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Weekly Routing Table Report

  • From: Routing Analysis Role Account
  • Date: Fri May 23 14:08:37 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 [email protected]

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

If you have any comments please contact Philip Smith <[email protected]>.

Routing Table Report   04:00 +10GMT Sat 24 May, 2008

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

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

BGP routing table entries examined:                              256264
    Prefixes after maximum aggregation:                          127251
    Deaggregation factor:                                          2.01
    Unique aggregates announced to Internet:                     124284
Total ASes present in the Internet Routing Table:                 28277
    Prefixes per ASN:                                              9.06
Origin-only ASes present in the Internet Routing Table:           24653
Origin ASes announcing only one prefix:                           11865
Transit ASes present in the Internet Routing Table:                3624
Transit-only ASes present in the Internet Routing Table:             81
Average AS path length visible in the Internet Routing Table:       3.6
    Max AS path length visible:                                      18
    Max AS path prepend of ASN (39375)                               13
Prefixes from unregistered ASNs in the Routing Table:               601
    Unregistered ASNs in the Routing Table:                         219
Number of 32-bit ASNs allocated by the RIRs:                         47
Prefixes from 32-bit ASNs in the Routing Table:                       8
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            805
Number of addresses announced to Internet:                   1870739648
    Equivalent to 111 /8s, 129 /16s and 56 /24s
    Percentage of available address space announced:               50.5
    Percentage of allocated address space announced:               62.0
    Percentage of available address space allocated:               81.4
    Percentage of address space in use by end-sites:               72.0
Total number of prefixes smaller than registry allocations:      123489

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

Prefixes being announced by APNIC Region ASes:                    58778
    Total APNIC prefixes after maximum aggregation:               21606
    APNIC Deaggregation factor:                                    2.72
Prefixes being announced from the APNIC address blocks:           55812
    Unique aggregates announced from the APNIC address blocks:    23839
APNIC Region origin ASes present in the Internet Routing Table:    3240
    APNIC Prefixes per ASN:                                       17.23
APNIC Region origin ASes announcing only one prefix:                848
APNIC Region transit ASes present in the Internet Routing Table:    500
Average APNIC Region AS path length visible:                        3.5
    Max APNIC Region AS path length visible:                         16
Number of APNIC addresses announced to Internet:              349390304
    Equivalent to 20 /8s, 211 /16s and 69 /24s
    Percentage of available APNIC address space announced:         80.1

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:                    117761
    Total ARIN prefixes after maximum aggregation:                65072
    ARIN Deaggregation factor:                                     1.81
Prefixes being announced from the ARIN address blocks:            87269
    Unique aggregates announced from the ARIN address blocks:     34233
ARIN Region origin ASes present in the Internet Routing Table:    12191
    ARIN Prefixes per ASN:                                         7.16
ARIN Region origin ASes announcing only one prefix:                4698
ARIN Region transit ASes present in the Internet Routing Table:    1136
Average ARIN Region AS path length visible:                         3.4
    Max ARIN Region AS path length visible:                          16
Number of ARIN addresses announced to Internet:               357831296
    Equivalent to 21 /8s, 84 /16s and 18 /24s
    Percentage of available ARIN address space announced:          73.5

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:                     55139
    Total RIPE prefixes after maximum aggregation:                33790
    RIPE Deaggregation factor:                                     1.63
Prefixes being announced from the RIPE address blocks:            50307
    Unique aggregates announced from the RIPE address blocks:     33864
RIPE Region origin ASes present in the Internet Routing Table:    11361
    RIPE Prefixes per ASN:                                         4.43
RIPE Region origin ASes announcing only one prefix:                5933
RIPE Region transit ASes present in the Internet Routing Table:    1718
Average RIPE Region AS path length visible:                         4.0
    Max RIPE Region AS path length visible:                          18
Number of RIPE addresses announced to Internet:               357934464
    Equivalent to 21 /8s, 85 /16s and 165 /24s
    Percentage of available RIPE address space announced:          82.1

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, 47104-48127
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:                   20118
    Total LACNIC prefixes after maximum aggregation:               5085
    LACNIC Deaggregation factor:                                   3.96
Prefixes being announced from the LACNIC address blocks:          18471
    Unique aggregates announced from the LACNIC address blocks:   10100
LACNIC Region origin ASes present in the Internet Routing Table:    947
    LACNIC Prefixes per ASN:                                      19.50
LACNIC Region origin ASes announcing only one prefix:               309
LACNIC Region transit ASes present in the Internet Routing Table:   159
Average LACNIC Region AS path length visible:                       4.1
    Max LACNIC Region AS path length visible:                        15
Number of LACNIC addresses announced to Internet:              51585024
    Equivalent to 3 /8s, 19 /16s and 32 /24s
    Percentage of available LACNIC address space announced:        51.2

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:                   3871
    Total AfriNIC prefixes after maximum aggregation:              1200
    AfriNIC Deaggregation factor:                                  3.23
Prefixes being announced from the AfriNIC address blocks:          4177
    Unique aggregates announced from the AfriNIC address blocks:   1842
AfriNIC Region origin ASes present in the Internet Routing Table:   243
    AfriNIC Prefixes per ASN:                                     17.19
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:             12240640
    Equivalent to 0 /8s, 186 /16s and 199 /24s
    Percentage of available AfriNIC address space announced:       36.5

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     1639        387          91   Videsh Sanchar Nigam Ltd. Aut
 9498     1151        550          60   BHARTI BT INTERNET LTD.
 9583     1149        140          15   Sify Limited
17488     1064         70          76   Hathway IP Over Cable Interne
 4134      854      12661         319   CHINANET-BACKBONE
 4766      847       6006         343   Korea Telecom (KIX)
23577      823         34         703   Korea Telecom (ATM-MPLS)
18101      681        149          51   Reliance Infocom Ltd Internet
 9829      598        450          12   BSNL National Internet Backbo
 1221      546       1919         420   Telstra Pty Ltd

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
 6389     1993       3087         178   bellsouth.net, inc. 
 4323     1464       1045         379   Time Warner Telecom
 2386     1434        659         871   AT&T Data Communications Serv
 7018     1384       5971         986   AT&T WorldNet Services
11492     1223        148          11   Cable One 
 7011     1088        302         616   Citizens Utilities 
18566     1044        296          10   Covad Communications 
 1785     1022        510         105   AppliedTheory Corporation 
 6197      987        597         507   BellSouth Network Solutions, 
  174      970       6837         806   Cogent Communications

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
 3292      408       1788         369   TDC Tele Danmark
 8452      356        188           7   TEDATA
 3301      337       1458         305   TeliaNet Sweden
 3320      317       7044         266   Deutsche Telekom AG
 8866      297         77          21   Bulgarian Telecommunication C
 5462      291        666          26   Telewest Broadband
 3215      284       2702          93   France Telecom Transpac
 8551      282        269          37   Bezeq International
  680      275       2047         265   DFN-IP service G-WiN
 9155      267         46          11   QualityNet AS number

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     1227       2464         228   UniNet S.A. de C.V. 
11830      601        299           9   Instituto Costarricense de El
22047      565        270          14   VTR PUNTO NET S.A. 
 7303      460        225          66   Telecom Argentina Stet-France
16814      426         27          10   NSS, S.A. 
 6471      414         85          46   ENTEL CHILE S.A. 
11172      410        117          67   Servicios Alestra S.A de C.V 
10620      388         99          70   TVCABLE BOGOTA 
14117      372         23           9   Telefonica del Sur S.A. 
20299      330         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      472         61          28   LINKdotNET AS number
 3741      286        853         223   The Internet Solution 
20858      223         34           3   EgyNet
 2018      182        173          82   Tertiary Education Network 
 5713      174        575         108   Telkom SA Ltd 
 6713      143        135          11   Itissalat Al-MAGHRIB
33783      134         10          12   EEPAD TISP TELECOM & INTERNET
 5536      121          8          16   Internet Egypt Network
29571      100         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     1993       3087         178   bellsouth.net, inc. 
 4755     1639        387          91   Videsh Sanchar Nigam Ltd. Aut
 4323     1464       1045         379   Time Warner Telecom
 2386     1434        659         871   AT&T Data Communications Serv
 7018     1384       5971         986   AT&T WorldNet Services
 8151     1227       2464         228   UniNet S.A. de C.V. 
11492     1223        148          11   Cable One 
 9498     1151        550          60   BHARTI BT INTERNET LTD.
 9583     1149        140          15   Sify Limited
 7011     1088        302         616   Citizens Utilities 

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

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

  ASN   No of nets  Net Savings Description
 4755      1639        1548      Videsh Sanchar Nigam Ltd. Aut
11492      1223        1212      Cable One 
 9583      1149        1134      Sify Limited
 9498      1151        1091      BHARTI BT INTERNET LTD.
 4323      1464        1085      Time Warner Telecom
18566      1044        1034      Covad Communications 
 8151      1227         999      UniNet S.A. de C.V. 
17488      1064         988      Hathway IP Over Cable Interne
 1785      1022         917      AppliedTheory Corporation 
22773       946         883      Cox Communications, Inc.

Complete listing at http://thyme.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          701       UUNET Technologies, 
22492   UNALLOCATED   12.2.46.0/24          7018       AT&T WorldNet Servic
15132   UNALLOCATED   12.9.150.0/24         7018       AT&T WorldNet Servic
32567   UNALLOCATED   12.14.170.0/24        7018       AT&T WorldNet Servic
13632   UNALLOCATED   12.20.55.0/24         6517       Yipes Communications
13746   UNALLOCATED   12.24.56.0/24         7018       AT&T WorldNet Servic
32567   UNALLOCATED   12.25.107.0/24        7018       AT&T WorldNet Servic
13632   UNALLOCATED   12.31.25.0/24         6517       Yipes Communications
27220   UNALLOCATED   12.35.204.0/24        7018       AT&T WorldNet Servic
26973   UNALLOCATED   12.39.152.0/24        7018       AT&T WorldNet Servic

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        /8:19       /9:9       /10:16      /11:42      /12:141     
/13:282     /14:513     /15:1009    /16:9919    /17:4362    /18:7282    
/19:15459   /20:17899   /21:17380   /22:21782   /23:22818   /24:135021  
/25:791     /26:926     /27:494     /28:81      /29:9       /30:1       
/31:0       /32:9       

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

  ASN   No of nets  Total ann.   Description
 6389     1229          1993      bellsouth.net, inc. 
11492     1205          1223      Cable One 
 2386     1133          1434      AT&T Data Communications Serv
18566     1025          1044      Covad Communications 
 9583      987          1149      Sify Limited
 4755      985          1639      Videsh Sanchar Nigam Ltd. Aut
 7011      972          1088      Citizens Utilities 
 6478      950           951      AT&T Worldnet Services 
17488      877          1064      Hathway IP Over Cable Interne
 9498      835          1151      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         8:107      12:2049     13:1        15:20       16:3      
  17:5        18:13       20:35       24:1075     25:1        32:61     
  33:3        38:425      40:93       41:649      44:2        47:12     
  52:3        55:3        56:3        57:23       58:511      59:462    
  60:442      61:997      62:1113     63:1953     64:3393     65:2417   
  66:3651     67:1197     68:681      69:2239     70:631      71:125    
  72:1755     73:5        74:973      75:216      76:308      77:654    
  78:611      79:153      80:898      81:858      82:583      83:394    
  84:566      85:1032     86:416      87:654      88:329      89:1223   
  90:11       91:1231     92:193      93:487      96:31       97:17     
  98:172      99:3       114:13      116:642     117:321     118:132    
 119:423     120:37      121:530     122:768     123:345     124:852    
 125:1131    128:325     129:200     130:131     131:401     132:66     
 133:9       134:178     135:33      136:220     137:90      138:151    
 139:64      140:484     141:99      142:399     143:299     144:352    
 145:50      146:363     147:153     148:503     149:183     150:131    
 151:191     152:141     153:134     154:10      155:273     156:174    
 157:271     158:163     159:221     160:257     161:114     162:228    
 163:186     164:524     165:448     166:309     167:323     168:609    
 169:131     170:427     171:28      172:10      189:168     190:2017   
 192:5789    193:4100    194:3212    195:2438    196:1063    198:3740   
 199:3261    200:5634    201:1436    202:7602    203:7839    204:3998   
 205:2079    206:2404    207:2766    208:3338    209:3426    210:2499   
 211:1051    212:1389    213:1637    214:473     215:49      216:4357   
 217:1200    218:355     219:416     220:1080    221:466     222:309    


End of report