriNIC Region AS path length visible:                      4.7
    Max AfriNIC Region AS path length visible:                       31
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:    5
Number of AfriNIC addresses announced to Internet:             22753536
    Equivalent to 1 /8s, 91 /16s and 49 /24s
    Percentage of available AfriNIC address space announced:       33.9

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     2433       9484         902   Korea Telecom (KIX)
17974     1813        515          29   PT TELEKOMUNIKASI INDONESIA
 7545     1543        300          80   TPG Internet Pty Ltd
 4755     1445        638         166   TATA Communications formerly 
24560     1137        322         203   Bharti Airtel Ltd., Telemedia
 4808     1064       2140         293   CNCGROUP IP network: China169
 9583     1055         77         496   Sify Limited
 9829     1008        870          50   BSNL National Internet Backbo
17488      942        162          98   Hathway IP Over Cable Interne
18101      934        116         139   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     3662       3822         255   bellsouth.net, inc. 
 4323     2661       1090         396   Time Warner Telecom
 1785     1788        681         128   PaeTec Communications, Inc.
18566     1759        349         229   Covad Communications 
 6478     1623        307          37   AT&T Worldnet Services 
20115     1535       1552         639   Charter Communications 
19262     1495       4949         298   Verizon Global Networks 
 7018     1350       6801         878   AT&T WorldNet Services
22773     1298       2865          84   Cox Communications, Inc.
 2386     1269        536         912   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      518       1780         320   UPC Distribution Services
34984      505         98         183   BILISIM TELEKOM
29049      467         33          34   AzerSat LLC.
 3292      454       1997         391   TDC Tele Danmark
 8866      446        134          26   Bulgarian Telecommunication C
20940      436        126         335   Akamai Technologies European 
 3320      418       7607         364   Deutsche Telekom AG
12479      406        577           6   Uni2 Autonomous System
 8551      403        353          46   Bezeq International
 8402      401        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     1426        265         157   TVCABLE BOGOTA 
28573     1274        972          86   NET Servicos de Comunicao S.A
 8151     1252       2686         374   UniNet S.A. de C.V. 
 7303      924        465         147   Telecom Argentina Stet-France
 6503      901        354          72   AVANTEL, S.A. 
14420      663         53          91   CORPORACION NACIONAL DE TELEC
22047      568        310          15   VTR PUNTO NET S.A. 
 3816      516        225          98   Empresa Nacional de Telecomun
11172      487         99          81   Servicios Alestra S.A de C.V 
27947      480         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
 8452      840        445          11   TEDATA
24863      778        147          39   LINKdotNET AS number
15475      422         90           8   Nile Online
36992      295        287          12   Etisalat MISR
 3741      266        985         227   The Internet Solution 
 6713      235        215          13   Itissalat Al-MAGHRIB
33776      227         13           5   Starcomms Nigeria Limited
24835      222         78          10   RAYA Telecom - Egypt
29571      161         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     3662       3822         255   bellsouth.net, inc. 
 4323     2661       1090         396   Time Warner Telecom
 4766     2433       9484         902   Korea Telecom (KIX)
23456     2210        644        1206   32-bit ASN transition
17974     1813        515          29   PT TELEKOMUNIKASI INDONESIA
 1785     1788        681         128   PaeTec Communications, Inc.
18566     1759        349         229   Covad Communications 
 6478     1623        307          37   AT&T Worldnet Services 
 7545     1543        300          80   TPG Internet Pty Ltd
20115     1535       1552         639   Charter Communications 

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      2661        2265      Time Warner Telecom
17974      1813        1784      PT TELEKOMUNIKASI INDONESIA
 1785      1788        1660      PaeTec Communications, Inc.
 6478      1623        1586      AT&T Worldnet Services 
 4766      2433        1531      Korea Telecom (KIX)
18566      1759        1530      Covad Communications 
 7545      1543        1463      TPG Internet Pty Ltd
 4755      1445        1279      TATA Communications formerly 
10620      1426        1269      TVCABLE BOGOTA 
11492      1262        1247      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
45083   UNALLOCATED  1.45.0.0/16           4808       CNCGROUP IP network:
45083   UNALLOCATED  1.45.92.0/22          4808       CNCGROUP IP network:
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

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
31.7.168.0/21        48057     Company for interactive techn
31.10.32.0/20        42004     Unlimited Group
31.10.56.0/21        23456     32-bit ASN transition
31.134.48.0/20       48559     Infomex Sp. z o.o.

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      /10:26      /11:76      /12:219     
/13:452     /14:774     /15:1376    /16:11604   /17:5737    /18:9469    
/19:19145   /20:25180   /21:25557   /22:33681   /23:32570   /24:185400  
/25:1120    /26:1274    /27:701     /28:40      /29:8       /30:2       
/31:0       /32:6       

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

  ASN   No of nets  Total ann.   Description
 6389     2259          3662      bellsouth.net, inc. 
18566     1727          1759      Covad Communications 
 6478     1577          1623      AT&T Worldnet Services 
 4323     1356          2661      Time Warner Telecom
10620     1316          1426      TVCABLE BOGOTA 
11492     1211          1262      Cable One 
23456     1143          2210      32-bit ASN transition
 7011     1062          1161      Citizens Utilities 
 1785     1058          1788      PaeTec Communications, Inc.
22773      842          1298      Cox Communications, Inc.

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

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

   1:256       2:62        4:14        5:1         8:347      12:2000   
  13:1        14:436      15:15       16:3        17:8        20:9      
  23:5        24:1604     27:721      31:220      32:60       33:3      
  34:2        37:1        38:764      40:101      41:2402     42:1      
  44:3        46:851      47:4        49:173      50:358      52:13     
  55:7        56:2        57:27       58:844      59:478      60:387    
  61:1238     62:1008     63:1920     64:3916     65:2325     66:4350   
  67:1814     68:1082     69:2956     70:700      71:345      72:1906   
  73:1        74:2337     75:299      76:337      77:840      78:688    
  79:460      80:1088     81:828      82:505      83:455      84:646    
  85:1067     86:564      87:761      88:339      89:1584     90:181    
  91:3711     92:513      93:1053     94:1257     95:792      96:453    
  97:250      98:821      99:35      101:62      103:1       106:1      
 107:4       108:80      109:954     110:543     111:694     112:325    
 113:389     114:524     115:681     116:940     117:675     118:805    
 119:1137    120:290     121:675     122:1631    123:1062    124:1247   
 125:1266    128:265     129:164     130:172     131:562     132:113    
 133:20      134:217     135:49      136:213     137:142     138:301    
 139:103     140:487     141:174     142:398     143:394     144:484    
 145:53      146:440     147:204     148:597     149:243     150:171    
 151:187     152:307     153:180     154:3       155:394     156:190    
 157:354     158:132     159:382     160:315     161:245     162:277    
 163:164     164:488     165:350     166:514     167:419     168:725    
 169:154     170:780     171:75      172:1       173:1492    174:530    
 175:356     177:71      178:852     180:815     181:7       182:419    
 183:196     184:243     185:1       186:1139    187:807     188:988    
 189:1001    190:4841    192:5784    193:4816    194:3468    195:2966   
 196:1208    197:16      198:3568    199:3919    200:5531    201:1500   
 202:8347    203:8452    204:4140    205:2323    206:2730    207:3027   
 208:3951    209:3501    210:2728    211:1361    212:1977    213:1719   
 214:732     215:67      216:4863    217:1659    218:556     219:385    
 220:1195    221:479     222:341     223:137    

End of report


  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]
AlienVault