[NANOG] Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri May 9 13:06:29 CDT 2008


This is an automated weekly mailing describing the state of the Internet
Routing Table as seen from APNIC's router in Japan.
Daily listings are sent to bgp-stats at lists.apnic.net

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

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

Routing Table Report   04:00 +10GMT Sat 10 May, 2008

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

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

BGP routing table entries examined:                              255385
    Prefixes after maximum aggregation:                          127091
    Deaggregation factor:                                          2.01
    Unique aggregates announced to Internet:                     123930
Total ASes present in the Internet Routing Table:                 28142
    Prefixes per ASN:                                              9.07
Origin-only ASes present in the Internet Routing Table:           24541
Origin ASes announcing only one prefix:                           11411
Transit ASes present in the Internet Routing Table:                3601
Transit-only ASes present in the Internet Routing Table:             76
Average AS path length visible in the Internet Routing Table:       3.6
    Max AS path length visible:                                      18
    Max AS path prepend of ASN (44859)                               15
Prefixes from unregistered ASNs in the Routing Table:             25412
    Unregistered ASNs in the Routing Table:                        1885
Number of 32-bit ASNs allocated by the RIRs:                         46
Prefixes from 32-bit ASNs in the Routing Table:                      10
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            789
Number of addresses announced to Internet:                   1849281216
    Equivalent to 110 /8s, 57 /16s and 202 /24s
    Percentage of available address space announced:               49.9
    Percentage of allocated address space announced:               61.3
    Percentage of available address space allocated:               81.4
    Percentage of address space in use by end-sites:               71.7
Total number of prefixes smaller than registry allocations:      122983

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

Prefixes being announced by APNIC Region ASes:                    43145
    Total APNIC prefixes after maximum aggregation:               13462
    APNIC Deaggregation factor:                                    3.20
Prefixes being announced from the APNIC address blocks:           55558
    Unique aggregates announced from the APNIC address blocks:    23715
APNIC Region origin ASes present in the Internet Routing Table:    1932
    APNIC Prefixes per ASN:                                       28.76
APNIC Region origin ASes announcing only one prefix:                544
APNIC Region transit ASes present in the Internet Routing Table:    346
Average APNIC Region AS path length visible:                        3.6
    Max APNIC Region AS path length visible:                         14
Number of APNIC addresses announced to Internet:              347251424
    Equivalent to 20 /8s, 178 /16s and 162 /24s
    Percentage of available APNIC address space announced:         79.6

APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079
APNIC Address Blocks    58/8,  59/8,  60/8,  61/8, 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, 202/8, 203/8, 210/8, 211/8,
                       218/8, 219/8, 220/8, 221/8, 222/8,

ARIN Region Analysis Summary
----------------------------

Prefixes being announced by ARIN Region ASes:                    107798
    Total ARIN prefixes after maximum aggregation:                59250
    ARIN Deaggregation factor:                                     1.82
Prefixes being announced from the ARIN address blocks:            86847
    Unique aggregates announced from the ARIN address blocks:     34386
ARIN Region origin ASes present in the Internet Routing Table:    11802
    ARIN Prefixes per ASN:                                         7.36
ARIN Region origin ASes announcing only one prefix:                4607
ARIN Region transit ASes present in the Internet Routing Table:    1037
Average ARIN Region AS path length visible:                         3.4
    Max ARIN Region AS path length visible:                          16
Number of ARIN addresses announced to Internet:               358258080
    Equivalent to 21 /8s, 90 /16s and 149 /24s
    Percentage of available ARIN address space announced:          73.6

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
ARIN Address Blocks     24/8,  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, 173/8, 174/8,
                       199/8, 204/8, 205/8, 206/8, 207/8, 208/8, 209/8,
                       216/8,

RIPE Region Analysis Summary
----------------------------

Prefixes being announced by RIPE Region ASes:                     55300
    Total RIPE prefixes after maximum aggregation:                33687
    RIPE Deaggregation factor:                                     1.64
Prefixes being announced from the RIPE address blocks:            50506
    Unique aggregates announced from the RIPE address blocks:     33769
RIPE Region origin ASes present in the Internet Routing Table:    11311
    RIPE Prefixes per ASN:                                         4.47
RIPE Region origin ASes announcing only one prefix:                5905
RIPE Region transit ASes present in the Internet Routing Table:    1720
Average RIPE Region AS path length visible:                         4.0
    Max RIPE Region AS path length visible:                          18
Number of RIPE addresses announced to Internet:               356375680
    Equivalent to 21 /8s, 61 /16s and 220 /24s
    Percentage of available RIPE address space announced:          81.7

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 - 48127
RIPE Address Blocks     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, 193/8,
                       194/8, 195/8, 212/8, 213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes:                   19926
    Total LACNIC prefixes after maximum aggregation:               4988
    LACNIC Deaggregation factor:                                   3.99
Prefixes being announced from the LACNIC address blocks:          18385
    Unique aggregates announced from the LACNIC address blocks:    9882
LACNIC Region origin ASes present in the Internet Routing Table:    898
    LACNIC Prefixes per ASN:                                      20.47
LACNIC Region origin ASes announcing only one prefix:               278
LACNIC Region transit ASes present in the Internet Routing Table:   153
Average LACNIC Region AS path length visible:                       4.1
    Max LACNIC Region AS path length visible:                        17
Number of LACNIC addresses announced to Internet:              51034112
    Equivalent to 3 /8s, 10 /16s and 184 /24s
    Percentage of available LACNIC address space announced:        50.7

LACNIC AS Blocks       26592-26623, 27648-28671, plus ERX transfers
LACNIC Address Blocks  186/8, 187/8, 189/8, 190/8, 200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes:                   3803
    Total AfriNIC prefixes after maximum aggregation:              1177
    AfriNIC Deaggregation factor:                                  3.23
Prefixes being announced from the AfriNIC address blocks:          4161
    Unique aggregates announced from the AfriNIC address blocks:   1849
AfriNIC Region origin ASes present in the Internet Routing Table:   240
    AfriNIC Prefixes per ASN:                                     17.34
AfriNIC Region origin ASes announcing only one prefix:               77
AfriNIC Region transit ASes present in the Internet Routing Table:   49
Average AfriNIC Region AS path length visible:                      3.8
    Max AfriNIC Region AS path length visible:                       14
Number of AfriNIC addresses announced to Internet:             12183552
    Equivalent to 0 /8s, 185 /16s and 232 /24s
    Percentage of available AfriNIC address space announced:       36.3

AfriNIC AS Blocks      36864-37887 & ERX transfers
AfriNIC Address Blocks  41/8, 196/8,

APNIC Region per AS prefix count summary
----------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 4755     1633        387          91   Videsh Sanchar Nigam Ltd. Aut
 9583     1180        140          15   Sify Limited
 9498     1171        550          61   BHARTI BT INTERNET LTD.
17488     1063         70          82   Hathway IP Over Cable Interne
 4134      853      12613         317   CHINANET-BACKBONE
 4766      848       6006         343   Korea Telecom (KIX)
18101      678        149          53   Reliance Infocom Ltd Internet
 9829      598        450          12   BSNL National Internet Backbo
 1221      548       1919         421   Telstra Pty Ltd
 4808      520        837         132   CNCGROUP IP network: China169

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

ARIN Region per AS prefix count summary
---------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 4323     1424       1014         378   Time Warner Telecom
 2386     1400        643         866   AT&T Data Communications Serv
 7018     1399       5976         995   AT&T WorldNet Services
11492     1212        146          33   Cable One 
 7011     1095        319         624   Citizens Utilities 
18566     1044        296          10   Covad Communications 
 6197     1028        630         543   BellSouth Network Solutions, 
 1785     1018        511         106   AppliedTheory Corporation 
  174      974       6836         803   Cogent Communications
22773      950       2394          62   Cox Communications, Inc.

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

RIPE Region per AS prefix count summary
---------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 9198      428         74           9   Kazakhtelecom Data Network Ad
 3292      409       1788         369   TDC Tele Danmark
 8452      356        188           7   TEDATA
 3301      338       1458         306   TeliaNet Sweden
 3320      324       7044         267   Deutsche Telekom AG
 8866      298         78          24   Bulgarian Telecommunication C
 5462      292        666          26   Telewest Broadband
 8551      282        269          37   Bezeq International
 3215      278       2686          90   France Telecom Transpac
  680      272       2047         262   DFN-IP service G-WiN

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

LACNIC Region per AS prefix count summary
-----------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 8151     1201       2432         227   UniNet S.A. de C.V. 
11830      600        299          14   Instituto Costarricense de El
22047      566        270          14   VTR PUNTO NET S.A. 
 7303      456        223          62   Telecom Argentina Stet-France
16814      426         27          10   NSS, S.A. 
 6471      416         85          46   ENTEL CHILE S.A. 
11172      413        117          69   Servicios Alestra S.A de C.V 
10620      390         99          69   TVCABLE BOGOTA 
14117      375         23           9   Telefonica del Sur S.A. 
20299      343         36          31   NEWCOM AMERICAS 

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

AfriNIC Region per AS prefix count summary
------------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
24863      463         61          27   LINKdotNET AS number
 3741      289        853         223   The Internet Solution 
20858      220         34           3   EgyNet
 5713      172        575         108   Telkom SA Ltd 
 6713      143        135          11   Itissalat Al-MAGHRIB
 2018      136        140          68   Tertiary Education Network 
33783      134         10          12   EEPAD TISP TELECOM & INTERNET
 5536      121          8          16   Internet Egypt Network
29571      116         13           8   Ci Telecom Autonomous system 
33776       99          6           7   Starcomms Nigeria Limited

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

Global Per AS prefix count summary
----------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 6389     3098       3037         123   bellsouth.net, inc. 
23577     1642         34         701   Korea Telecom (ATM-MPLS)
 4755     1633        387          91   Videsh Sanchar Nigam Ltd. Aut
 4323     1424       1014         378   Time Warner Telecom
 2386     1400        643         866   AT&T Data Communications Serv
 7018     1399       5976         995   AT&T WorldNet Services
11492     1212        146          33   Cable One 
 8151     1201       2432         227   UniNet S.A. de C.V. 
 9583     1180        140          15   Sify Limited
 9498     1171        550          61   BHARTI BT INTERNET LTD.

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

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

  ASN   No of nets  Net Savings Description
 4755      1633        1542      Videsh Sanchar Nigam Ltd. Aut
11492      1212        1179      Cable One 
 9583      1180        1165      Sify Limited
 9498      1171        1110      BHARTI BT INTERNET LTD.
 4323      1424        1046      Time Warner Telecom
18566      1044        1034      Covad Communications 
17488      1063         981      Hathway IP Over Cable Interne
 8151      1201         974      UniNet S.A. de C.V. 
17676      1016         951      Softbank BB Corp.
23577      1642         941      Korea Telecom (ATM-MPLS)

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

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS  Designation  Network              Transit AS  Description
14780   UNALLOCATED   4.79.181.0/24        10310       Yahoo! 
12180   UNALLOCATED   4.79.248.0/24         1239       Sprint 
12180   UNALLOCATED   8.10.16.0/24          3549       Global Crossing 
12180   UNALLOCATED   8.10.58.0/23          3549       Global Crossing 
14779   UNALLOCATED   8.12.144.0/24        10310       Yahoo! 
16927   UNALLOCATED   12.0.252.0/23          701       UUNET Technologies, 
22492   UNALLOCATED   12.2.46.0/24          1239       Sprint 
15132   UNALLOCATED   12.9.150.0/24          701       UUNET Technologies, 
32567   UNALLOCATED   12.14.170.0/24        7018       AT&T WorldNet Servic
13632   UNALLOCATED   12.20.55.0/24         6517       Yipes Communications

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

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

Network            Origin AS  Description
24.51.159.0/24        7843     Adelphia Corp. 
24.54.224.0/19       20001     HoldCo LLC - Road Runner 
24.75.160.0/19        7843     Adelphia Corp. 
24.75.192.0/18        7843     Adelphia Corp. 
24.142.40.0/21        7018     AT&T WorldNet Services
24.142.160.0/19       7018     AT&T WorldNet Services
24.246.0.0/17         7018     AT&T WorldNet Services
24.246.128.0/18       7018     AT&T WorldNet Services
62.61.220.0/24       24974     Tachyon Europe BV - Wireless 
63.140.213.0/24      22555     Universal Talkware Corporatio

Complete listing at http://thyme.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        /8:18       /9:9       /10:16      /11:40      /12:139     
/13:280     /14:507     /15:1000    /16:9894    /17:4365    /18:7282    
/19:15392   /20:17810   /21:17222   /22:21693   /23:22787   /24:134651  
/25:773     /26:921     /27:486     /28:82      /29:9       /30:1       
/31:0       /32:8       

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

  ASN   No of nets  Total ann.   Description
11492     1198          1212      Cable One 
 2386     1100          1400      AT&T Data Communications Serv
18566     1025          1044      Covad Communications 
 9583     1016          1180      Sify Limited
 4755      979          1633      Videsh Sanchar Nigam Ltd. Aut
 7011      978          1095      Citizens Utilities 
 6389      966          3098      bellsouth.net, inc. 
 6478      940           941      AT&T Worldnet Services 
17488      876          1063      Hathway IP Over Cable Interne
 9498      846          1171      BHARTI BT INTERNET LTD.

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

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

   4:9         8:108      12:2034     13:1        15:20       16:3      
  17:5        18:13       20:35       24:1069     25:1        32:61     
  33:3        38:420      40:94       41:661      44:2        47:9      
  52:3        55:3        56:3        57:22       58:517      59:459    
  60:441      61:980      62:1128     63:1959     64:3414     65:2435   
  66:3646     67:1183     68:664      69:2212     70:599      71:121    
  72:1681     73:6        74:957      75:227      76:306      77:650    
  78:610      79:151      80:904      81:865      82:628      83:386    
  84:561      85:1001     86:403      87:667      88:346      89:1300   
  90:11       91:1205     92:299      93:443      96:28       97:14     
  98:152      99:3       114:2       116:641     117:305     118:133    
 119:388     120:29      121:524     122:764     123:331     124:850    
 125:1125    128:323     129:197     130:129     131:404     132:67     
 133:9       134:180     135:31      136:222     137:112     138:144    
 139:66      140:491     141:96      142:397     143:280     144:349    
 145:50      146:360     147:152     148:502     149:183     150:131    
 151:181     152:141     153:133     154:10      155:260     156:173    
 157:267     158:165     159:222     160:254     161:111     162:213    
 163:197     164:520     165:447     166:305     167:319     168:606    
 169:131     170:426     171:28      172:2       189:196     190:1864   
 192:5765    193:4102    194:3258    195:2428    196:1065    198:3728   
 199:3238    200:5674    201:1454    202:7614    203:7808    204:3980   
 205:2080    206:2393    207:2743    208:3322    209:3431    210:2526   
 211:1048    212:1387    213:1654    214:454     215:50      216:4335   
 217:1225    218:349     219:407     220:1069    221:480     222:305    


End of report




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